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Submarine HNMS O 9 (P 09)

18 Jul 1943
HrMs O 9 (Lt.Cdr. J.F. Drijfhout van Hooff, RNN) participated in A/S exercises off Campbeltown with HMS Bretwalda (Skr.Lt. J.R. Coultas, RD, RNR) and HMS L' Atlantique (Skr. A. McKay, RNR). (1)

19 Jul 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS L'Incomprise (Lt.Cdr.(Retd.) F.S. Deveson, RNR) and HMS Altair (Lt.Cdr.(Retd.) W.R.T. Clements, RNR). (1)

20 Jul 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS Bretwalda (Skr.Lt. J.R. Coultas, RD, RNR) and HMS L' Atlantique (Skr. A. McKay, RNR). (1)

21 Jul 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS Bretwalda (Skr.Lt. J.R. Coultas, RD, RNR) and HMS L' Atlantique (Skr. A. McKay, RNR). (1)

22 Jul 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS Shemara (Cdr.(Retd.) H. Buckle, RN) and HMS St. Modwen (Lt.Cdr. J.M. Lycett, RD, RNR). (1)

23 Jul 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS Shemara (Cdr.(Retd.) H. Buckle, RN) and HMS Bedlington (Skr. A.W. Peak, RNR). (1)

25 Jul 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS Spaniel and HMS Boarhound (Skr. A. Keable, RNR). Upon completion of these exercises she proceeded to Ardishaig. (1)

26 Jul 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Ardishaig together with ML's. (1)

27 Jul 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Ardishaig together with ML's. Upon completion of these exercises she returned to Campbeltown. (1)

28 Jul 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS Altair (Lt.Cdr. (retired) W.R.T. Clements, RNR) and HMS L' Atlantique (Skr. A. McKay, RNR). (1)

29 Jul 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS Shemara (Cdr.(retired) H. Buckle, RN) and HMS St. Modwen (Lt.Cdr. J.M. Lycett, RD, RNR). (1)

30 Jul 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS Shemara (Cdr.(Retd.) H. Buckle, RN) and HMS St. Modwen (Lt.Cdr. J.M. Lycett, RD, RNR). (1)

1 Aug 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS Altair (Lt.Cdr.(Retd.) W.R.T. Clements, RNR) and HMS L' Atlantique (Skr. A. McKay, RNR). (1)

2 Aug 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS Bedlington (Skr. A.W. Peak, RNR) and HMS Spaniel. (1)

3 Aug 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS Boarhound (Skr. A. Keable, RNR) and HMS L'Incomprise (Lt.Cdr.(Retd.) F.S. Deveson, RNR). (1)

4 Aug 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS Shemara (Cdr.(Retd.) H. Buckle, RN) and HMS Bretwalda (Skr.Lt. J.R. Coultas, RD, RNR). (1)

6 Aug 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS Altair (Lt.Cdr.(Retd.) W.R.T. Clements, RNR) and HMS Shemara (Cdr.(Retd.) H. Buckle, RN). (1)

8 Aug 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS Altair (Lt.Cdr.(Retd.) W.R.T. Clements, RNR) and HMS L' Atlantique (Skr. A. McKay, RNR). (1)

9 Aug 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS Radiant (T/Lt. C.S.R. Shapland, RNVR) and HMS L'Incomprise (Lt.Cdr.(Retd.) F.S. Deveson, RNR). (1)

10 Aug 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS Altair (Lt.Cdr.(Retd.) W.R.T. Clements, RNR) and HMS L' Atlantique (Skr. A. McKay, RNR). (1)

11 Aug 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS Radiant (T/Lt. C.S.R. Shapland, RNVR) and HMS L'Incomprise (Lt.Cdr.(Retd.) F.S. Deveson, RNR). (1)

12 Aug 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS Shemara (Cdr.(Retd.) H. Buckle, RN) and HMS Spaniel. (1)

15 Aug 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) shifted from Campbeltown to Ardishaig. (1)

16 Aug 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Ardishaig together with ML's. (1)

17 Aug 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Ardishaig together with ML's. Upon completion of these exercises she returned to Campbeltown. (1)

18 Aug 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS St. Modwen (Lt.Cdr. J.M. Lycett, RD, RNR) and HMS Boarhound (Skr. A. Keable, RNR). (1)

19 Aug 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS Altair (Lt.Cdr.(Retd.) W.R.T. Clements, RNR) and HMS Bretwalda (Skr.Lt. J.R. Coultas, RD, RNR). (1)

20 Aug 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS Spaniel and HMS Boarhound (Skr. A. Keable, RNR). (1)

22 Aug 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS Spaniel and HMS Bedlington (Skr. A.W. Peak, RNR). (1)

23 Aug 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS Shemara (Cdr.(retired) H. Buckle, RN) and HMS L'Incomprise (Lt.Cdr. (retired) F.S. Deveson, RNR). (1)

24 Aug 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS Shemara (Cdr.(Retd.) H. Buckle, RN) and HMS St. Modwen (Lt.Cdr. J.M. Lycett, RD, RNR). (1)

25 Aug 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS Shemara (Cdr.(Retd.) H. Buckle, RN) and HMS Spaniel. (1)

26 Aug 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS Shemara (Cdr.(Retd.) H. Buckle, RN) and HMS St. Modwen (Lt.Cdr. J.M. Lycett, RD, RNR). (1)

27 Aug 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS Spaniel and HMS Bedlington (Skr. A.W. Peak, RNR). (1)

29 Aug 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS Tuscarora (Lt.Cdr.(Retd.) H.T. Pitt, RN) and HMS Altair (Lt.Cdr.(Retd.) W.R.T. Clements, RNR). (1)

30 Aug 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS Radiant (T/Lt. C.S.R. Shapland, RNVR) and HMS St. Modwen (Lt.Cdr. J.M. Lycett, RD, RNR). (1)

31 Aug 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS Shemara (Cdr.(Retd.) H. Buckle, RN) and HMS Spaniel. (1)

1 Sep 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS Radiant (T/Lt. C.S.R. Shapland, RNVR) and HMS Altair (Lt.Cdr.(Retd.) W.R.T. Clements, RNR). (1)

2 Sep 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS Radiant (T/Lt. C.S.R. Shapland, RNVR) and HMS Altair (Lt.Cdr. (retired) W.R.T. Clements, RNR). (1)

3 Sep 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS Radiant (T/Lt. C.S.R. Shapland, RNVR) and HMS Altair (Lt.Cdr.(Retd.) W.R.T. Clements, RNR). (1)

5 Sep 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS Tuscarora (Lt.Cdr.(Retd.) H.T. Pitt, RN), HMS L' Atlantique (Skr. A. McKay, RNR), HMS Altair (Lt.Cdr.(Retd.) W.R.T. Clements, RNR) and HMS Boarhound (Skr. A. Keable, RNR). (1)

6 Sep 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS Radiant (T/Lt. C.S.R. Shapland, RNVR) and HMS Altair (Lt.Cdr.(Retd.) W.R.T. Clements, RNR). (1)

7 Sep 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS Tuscarora (Lt.Cdr.(Retd.) H.T. Pitt, RN) and HMS Bedlington (Skr. A.W. Peak, RNR). (1)

8 Sep 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS Radiant (T/Lt. C.S.R. Shapland, RNVR) and HMS Altair (Lt.Cdr.(Retd.) W.R.T. Clements, RNR). (1)

9 Sep 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS Shemara (Cdr.(Retd.) H. Buckle, RN), HMS Tuscarora (Lt.Cdr.(Retd.) H.T. Pitt, RN) and HMS L' Atlantique (Skr. A. McKay, RNR). (1)

12 Sep 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS L'Incomprise (Lt.Cdr.(Retd.) F.S. Deveson, RNR) and HMS St. Modwen (Lt.Cdr. J.M. Lycett, RD, RNR). (1)

13 Sep 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS Tuscarora (Lt.Cdr.(Retd.) H.T. Pitt, RN) and HMS L' Atlantique (Skr. A. McKay, RNR). (1)

14 Sep 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS Altair (Lt.Cdr. (retired) W.R.T. Clements, RNR) and HMS L' Atlantique (Skr. A. McKay, RNR). (1)

15 Sep 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS La Cordeliere (Lt.Cdr. A.J.G. Barff, RNR) and HMS Altair (Lt.Cdr.(Retd.) W.R.T. Clements, RNR). (1)

16 Sep 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS Shemara (Cdr.(Retd.) H. Buckle, RN) and HMS Boarhound (Skr. A. Keable, RNR). (1)

17 Sep 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS Tuscarora (Lt.Cdr.(Retd.) H.T. Pitt, RN) and HMS L' Atlantique (Skr. A. McKay, RNR). (1)

20 Sep 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS Tuscarora (Lt.Cdr.(Retd.) H.T. Pitt, RN) and HMS L' Atlantique (Skr. A. McKay, RNR). (1)

21 Sep 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS Radiant (T/Lt. C.S.R. Shapland, RNVR) and HMS Altair (Lt.Cdr.(Retd.) W.R.T. Clements, RNR). (1)

22 Sep 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS Spaniel and HMS Boarhound (Skr. A. Keable, RNR). (1)

23 Sep 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS Radiant (T/Lt. C.S.R. Shapland, RNVR) and HMS Altair (Lt.Cdr.(Retd.) W.R.T. Clements, RNR). (1)

26 Sep 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS Boarhound (Skr. A. Keable, RNR). (1)

27 Sep 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) shifted from Campbeltown to Ardishaig where she participate in A/S exercises with ML's. (1)

28 Sep 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises with ML's off Ardishaig. (1)

29 Sep 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises with ML's off Ardishaig. Upon completion of these exercises she returned to Campbeltown. (1)

30 Sep 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS Altair (Lt.Cdr.(Retd.) W.R.T. Clements, RNR). (1)

1 Oct 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) shifted from Campbeltown to Rothesay. (1)

2 Oct 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) was docked at Port Bannatyne. (1)

6 Oct 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) was undocked. (1)

13 Oct 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) departed Rothesay for Tobermory. She was escorted by HMS Kihna (A/Cdr.(Retd.) A.R.W. Sayle, RD, RNR). (1)

14 Oct 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) arrived at Tobermory. (1)

15 Oct 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Tobermory together with HMS Texada (T/Lt. H.G. Reigate, RNVR), HMS Northern Sun (T/Lt. H. Meredith, RNVR), HMS Chelmer (T/A/Lt.Cdr. R.A. Cherry, RNR) and HMS Deptford (Lt.Cdr. H.R. White, RN). (2)

16 Oct 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Tobermory together with HMS Northern Sun (T/Lt. H. Meredith, RNVR), HMS Chelmer (T/A/Lt.Cdr. R.A. Cherry, RNR) and HMS Deptford (Lt.Cdr. H.R. White, RN). (2)

17 Oct 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Tobermory together with HMS Chelmer (T/A/Lt.Cdr. R.A. Cherry, RNR), HMS Grassholm (T/Lt. J.A. Antonsen, RNR), HMS Vanessa (Lt. C.E. Sheen, DSC, RN) and HMS Northern Sun (T/Lt. H. Meredith, RNVR), (2)

18 Oct 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Tobermory together with HMS Versatile (Lt.Cdr. G.S. Corlett, DSC, RN), HMS Vanessa (Lt. C.E. Sheen, DSC, RN), HMS Grassholm (T/Lt. J.A. Antonsen, RNR) and HMS Northern Gem (A/Skr.Lt. W.C. King, RNR). (2)

21 Oct 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Tobermory together with HMS Ganilly (T/Lt. M.W. Hampson, RNVR), HMS St. Agnes (A/Skr.Lt. W. Kirman, RNR), HMS Deptford (Lt.Cdr. H.R. White, RN) and HMS Grassholm (T/Lt. J.A. Antonsen, RNR). (2)

22 Oct 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Tobermory together with HMS Ganilly (T/Lt. M.W. Hampson, RNVR), HMS St. Agnes (A/Skr.Lt. W. Kirman, RNR), HMS Vanessa (Lt. C.E. Sheen, DSC, RN) and HMS Versatile (Lt.Cdr. G.S. Corlett, DSC, RN). (2)

23 Oct 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Tobermory together with HMS Versatile (Lt.Cdr. G.S. Corlett, DSC, RN), HMS Vanessa (Lt. C.E. Sheen, DSC, RN), HMS Minalto (A/Skr.Lt. A.G. Day, RNR). (2)

24 Oct 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Tobermory together with HMS Versatile (Lt.Cdr. G.S. Corlett, DSC, RN), HMS Black Swan (Lt.Cdr.(Retd.) R.C.V. Thomson, RN) and HMS Minalto (A/Skr.Lt. A.G. Day, RNR). (2)

27 Oct 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Tobermory together with HMS Black Swan (Lt.Cdr. (retired) R.C.V. Thomson, RN) and HMS Rosebay (Lt. R.J. Tadhunter, RNR). (2)

28 Oct 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Tobermory together with HMS Black Swan (Lt.Cdr. (retired) R.C.V. Thomson, RN), HMS Rosebay (Lt. R.J. Tadhunter, RNR), HMS Chelmer (T/A/Lt.Cdr. R.A. Cherry, RNR) and HMS Vervain (T/Lt. R.A. Howell, RNVR). (2)

29 Oct 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Tobermory together with HMS Black Swan (Lt.Cdr. (retired) R.C.V. Thomson, RN), HMS Chelmer (T/A/Lt.Cdr. R.A. Cherry, RNR), HMS Minalto (A/Skr.Lt. A.G. Day, RNR) and HMS Vervain (T/Lt. R.A. Howell, RNVR). (2)

30 Oct 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Tobermory together with HMS Vervain (T/Lt. R.A. Howell, RNVR), HMS Minalto (A/Skr.Lt. A.G. Day, RNR) and HMS Lady Sharazad (Lt.Cdr. W.C. Shepherd, RNR). (2)

1 Nov 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Tobermory together with HMS Black Swan (Lt.Cdr.(Retd.) R.C.V. Thomson, RN) and HMS Watchman (Lt.Cdr. G.H.D. Williams, RN). (2)

2 Nov 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Tobermory together with HMS Vervain (T/Lt. R.A. Howell, RNVR), HMS Rosebay (Lt. R.J. Tadhunter, RNR) and HMS Watchman (Lt.Cdr. G.H.D. Williams, RN). (2)

3 Nov 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Tobermory together with HMS Watchman (Lt.Cdr. G.H.D. Williams, RN), HMS Vervain (T/Lt. R.A. Howell, RNVR) and HMS Rosebay (Lt. R.J. Tadhunter, RNR). (2)

7 Nov 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Tobermory together with HMS Avon (Lt.Cdr. P.G.A. King, RD, RNR) and HMS Watchman (Lt.Cdr. G.H.D. Williams, RN). (2)

8 Nov 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Tobermory together with HMS Avon (Lt.Cdr. P.G.A. King, RD, RNR), HMS Watchman (Lt.Cdr. G.H.D. Williams, RN) and HMS Hadleigh Castle (T/A/Lt.Cdr. H.V. Gordon, DSC, RNVR). (2)

9 Nov 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Tobermory together with HMS Hadleigh Castle (T/A/Lt.Cdr. H.V. Gordon, DSC, RNVR), HMS Avon (Lt.Cdr. P.G.A. King, RD, RNR) and HMS Herschell (T/Lt. J.E. Freestone, RNR). (2)

10 Nov 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Tobermory together with HMS Hadleigh Castle (T/A/Lt.Cdr. H.V. Gordon, DSC, RNVR). (2)

12 Nov 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Tobermory together with HMS Windrush, HMS Avon (Lt.Cdr. P.G.A. King, RD, RNR) and HMS Mallow. (2)

13 Nov 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Tobermory together with HMS Avon (Lt.Cdr. P.G.A. King, RD, RNR) and HMS Mallow, HMS Watchman (Lt.Cdr. G.H.D. Williams, RN) and HMS Windrush. (2)

14 Nov 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Tobermory together with HMS Burnet (Lt. D.S. Charles, RNR) and HMS Herschell (T/Lt. J.E. Freestone, RNR). (2)

15 Nov 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Tobermory together with HMS Burnet (Lt. D.S. Charles, RNR) and HMS Snowflake (Lt. E.J. Powell, RNR). (2)

18 Nov 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Tobermory together with HMS Hadleigh Castle (T/A/Lt.Cdr. H.V. Gordon, DSC, RNVR) and HMS Mallow. (2)

19 Nov 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Tobermory together with HMS Hadleigh Castle (T/A/Lt.Cdr. H.V. Gordon, DSC, RNVR), HMS Snowflake (Lt. E.J. Powell, RNR) and HMS Burnet (Lt. D.S. Charles, RNR).

Upon completion of these exercises O 9 departed Tobermory for Campbeltown. She was escorted by HMS Avon (Lt.Cdr. P.G.A. King, RD, RNR). (2)

20 Nov 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) arrived at Campbeltown. (2)

21 Nov 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) shifted from Campbeltown to Rothesay. (2)

3 Dec 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) shifted from Rothesay to Campbeltown. after arriving off Campbeltown she participated in A/S exercises with HMS Radiant (T/Lt. C.S.R. Shapland, RNVR) and HMS La Flore (Lt. J. Mayling, RN). (2)

5 Dec 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS Shemara (Cdr.(Retd.) H. Buckle, RN) and HMS St. Modwen (Lt.Cdr. J.M. Lycett, RD, RNR). (2)

6 Dec 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS Shemara (Cdr.(Retd.) H. Buckle, RN) and HMS La Flore (Lt. J. Mayling, RN). (2)

7 Dec 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS Radiant (T/Lt. C.S.R. Shapland, RNVR), HMS Altair (T/Lt. J.L. James, RNR), HMS Valena (T/A/Lt.Cdr. A. McKinlay, RNR) and HMS Bretwalda (Skr. J.B. Henderson, RNR). (2)

8 Dec 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS Altair (T/Lt. J.L. James, RNR) and HMS Bretwalda (Skr. J.B. Henderson, RNR). (2)

9 Dec 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS Shemara (Cdr.(Retd.) H. Buckle, RN) and HMS St. Modwen (Lt.Cdr. J.M. Lycett, RD, RNR). (2)

12 Dec 1943
During 12 - 17 December 1943, HrMs O 9 (Lt. J.B.M.J. Maas, RNN), participated in A/S exercises with aircraft near Campbeltown. (2)

20 Dec 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS Valena (T/A/Lt.Cdr. A. McKinlay, RNR) and HMS Boarhound (Skr. A. Keable, RNR). (2)

21 Dec 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS Valena (T/A/Lt.Cdr. A. McKinlay, RNR) and HMS Bretwalda (Skr. J.B. Henderson, RNR). (2)

22 Dec 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS La Cordeliere (Lt.Cdr. A.J.G. Barff, RNR) and HMS Boarhound (Skr. A. Keable, RNR). (2)

23 Dec 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS Shemara (Cdr.(Retd.) H. Buckle, RN) and HMS St. Modwen (Lt.Cdr. J.M. Lycett, RD, RNR). (2)

24 Dec 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS St. Modwen (Lt.Cdr. J.M. Lycett, RD, RNR) and HMS Valena (T/A/Lt.Cdr. A. McKinlay, RNR). (2)

26 Dec 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS Valena (T/A/Lt.Cdr. A. McKinlay, RNR) and HMS Tuscarora (Lt.Cdr.(Retd.) H.T. Pitt, RN). (2)

29 Dec 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) shifted from Campbeltown to Ardishaid where she participated in A/S exercises with ML's. (2)

30 Dec 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises with ML's off Ardishaig. (2)

31 Dec 1943
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises with ML's off Ardishaig. (2)

1 Jan 1944
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises with ML's off Ardishaig. Upon completion of these exercises she returned to Campbeltown. (2)

3 Jan 1944
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS Shemara (Cdr.(Retd.) H. Buckle, RN) and HMS Boarhound (Skr. A. Keable, RNR). (2)

4 Jan 1944
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS Shemara (Cdr.(Retd.) H. Buckle, RN) and HMS St. Modwen (Lt.Cdr. J.M. Lycett, RD, RNR). (2)

5 Jan 1944
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS Shemara (Cdr.(retired) H. Buckle, RN) and HMS La Cordeliere (A/Lt.Cdr. A.J.G. Barff, RNR). (2)

6 Jan 1944
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS Altair (T/Lt. J.L. James, RNR) and HMS St. Modwen (Lt.Cdr. J.M. Lycett, RD, RNR). (2)

7 Jan 1944
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS St. Modwen (Lt.Cdr. J.M. Lycett, RD, RNR) and HMS Radiant (T/Lt. C.S.R. Shapland, RNVR). (2)

9 Jan 1944
and HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS St. Modwen (Lt.Cdr. J.M. Lycett, RD, RNR) and HMS Bedlington (Skr. A.W. Peak, RNR). (2)

10 Jan 1944
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS St. Modwen (Lt.Cdr. J.M. Lycett, RD, RNR) and HMS Valena (T/A/Lt.Cdr. A. McKinlay, RNR). (2)

13 Jan 1944
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS Boarhound (Skr. A. Keable, RNR) and HMS Bretwalda (Skr. J.B. Henderson, RNR). (2)

14 Jan 1944
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS St. Modwen (Lt.Cdr. J.M. Lycett, DSC, RD, RNR) and HMS Radiant (T/Lt. C.S.R. Shapland, RNVR). (2)

16 Jan 1944
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS La Cordeliere (Lt.Cdr. A.J.G. Barff, RNR). (2)

17 Jan 1944
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with aircraft. (2)

18 Jan 1944
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with aircraft. (2)

20 Jan 1944
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with aircraft. (2)

21 Jan 1944
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with aircraft. (2)

24 Jan 1944
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS Shemara (Cdr.(Retd.) H. Buckle, RN) and HMS Boarhound (Skr. A. Keable, RNR). (2)

26 Jan 1944
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS Shemara (Cdr.(retired) H. Buckle, RN) and HMS La Cordeliere (Lt.Cdr. A.J.G. Barff, RNR). (2)

27 Jan 1944
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS Tuscarora (Lt.Cdr.(Retd.) H.T. Pitt, RN) and HMS Radiant (T/Lt. C.S.R. Shapland, RNVR). (2)

28 Jan 1944
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS Tuscarora (Lt.Cdr.(Retd.) H.T. Pitt, RN) and HMS Bretwalda (Skr. J.B. Henderson, RNR). (2)

1 Feb 1944
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with HMS Valena (T/A/Lt.Cdr. A. McKinlay, RNR). (2)

2 Feb 1944
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Campbeltown with aircraft. (2)

3 Feb 1944
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) shifted from Campbeltown to Rothesay. (2)

15 Feb 1944
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) departed Rothesay for Londonderry. She made the passage together with HMS Uther (Lt. A.A. Catlow, RN). They were escorted by HMS Kihna (A/Cdr.(Retd.) A.R.W. Sayle, RD, RNR). (2)

16 Feb 1944
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) arrived at Londonderry. (2)

18 Feb 1944
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Lough Foyle together with HMCS Morden (T/Lt. E.C. Smith, RCNVR), HMCS St. Catharines (Lt.Cdr. H.C.R. Davis, RCNR) and HMS Fennel (A/Lt.Cdr. W.P. Moffat, RCNVR). (2)

19 Feb 1944
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Lough Foyle together with aircraft and later with HMS Primrose (T/Lt. R.F. Pembry, RNR). (2)

20 Feb 1944
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Lough Foyle together with HMS Drury (Lt. N.J. Parker, RN) and HMS Calder (T/A/Lt.Cdr. E. Playne, RNVR). (2)

21 Feb 1944
with HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Lough Foyle together with HMS Drury (Lt. N.J. Parker, RN), HMS Burges (Lt.Cdr. H. Hill, DSC, RD, RNR) and RHS Kriezis. (2)

22 Feb 1944
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Lough Foyle together with HMS Volunteer (Lt.Cdr. J.E.R. Wilford, RNR), RHS Tompazis, HMS Orchis (T/Lt. B.W. Harris, DSC, RNVR), HMS Lavender (Lt. L.G. Pilcher, RNR) and HMS Buttercup (T/Lt. R.J. Jonckheere, RNR). (2)

23 Feb 1944
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Lough Foyle together with ORP Burza (Lt.Cdr. F. Pitulko) and FFS La Découverte. (2)

25 Feb 1944
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Lough Foyle together with HMCS Brandon (T/Lt. H.E. McArthur, RCNVR) and HMS Campanula (T/Lt. I. Bull, RNVR). (2)

26 Feb 1944
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Lough Foyle together with HMS Campanula (T/Lt. I. Bull, RNVR) and HMS Nasturtium (T/Lt. W.N. Bishop-Laggett, RNR). (2)

27 Feb 1944
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Lough Foyle together with HMCS Trillium (T/Lt. P.C. Evans, RCNR) and HMCS Woodstock (T/Lt. C.E. Wright, RCNVR). (2)

2 Mar 1944
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Lough Foyle together with HMS Shiel (Lt. H.P. Crail, DSC, RNR) (2)

3 Mar 1944
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Lough Foyle together with HMS Anguilla (T/A/Lt.Cdr. C. Morrison-Payne, RNVR). (2)

4 Mar 1944
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Lough Foyle together with HMS Anguilla (T/A/Lt.Cdr. C. Morrison-Payne, RNVR). (2)

7 Mar 1944
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Lough Foyle together with HMS Louis (A/Lt.Cdr. R. Johnston, RNR), HMCS Waskesiu (Lt.Cdr. J.P. Fraser, RCNR), HMCS Rimouski (T/Lt. R.J. Pickford, RCNVR) and HMCS Snowberry (T/Lt. J.A. Dunn, RCNVR). (2)

8 Mar 1944
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Lough Foyle together with HMCS Snowberry (T/Lt. J.A. Dunn, RCNVR), HMCS Forrest Hill (T/Lt. E.U. Jones, RCNVR), an unidentified vessel (we are unable to read the name in the log of HrMs O 9) and HMCS La Malbaie (T/A/Lt.Cdr. J.S. Davis, RCNVR). (2)

14 Mar 1944
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Lough Foyle together with HMS Tavy (T/A/Lt.Cdr. F. Ardern, RNR), HMS Swale (Lt.Cdr. J. Jackson, DSC, RNR), HMS Starwort (Lt. A.H. Kent, RNR), HMS Geranium (T/Lt. G. Wallace, RNR), HMS Londonderry (Lt.Cdr. L.B. Philpott, DSC, RD, RNR), HMS Louis (A/Lt.Cdr. R. Johnston, RNR), HMS Anguilla (T/A/Lt.Cdr. C. Morrison-Payne, RNVR) and HMS Petunia (Lt. R.M. Roberts, RNR). (2)

15 Mar 1944
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Lough Foyle together with HMS Vidette (Lt.Cdr. R. Hart, DSC, RN or Lt. P.J. Stoner, RN), HMS Goodall (Lt.Cdr. J.V. Fulton, RNVR), HMCS Midland (T/Lt. W.O.O. Barbour, RCNR) and HMS Swale (Lt.Cdr. J. Jackson, DSC, RNR). (2)

16 Mar 1944
HrMs O 9 (Lt. J.B.M.J. Maas, RNN) participated in A/S exercises off Lough Foyle together with HMS Walker (Lt.Cdr. A.N. Rowell, RN). (2)

20 Mar 1944
HrMs O 9 (Lt. R.W. van Lynden, RNN) participated in A/S exercises off Lough Foyle together with Mounsey (Lt. F.A.J. Andrew, RN). (2)

Submarine HNMS O 15 (N 15 / P 15)

19 Apr 1944
HrMs O 15 (Lt. J.B.M.J. Maas, RNN) and HMS Sunfish (Lt. H.J. Bartlett, DSC, RN) departed Dundee for Scapa Flow. They were escorted by HMS Loch Monteith (T/Lt. K.W. Richardson, RNR). (3)

20 Apr 1944
HrMs O 15 (Lt. J.B.M.J. Maas, RNN) arrived at Scapa Flow. (3)

21 Apr 1944
HrMs O 15 (Lt. J.B.M.J. Maas, RNN) departed Scapa Flow for Rothesay. She made the passage together with HMS Taku (Lt. A.J.W. Pitt, RN) and HMS Visigoth (Lt. J.R.H. Haddow, DSC, RN).

The submarines were escorted by the armed yacht HMS Cutty Sark. (3)

23 Apr 1944
HrMs O 15 (Lt. J.B.M.J. Maas, RNN) arrived at Rothesay. (3)

25 Apr 1944
HrMs O 15 (Lt. J.B.M.J. Maas, RNN) shifted from Rothesay to Campbeltown. (3)

27 Apr 1944
HrMs O 15 (Lt. J.B.M.J. Maas, RNN) conducted A/S exercises off Campbeltown with aircraft. (3)

28 Apr 1944
HrMs O 15 (Lt. J.B.M.J. Maas, RNN) conducted A/S exercises off Campbeltown with aircraft. (3)

29 Apr 1944
HrMs O 15 (Lt. J.B.M.J. Maas, RNN) conducted A/S exercises off Campbeltown with aircraft. (3)

30 Apr 1944
HrMs O 15 (Lt. J.B.M.J. Maas, RNN) conducted A/S exercises off Campbeltown with HMS Spaniel and HMS Boarhound (A/Ch.Skr. A. Keable, RNR). (3)

1 May 1944
HrMs O 15 (Lt. J.B.M.J. Maas, RNN) conducted A/S exercises off Campbeltown with HMS Camellia (T/A/Lt.Cdr. A.H. Lyons, RNVR) and HMS Charlock (T/Lt. J.E.B. Healy, RNVR). (3)

2 May 1944
HrMs O 15 (Lt. J.B.M.J. Maas, RNN) conducted A/S exercises off Campbeltown with HMS Spaniel and HMS Bedlington. (3)

3 May 1944
HrMs O 15 (Lt. J.B.M.J. Maas, RNN) conducted A/S exercises off Campbeltown with HMS Pelican (Cdr. J.S. Dalison, DSO, RN) and HMS Crane (Lt.Cdr. R.G. Jenkins, RN). (3)

5 May 1944
HrMs O 15 (Lt. J.B.M.J. Maas, RNN) conducted A/S off Campbeltown exercises with aircraft. (3)

7 May 1944
HrMs O 15 (Lt. J.B.M.J. Maas, RNN) conducted A/S exercises off Campbeltown with HMS St. Modwen (Lt.Cdr. J.M. Lycett, DSC, RNR). (3)

10 May 1944
HrMs O 15 (Lt. J.B.M.J. Maas, RNN) conducted A/S exercises off Campbeltown with HMS Radiant (T/Lt. C.S.R. Shapland, RNVR) and HMS Boarhound (A/Ch.Skr. A. Keable, RNR). (3)

11 May 1944
HrMs O 15 (Lt. J.B.M.J. Maas, RNN) conducted A/S exercises off Campbeltown with HMS Bretwalda (Skr. J.B. Henderson, RNR) and HMS L' Atlantique (Skr. C.A. Collins, RNR). (3)

14 May 1944
HrMs O 15 (Lt. J.B.M.J. Maas, RNN) conducted A/S exercises off Campbeltown with FFS Roselys and HMS Radiant (T/Lt. C.S.R. Shapland, RNVR). (3)

15 May 1944
HrMs O 15 (Lt. J.B.M.J. Maas, RNN) conducted A/S off Campbeltown exercises with aircraft. (3)

17 May 1944
HrMs O 15 (Lt. J.B.M.J. Maas, RNN) conducted A/S exercises off Campbeltown with HMS Boarhound (A/Ch.Skr. A. Keable, RNR) and HMS L' Atlantique (Skr. C.A. Collins, RNR). (3)

18 May 1944
HrMs O 15 (Lt. J.B.M.J. Maas, RNN) shifted from Campbeltown to Rothesay. (3)

22 May 1944
HrMs O 15 (Lt. J.B.M.J. Maas, RNN) shifted from Rothesay to Campbeltown. (3)

23 May 1944
HrMs O 15 (Lt. J.B.M.J. Maas, RNN) conducted A/S exercises off Campbeltown with HMS Boarhound (A/Ch.Skr. A. Keable, RNR) and another ship (can't make the name out in the log of O 15). (3)

24 May 1944
HrMs O 15 (Lt. J.B.M.J. Maas, RNN) conducted A/S exercises with off Campbeltown HMS Boarhound (A/Ch.Skr. A. Keable, RNR) and HMS Tuscarora (Lt.Cdr.(Retd.) H.T. Pitt, RN). (3)

27 May 1944
HrMs O 15 (Lt. J.B.M.J. Maas, RNN) conducted A/S exercises off Campbeltown with aircraft. (3)

28 May 1944
HrMs O 15 (Lt. J.B.M.J. Maas, RNN) conducted A/S exercises off Campbeltown with the Free French corvette FFS Commandant d'Estienne d'Orves. (3)

29 May 1944
HrMs O 15 (Lt. J.B.M.J. Maas, RNN) conducted A/S exercises off Campbeltown with aircraft. (3)

30 May 1944
HrMs O 15 (Lt. J.B.M.J. Maas, RNN) conducted A/S exercises off Campbeltown with the Free French corvette FFS Commandant d'Estienne d'Orves. (3)

31 May 1944
HrMs O 15 (Lt. J.B.M.J. Maas, RNN) conducted A/S exercises off Campbeltown with HMS Bretwalda (Skr. J.B. Henderson, RNR). (3)

1 Jun 1944
HrMs O 15 (Lt. J.B.M.J. Maas, RNN) departed Campbeltown for Londonderry. She made the passage together with ORP Dzik (Kmdr.ppor. (Cdr.) B.S. Romanowski) which came from Rothesay.

They were escorted by the British destroyer HMS Sardonyx (A/Lt.Cdr. T.A. Easton, RNVR). (3)

2 Jun 1944
HrMs O 15 (Lt. J.B.M.J. Maas, RNN) and ORP Dzik (Kmdr.ppor. (Cdr.) B.S. Romanowski) arrived at Londonderry, Northern Ireland where they were to participate in A/S exercises. (3)

6 Jun 1944
HrMs O 15 (Lt. J.B.M.J. Maas, RNN) conducted A/S exercises off Lough Foyle with HMS Pasley (Lt. P.G.R. Mitchell, RN). (3)

7 Jun 1944
HrMs O 15 (Lt. J.B.M.J. Maas, RNN) conducted A/S exercises off Lough Foyle with HMS Pasley (Lt. P.G.R. Mitchell, RN). (3)

8 Jun 1944
HrMs O 15 (Lt. J.B.M.J. Maas, RNN) conducted A/S exercises off Lough Foyle with HMS Pasley (Lt. P.G.R. Mitchell, RN). (3)

20 Jun 1944
While moored at Londonderry HrMs O 15 (Lt. J.B.M.J. Maas, RNN) is twice hit by two other submarines. Once by HMS H 34 (Lt. R.L. Jay, RN) and once by ORP Dzik (Kmdr.ppor. (Cdr.) B.S. Romanowski). (3)

11 Jul 1944
HrMs O 15 (Lt. J.B.M.J. Maas, RNN) conducted A/S exercises off Lough Foyle with aircraft. (3)

18 Jul 1944
HrMs O 15 (Lt. J.B.M.J. Maas, RNN) conducted A/S exercises off Lough Foyle with HMCS Kamloops (T/A/Lt.Cdr. D.M. Stewart, RCNR), HMCS Morden (T/Lt. K.B. Culley, RCNVR) and HMCS Chilliwack (T/Lt. D.R. Watson, MBE, RCNR). (4)

25 Jul 1944
HrMs O 15 (Lt. J.B.M.J. Maas, RNN) conducted A/S exercises off Lough Foyle with HMCS Wentworth (T/Lt.Cdr. R.J.C. Pringle, RCNVR) and HMCS Ville de Quebec (T/A/Lt.Cdr. H.C. Hatch, RCNVR). (4)

3 Aug 1944
HrMs O 15 (Lt. J.B.M.J. Maas, RNN) and HMS H 32 (Lt. I.M. Stoop, DSC, RN) both departed Londonderry (Loch Foyle) for Rothesay. They were escorted by the British armed yacht HMS Kihna (Cdr.(Retd.) T.J.T.C. Jenks, RN). (4)

4 Aug 1944
HrMs O 15 (Lt. J.B.M.J. Maas, RNN) arrived at Rothesay. (4)

Submarine HNMS Dolfijn (P 47)

5 Sep 1944
During her refit at Dundee, HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN), is undocked. (5)

1 Oct 1944
During her refit at Dundee, HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN), is docked again. (5)

Submarine HNMS O 9 (P 09)

2 Oct 1944
HrMs O 9 (Lt.Cdr. J.B.M.J. Maas, RNN) departed Rothesay for Dundee. She made the passage together with HrMs O 10 (Lt. S.H. de Boer, RNN). They were escorted by HNoMS Narvik. (6)

Submarine HNMS Dolfijn (P 47)

5 Oct 1944
During her refit at Dundee, HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN), is undocked. (5)

Submarine HNMS O 9 (P 09)

8 Oct 1944
HrMs O 9 (Lt.Cdr. J.B.M.J. Maas, RNN) arrived at Dundee. (6)

Submarine HNMS Dolfijn (P 47)

23 Oct 1944
Having completed her refit, HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN), conducted trials off Dundee. (5)

26 Oct 1944
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted trials off Dundee. (5)

30 Oct 1944
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted exercises with A/S aircraft off Dundee. (5)

31 Oct 1944
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted exercises with A/S aircraft off Dundee. (5)

1 Nov 1944
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted exercises with A/S aircraft off Dundee. (5)

3 Nov 1944
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted exercises together with HrMs O 9 (Lt. S.H. de Boer, RNN) off Dundee. (5)

7 Nov 1944
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted exercises with A/S aircraft off Dundee. (5)

8 Nov 1944
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted exercises with A/S aircraft off Dundee. (5)

9 Nov 1944
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted exercises with A/S aircraft off Dundee. (5)

11 Nov 1944
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted exercises off Dundee. (5)

12 Nov 1944
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted exercises off Dundee. (5)

16 Nov 1944
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted exercises with A/S aircraft off Dundee. (5)

20 Nov 1944
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted exercises with A/S aircraft off Dundee. (5)

21 Nov 1944
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted exercises with A/S aircraft off Dundee. (7)

22 Nov 1944
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted exercises with A/S aircraft off Dundee. (7)

23 Nov 1944
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted exercises with A/S aircraft off Dundee. (7)

24 Nov 1944
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted exercises with A/S aircraft off Dundee. (7)

25 Nov 1944
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted exercises with A/S aircraft off Dundee. (7)

28 Nov 1944
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted exercises with A/S aircraft off Dundee. (7)

29 Nov 1944
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted exercises with A/S aircraft off Dundee. (7)

30 Nov 1944
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted exercises with A/S aircraft off Dundee. (7)

1 Dec 1944
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted exercises off Dundee. (7)

2 Dec 1944
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted exercises with A/S aircraft off Dundee. (7)

5 Dec 1944
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted exercises off Dundee. (7)

6 Dec 1944
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted exercises with A/S aircraft off Dundee. (7)

7 Dec 1944
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted exercises with A/S aircraft off Dundee. (7)

13 Dec 1944
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted exercises off Dundee together with HMS Zodiac (Lt.Cdr. H.R. Rycroft, DSC, RN). (7)

14 Dec 1944
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted exercises off Dundee together with HMS Zodiac (Lt.Cdr. H.R. Rycroft, DSC, RN). (7)

15 Dec 1944
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) shifted from Dundee to Leith. She was escorted by HMS ML 229 (T/Lt. W.C.R. Walsh, RNVR). (7)

18 Dec 1944
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) shifted from Leith to Dundee. She was escorted by HMS ML 229 (T/Lt. W.C.R. Walsh, RNVR). (7)

23 Dec 1944
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) and HrMs O 24 (Lt.Cdr. P.J.S. de Jong, RNN) conducted exercises off Dundee. (7)

28 Dec 1944
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted exercises off Dundee together with HMS ML 229 (T/Lt. W.C.R. Walsh, RNVR). (7)

4 Jan 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) and HNoMS Utsira (Lt. S. Valvatne) departed Dundee for Lerwick. They were escorted by HMS Loch Monteith (T/Lt. W.E. Turner, RNVR). (8)

5 Jan 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) arrived at Lerwick. (8)

6 Jan 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) departed Lerwick for her 18th war patrol. She was ordered to patrol in the North Sea.

Later the same day Dolfijn developed engine problems. It was decided to return to Lerwick for repairs.

No daily positions are known for this patrol so no map can be displayed. (8)

10 Jan 1945
After engine repairs, HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN), departed Lerwick at 1000 hours to resume her 18th war patrol.

At 1545 hours, in position 60°01'N, 00°09'E, Dolfijn was attacked by a friendly aircraft with rocket projectiles. Dolfijn sustained moderate damage and was, once again, forced to return to Lerwick. When attacked Dolfijn was in an area covered by total attack restrictions. (8)

11 Jan 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) ended her 18th war patrol at Lerwick. (8)

12 Jan 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) departed Lerwick for Dundee. She was escorted by HMS Dulcibelle (T/Skr. C. Hankin, RNR). (7)

14 Jan 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) arrived at Dundee. (7)

2 Feb 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) departed Dundee for Lerwick. She was escorted by HMS Loch Monteith (T/Lt. W.E. Turner, RNVR). (8)

3 Feb 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) arrived at Lerwick. (8)

5 Feb 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) departed Lerwick for her 19th war patrol. She was ordered to patrol in the North Sea. The patrol was uneventful.

No daily positions are known for this patrol so no map can be displayed. (8)

16 Feb 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) ended her 19th war patrol at Lerwick. (8)

17 Feb 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) departed Lerwick for Dundee. She was escorted by HMS Loch Monteith (T/Lt. W.E. Turner, RNVR). (7)

18 Feb 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) arrived at Dundee. (7)

7 Mar 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted exercises off Dundee together with HMS Commodator (T/Skr. J.B. Davidson, RNR). (7)

8 Mar 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN), HrMs Zeehond (Lt.Cdr. Baron D.T. Mackay, RNN) and HrMs O 15 (Lt. R.W. van Lynden, RNN) conducted exercises off Dundee with each other. (7)

9 Mar 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted exercises off Dundee together with HrMs O 15 (Lt. R.W. van Lynden, RNN) and HMS Commodator (T/Skr. J.B. Davidson, RNR). (7)

12 Mar 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) departed Dundee for Lerwick. She was escorted by HMS Loch Monteith (T/Lt. W.E. Turner, RNVR). (8)

13 Mar 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) arrived at Lerwick. (8)

17 Mar 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) departed Lerwick for her 20th war patrol. She was ordered to patrol off the Norwegian coast, Feje area (north of Bergen). Only small vessels were sighted.

No daily positions are known for this patrol so no map can be displayed. (8)

31 Mar 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) ended her 20th war patrol at Lerwick. (8)

2 Apr 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) departed Lerwick for Dundee. She was escorted by HMS Loch Monteith (T/Lt. W.E. Turner, RNVR). (7)

3 Apr 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) arrived at Dundee. (7)

20 Apr 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) and ORP Dzik (Por.mar. (Lt.) A. Klopotowski) departed Dundee for Lerwick. They were escorted by HMS Ebor Abbey (T.Skr. G.H. Harwood, RNR). (7)

23 Apr 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) and ORP Dzik (Por.mar. (Lt.) A. Klopotowski) and their escort HMS Ebor Abbey (T.Skr. G.H. Harwood, RNR) arrived at Lerwick. Passage was delayed when the ships had to shelter in Taracliff Bay due to bad weather.

Later the same day all three ships departed Lerwick for Scapa Flow where they arrived the following day. (7)

24 Apr 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) arrived at Scapa Flow where she was to participate in A/S exercises. (7)

25 Apr 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted A/S exercises off Scapa Flow together with HMS Bermuda. (Capt. J.S. Bethell, CBE, RN), HMS Scourge (Lt.Cdr. C.G.H. Brown, DSC, RN) and HMS Carysfort (Lt.Cdr. L. St.G. Rich, DSO and Bar, RN). (7)

26 Apr 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted A/S exercises off Scapa Flow together with HMS Cleopatra (Capt. B.I. Robertshaw, CBE, RN), HMS Obdurate (Lt.Cdr. R.D. Franks, DSO, DSC, OBE, RN) and ORP Garland (Lt. K. Hess, ORP). (7)

27 Apr 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted A/S exercises off Scapa Flow together with HMS Cleopatra (Capt. B.I. Robertshaw, CBE, RN) and HMS Carysfort (Lt.Cdr. L. St.G. Rich, DSO and Bar, RN). (9)

30 Apr 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted A/S exercises off Scapa Flow together with HMS Obdurate (Lt.Cdr. R.D. Franks, DSO, DSC, OBE, RN). (9)

1 May 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted A/S exercises off Scapa Flow together with HMS Gorse (Skr. F.R. Brown, RNR) and HMS Provost (T/A/Lt.Cdr. R.B. Evans, RNVR). (9)

2 May 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted exercises off Scapa Flow together with HMS Trusty (Lt. W. St.G. Anderson, DSC, RNR). (9)

4 May 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) departed Scapa Flow together with HMS Venturer (Lt. J.S. Launders, DSO, DSC and Bar, RN). They were escorted by HMS Castlenau (T/Skr. G. Wood, RNR). (9)

5 May 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) arrived at Dundee. (9)

17 May 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted snorkel exercises off Dundee. (9)

21 May 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted snorkel exercises off Dundee. (9)

22 May 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted snorkel exercises off Dundee. (9)

28 May 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted snorkel exercises off Dundee. (9)

31 May 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted exercises off Dundee together with HrMs O 15 (Lt. Baron R.W. van Lynden, RNN) and HMS Ultimatum (Lt. P.D.C. Bennett, RN). (9)

1 Jun 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted exercises off Dundee. (9)

4 Jun 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted exercises off Dundee. (9)

5 Jun 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted exercises off Dundee. (9)

6 Jun 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted exercises off Dundee. (9)

7 Jun 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) is docked at Dundee. (9)

14 Jun 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) is undocked. (9)

20 Jun 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted trials off Dundee. (9)

21 Jun 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted exercises off Dundee. (9)

22 Jun 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted exercises off Dundee. (9)

23 Jun 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted exercises off Dundee. (9)

28 Jun 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted exercises off Dundee. (9)

29 Jun 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted exercises off Dundee. (9)

2 Jul 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted exercises off Dundee. (9)

3 Jul 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted exercises off Dundee. (9)

4 Jul 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted exercises off Dundee. (9)

6 Jul 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted exercises off Dundee. (9)

9 Jul 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted exercises off Dundee. (9)

10 Jul 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted exercises off Dundee. (9)

11 Jul 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted exercises off Dundee. (9)

12 Jul 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted exercises off Dundee. (9)

16 Jul 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted exercises off Dundee. (9)

17 Jul 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted exercises off Dundee. (9)

18 Jul 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted exercises off Dundee. (9)

19 Jul 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted exercises off Dundee. (9)

20 Jul 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted exercises off Dundee. (9)

21 Jul 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted exercises off Dundee. (9)

23 Jul 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted exercises off Dundee. (9)

24 Jul 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted exercises off Dundee. (9)

25 Jul 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted exercises off Dundee. (9)

26 Jul 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted exercises off Dundee. (9)

27 Jul 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) conducted exercises off Dundee. (9)

7 Aug 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) departed Dundee for Rotterdam. (9)

9 Aug 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) arrived at Rotterdam. (9)

6 Sep 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) departed Rotterdam for Dundee. (9)

8 Sep 1945
HrMs Dolfijn (Lt.Cdr. J.B.M.J. Maas, RNN) arrived at Dundee. (9)

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