Dear John,

I am not entirely sure of your exam question, but if I read you right, and if it was me, I would be using the Axel Niestle version as my baseline, viz:

Type V 80. GW, Kiel. Commissioned as V 80 (no “U” number) on 30 Sep 40

Type V 300. GW, Kiel:

U-791. Contract cancelled on 7 Aug 42 prior to keel laying

Type Wa 201 (Type XVII?). B&V, Hamburg:

U-792. Commissioned on 16 November 1943

U-793. Commissioned on 24 April 1944

Type Wk 202 (Type XVII?) GW, Kiel:

U-794. Commissioned on 14 November 1943

U-795. Commissioned on 22 April 1944

Type XVIIB. B&V, Hamburg:

U-1405. Commissioned on 21 December 1944

U-1406. Commissioned on 8 February 1945

U-1407. Commissioned on 29 March 1945

U-1408. Construction abandoned on 3 March 1945 (90% complete)

U-1409. Construction abandoned on 3 March 1945 (80% complete)

(Plus U-1410 to U-1416 - contracts cancelled)

Type XVIIG. GW, Kiel:

U-1081 to U-1092 - contracts cancelled

Type XVIIK. GW, Kiel:

U-798. Blown-up on 3 May 1945 before commissioning

Of all of these, only the 4 Type XVIIs (U-792 to U-795) and the 5 Type XVIIBs (U-1405 to U-1409) seemed to have attracted specific Allied attention via the TNC in 1945.

Does that make sense/help?

Yours aye

Derek