| Navy | The Royal Navy |
| Type | Submarine |
| Class | T |
| Pennant | N 45 |
| Built by | Vickers Armstrong (Barrow-in-Furness, U.K.) |
| Ordered | |
| Laid down | 15 Mar 1940 |
| Launched | 14 Mar 1941 |
| Commissioned | 30 Jul 1941 |
| End service | |
| Loss position | |
| History | Sold to be broken up for scrap in January 1947. Scrapped at Milford Haven in July 1947. |
Commands listed for HMS Trusty (N 45)
Please note that we're still working on this section.
| Commander | From | To | ||
| 1 | Lt.Cdr. William Donald Aelian King, DSO, DSC, RN | 15 Mar 1941 | Apr/May 42 | |
| 2 | Lt.Cdr. Edward Francis Balston, DSO, RN | Apr/May 42 | 10 Oct 1943 | |
| 3 | Lt.Cdr. (retired) John Robert Garstin Harvey, RN | 10 Nov 1943 | 1 Mar 1944 | |
| 4 | Lt. Michael Frederic Roberts Ainslie, DSC, DSO, RN | 1 Mar 1944 | Apr 1944 | |
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Noteable events involving Trusty include:
4 Dec 1941
At 1217hours HMS Trusty (Lt.Cdr. W.D.A. King, DSO, DSC, RN) makes a torpedo attack on ' what is identified as ' an Italian Grecale-class destroyer west of Zakynthos island, Greece in position 37º46'N, 20º25'E. All torpedoes fired however missed their target. The attack was most likely against the Italian torpedo boat Orsa.
HMS Trusty is often credited with the sinking of the Italian merchant Eridano (3586 GRT) but this ship was sunk by HMS Perseus.
4 Jun 1942
HMS Trusty (Lt.Cdr. E.F Balston, DSO, RN) torpedoes and sinks the Japanese merchant cargo ship Toyohashi Maru (7031 GRT, built 1915) in Strait of Malacca in position 07º14'N, 98º06'E.
At 2300 hours (time zone -6) on 3 June 1942, while in position 10 nautical miles bearing 230 Pulo Raja, HMS Trusty sighted smoke from 2 ships bearing 020. At 2315 hours Trusty dived to attack.
At 0030 hours on 4 June 1942 Lt.Cdr. Balston fired four torpedoes at the leading ship. Two hits were obtained and the target was seen to settle on an even keel slightly down by the head. The second ship, half a mile astern of the first ship, made a 180 degree turn before it could be attacked and fled the area zig-zagging wildly.
At 0054 hours the first ship sank as a result of the two torpedo hits. Trusty surfaced four minutes later and attempted to get ahead of the second ship which was in sight about 4 nautical miles to the northward.
At 0200 hours another ship was sighted and Lt. Balston broke of the chase to close this ship.
At 0207 hours Trusty dived to attack.
At 0246 hours Trusty surfaced to attack with the deck gun. 6 rounds were fired before the enemy returned the fire. Also another ship not sighted before opened fire. Lt.Cdr. Balston broke of the attack. (see map)
18 Nov 1942
HMS Trusty (Lt.Cdr. E.F. Balston, DSO, RN) torpedoes and damages the Japanese troop transport Columbia Maru (5617 GRT) near Penang, Malaya in position 06º21'N, 99º05'E. (see map)