Allied Warships
USS Block Island (ii) (CVE 21)
Escort carrier of the Bogue class

USS Block Island shortly before her loss.
| Navy | The US Navy |
| Type | Escort carrier |
| Class | Bogue |
| Pennant | CVE 21 |
| Built by | Seattle-Tacoma Shipbuilding Corp. (Seattle, Washington, U.S.A.) |
| Ordered | |
| Laid down | 19 Jan, 1942 |
| Launched | 6 Jun, 1942 |
| Commissioned | 8 Mar, 1943 |
| Lost | 29 May, 1944 |
| Loss position | 31.13N, 23.03W (See a map) |
| History | On 29 May 1944, U-549 slipped undetected through the screen of the hunter-killer group TG 21.11, formed around the USS Block Island (CVE 21) and fired at 20.13 hours three T-3 torpedoes on the carrier, one or two of them struck and caused her to sink northeast of Canary Islands in position 31º13'N, 23º03'W.
At 20.40 hours USS Barr (DE 576) was damaged by a Gnat in the stern and a second Gnat missed the USS Eugene E. Elmore (DE 686). But the U-boat was then attacked and sunk by the latter destroyer escort and USS Ahrens (DE 575). Hit by U-boat |
| Noteable events involving Block Island (ii) include: 28 Oct, 1943 17 Mar, 1944 19 Mar, 1944 6 May, 1944 |
