ISBN: | 978-5-5108-9760-9 |
High Quality Content by WIKIPEDIA articles! The Black Swan class and Modified Black Swan class were two classes of sloop of the Royal Navy and Royal Indian Navy. Thirteen Black Swans were launched between 1939 and 1943, including four for the Royal Indian Navy; twenty-four Modified Black Swans were launched between 1942 and 1945, including two for the Royal Indian Navy; another five ships were cancelled in 1945.