HMS Heartsease ( K15 ) HMS " Heartsease was a of the Royal Navy . She served with both the Royal Navy and the United States Navy during the Second World War , with the latter navy as USS " Courage . She then spent several years under a succession of names in civilian service . In 1957 she was chartered on behalf of Indonesian rebels to smuggle rubber , copra and " matériel " . The Indonesian Air Force intercepted and sank her off the coast of Minahasa in North Sulawesi in December 1958 . Construction and commissioning . " Heartsease " was originally to have been named HMS " Pansy " , but the name was changed prior to her launch . She was ordered on 19 September 1939 and laid down at the yards of Harland and Wolff , Belfast , Northern Ireland on 14 November 1939 . She was launched on 20 April 1940 and commissioned into service on 20 April 1940 . Wartime service . Convoy escort . " Heartsease " spent most of her early career escorting convoys through British waters . On 22 September 1940 she picked up 31 survivors from the Norwegian merchant which had been torpedoed and sunk by west of Ireland . On 15 October she rescued nine survivors from the British merchant SS " Thistlegarth " which had been sunk by west - north - west of Rockall . She was then called to the assistance of the inbound Convoy SC - 7 , which had come under attack from a U - boat wolfpack and was sustaining heavy losses . On arrival " Heartsease " was assigned to escort the damaged into port . On 23 December she collided with the Hunt class destroyer in the Irish Sea . Both ships were saved and towed into port . A subsequent enquiry placed the blame on the captain of " Heartsease " . American service . She was transferred to the US Navy on 3 April 1942 with Lt . Christopher Sylvanus Barker , Jr . USN commanding and renamed USS " Courage " . She patrolled the western Atlantic for most of her career as a United States ship , escorting convoys from as far north as Greenland to as far south as Argentina . From 24 January 1945 , she was stationed at Iceland . She was returned to the Royal Navy on 23 August 1945 , after the end of the war . Mercantile service . She was put up for disposal and was sold into civilian service on 22 July 1946 . She was renamed Roskva in 1951 , Douglas in 1956 and finally Seabird in 1958 . A Norwegian crew took her to the Far East as " Douglas " . In the latter part of 1957 a Chinese - Indonesian businessman , A . P . Lim , engaged her and her Norwegian captain to smuggle raw rubber from Sumatra to Johor on the Malay Peninsula and later to Singapore . Lim ' s client was the PRRI ( " Revolutionary Government of the Republic of Indonesia " ) right - wing rebel movement , which was smuggling rubber out of Sumatra to fund its rebellion against the Indonesian government of President Sukarno . Early in 1958 Indonesian forces defeated the PRRI in its main strongholds and ports on Sumatra , reducing its rebellion to a residual guerilla war . However , the PRRI was allied with the Permesta rebel movement in North Sulawesi , which was supported by Taiwan . In December 1958 " Douglas " , now renamed " Seabird " , smuggled a cargo of small arms , ammunition and M20 recoilless rifle s from Taiwan to Bolaang Bay on the coast of Minahasa . There she began to load a cargo of copra , which Permesta was smuggling out of Minahasa to fund its rebellion . However , before she could start her voyage the Indonesian Air Force found " Seabird " and sank her . " Seabird " was announced missing in December 1958 and a month later she was declared lost in the Celebes Sea , with the cause of her loss officially declared as " unknown " .