Fifth Patrol
The fifth war patrol began as Grayback sailed from Australia on 7 December 1942. Only a week out of port, Pharmacist's Mate Harry B. Roby was called upon to perform an emergency appendectomy, the second to be done on a patrolling submarine. With Grayback running a hundred feet beneath the surface, the untutored Roby successfully removed the infected appendix, and his patient was back standing watch by the end of the patrol. Then, on 25 December, Grayback surfaced to sink four landing barges with her deck guns. Four days later she was again fired on by an enemy submarine but maneuvered to avoid the torpedoes. On 3 January 1943 sunk I-18, one of 25 Japanese submarines destroyed by western submarines during the war.
On 5 January Grayback served as beacon ship for the bombardment of Munda Bay and also indulged in rescue work. Lying off Munda early in the morning of 5 January, she received word that six survivors of a crashed B-26 Marauder bomber were holed up on the island. Grayback sent ashore two men, then submerged at dawn to avoid enemy aircraft. The submariners located the downed aviators, three of whom were injured, and hid out with them in the jungle. As night fell, Grayback surfaced offshore and by coded light signals directed the small boat "home safe" with the rescued aviators. For this action skipper Edward C. Stephan received the Navy Cross as well as a Silver Star from the US Army.
Grayback continued on patrol, torpedoing and damaging several Japanese ships. On 17 January she attacked a destroyer escorting a large maru, hoping to disable the escort and then sink the freighter with her deck guns. However, the destroyer evaded the torpedoes and dropped 19 depth charges on Grayback. One blew a gasket on a manhole cover, and the submarine, leaking seriously, was ordered back to Brisbane where she arrived 23 February.
Read more about this topic: USS Grayback (SS-208)