ロンボク海峡
"Guitarro" departed Fremantle 11 December 1944 on her fourth war patrol, transiting Lombok Strait 17 December to patrol the South China Sea. After putting in at Mios Woendi 17 January 1945 for repairs, she made an attack with undetermined results on a convoy off Cape Batagan. Finding targets scarce, she returned to Fremantle 15 March.