bour ▁and ▁set ▁explos ives , ▁and ▁then ▁returned ▁safely . ▁Four ▁ships ▁were ▁s unk . ▁ ▁August ▁ 1 0 , ▁ 1 9 4 2 : ▁The ▁Italian ▁sub marine ▁Sc ir è ▁was ▁s unk ▁by ▁HMS ▁Is lay ▁while ▁attempting ▁to ▁attack ▁the ▁port ▁of ▁Ha ifa ▁in ▁British ▁Palest ine . ▁She ▁had ▁ 1 1 ▁f rog men ▁on ▁board . ▁ ▁August ▁ 2 9 , ▁ 1 9 4 2 : ▁Off ▁El ▁D aba , ▁Egypt . ▁The ▁▁ ▁was ▁tor ped o ed ▁at ▁close ▁range ▁by ▁an ▁M TS M , ▁a ▁tor ped o - car ry ing ▁version ▁of ▁the ▁M TM . ▁Six ▁of ▁her ▁crew ▁were ▁lost . ▁▁ ▁was ▁to wed ▁to ▁Alexand ria , ▁but ▁soon ▁after ▁was ▁declared ▁a ▁" construct ive ▁total ▁loss ", ▁and ▁was ▁scra pped ▁in ▁ 1 9 4 6 . ▁ ▁December ▁ 4 , ▁ 1 9 4 2 : ▁The ▁Am bra ▁left ▁La ▁Spe zia ▁to ▁attack ▁Al gi ers , ▁carrying ▁f rog men ▁and ▁two ▁man ned ▁tor ped o es . ▁Ten ▁f rog men ▁carrying ▁lim pet ▁mines ▁sw am ▁with ▁the ▁man ned ▁tor ped o es , ▁but ▁because ▁of ▁the ▁distance ▁they ▁did ▁not ▁reach ▁the ▁har bour , ▁but ▁attacked ▁ships ▁outside ▁it , ▁s ank ▁two ▁and ▁dam aged ▁two ▁others . ▁ ▁December ▁ 1 7 , ▁ 1 9 4 2 : ▁Six ▁It