"Battle Stations--Gun Action " Ensign Charley Jason, a Reserve officer faces the searing experience of submarine warfare in the Pacific. When a Fleet type submarine went to war in the Pacific it operated mainly on the surface, attacking convoys at night, always heavily escorted as well as single vessels, rescuing downed fliers during intense air battles and shooting up enemy trawlers, junks, fishing boats and sampans. Often it had to fight to rescue downed pilots with the submarine at total risk during such daytime actions.