Sighting an armed trawler bearing down on her, the submarine dove.
Some nations still use armed trawlers today for fisheries protection and patrol.
North Korea has been notoriously known for its use of armed trawlers as spy ships.
They were joined for the voyage by two armed trawlers, plus a rescue ship and an oiler.
She was an armed trawler built for the Royal Navy.
The explosion killed 186 men, destroyed three nearby armed trawlers, and damaged nine more.
On 10 October, however, she took an armed trawler under fire and left it burning.
These were usually weakly escorted by only a couple of destroyers and armed trawlers.
They turned and started in the other direction, opening fire on an armed trawler in passing.
Later in the war he skippered armed trawlers and minesweepers.