Related Clues:
- Depth-charge target of WWII
- Raider in the battle of the St. Lawrence
- Missile dropper drops odd bits amid confusion
- Depth charge target of WWII
- Undersea weapon
- "Das Boot" vessel
- Naval weapon
- German WWII threat
- Take pool exercise
- Sub about to appear with Nos 1 and 3 swapping places
- Disturbed about threat to wartime shipping
- Fuss about mature, currentless electric ray
- Mount exercises and cause ruin
- German WW 2 sub
- Anti-ship weapon