We have planes, ships, and radar, but no defense against underwater attack!

They also were vulnerable to underwater attacks.

I submerged for an underwater attack and delivered a shot from Tube 1.

Started underwater attack, pushed into the escort and reached cruiser at 500 metres range.

An interior 20 mm thick torpedo bulkhead protected the ships' vitals from underwater attack.

These explosions were designed to simulate underwater attacks.

See Anti-frogman techniques for precautions against underwater attack.

The threat of an underwater terrorist attack is a concern to the maritime industry and port law enforcement agencies.

One possibility is that the torpedo was not detonated on command, but rather it malfunctioned because of some damage suffered during the underwater attack.

There until the 13th, she guarded the transports from enemy aerial and underwater attack.