depth bomb

This depth-bomb, by the way, is a wonderful invention, and with its perfection began the great decrease in submarine losses.

And at the proper moment the commander, standing tensely on the bridge, released a depth-bomb from its fixed place.

The depth-bomb was known before it was employed as one of the most effective weapons against the submarine.

An explosion as powerful as that of a depth bomb near it, is almost certain to cripple it if not destroy it.

A blue-black streak of silver, he appeared to hang in air, then, like a depth-bomb shot downward.