Alternative form of defence in depth

(military) A strategy that seeks to delay rather than prevent the advance of an attacker, potentially yielding a limited amount of territory in order to stress the attacker's logistics and reduce their momentum.

plural of defence in depth

plural of defense in depth

plural of focal depth

plural of Secchi depth

A measure of the turbidity of a body of water; the depth at which a Secchi disk is no longer visible.

(nautical) The depth at which a submarine's pressure hull will collapse under external water pressure, causing the submarine to implode.

(nautical) The maximum depth at which a submarine is designed to be able to operate safely.

plural of operating depth