An anti-submarine net or anti-submarine boom is a boom placed across the mouth of a harbour or a strait for protection against submarines. Net laying...

An anti-submarine weapon (ASW) is any one of a number of devices that are intended to act against a submarine and its crew, to destroy (sink) the vessel...

The Sydney Harbour anti-submarine boom net was an anti-torpedo and submarine defence net that was in Sydney Harbour during World War II. It spanned the...

Anti-submarine warfare (ASW, or in the older form A/S) is a branch of underwater warfare that uses surface warships, aircraft, submarines, or other platforms...

A submarine's net cutter is a device mounted on the bows of some naval submarines to cut through anti-submarine netting. Some net cutters are powered...

goal of denying access to an enemy's ships: a modern example is the anti-submarine net. Booms have also been used to force passing vessels to pay a toll...

A net layer's primary function was to lay and maintain steel anti-submarine nets or anti torpedo nets. Nets could be laid around an individual ship at...

designed specifically to tackle fast-moving torpedo boats. An anti-submarine net and anti-boat boom was laid across the estuary from Cramond Island directly...

The United States Navy Net Depot Tiburon was a military facility charged with maintaining and deploying an anti-submarine net across the Golden Gate between...

water channel it became an anti-submarine net. At intervals along the net 200-ton lighters were stationed armed with anti-aircraft guns and searchlights...