Anti-submarine net

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An anti-submarine net used during WWII in Nova Scotia, Canada

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.

Examples of anti-submarine nets[edit]

Boom defence vessels were in use in the river Forth during WW2 and were moored in Leith harbour for maintenance and repair. One such vessel, the BV49, contained a number of diesel electric generators in the mail hold. Duckboards covered the steel deck of the hold which was awash with diesel and possibly other fuel, and the fumes were overpowering. Another ship about a mile away heard the explosion as BV49 blew up, apparently from a burner or welders spark. A number of men were very seriously injured.

See also[edit]