noun. A system for determining the position of survivors lost at sea by which an explosion is set off underwater, the time needed for the waves to reach three different locations is calculated, and the position of the explosion is ascertained by triangulation.

noun. A system for determining the position of survivors lost at sea.

"I never bought the love of Mother Russia bit, only in sofar as Philby (and others, like Lucchino Visconti for example) used their supposed “communism” to get cred for being anti-establishment, angry young men."