British naval convoy system by G. H. Davis

The method of safeguarding the freedom of the seas: the British naval convoy system at work. Making the high seas safe for Allied and neutral shipping -- a convoy of merchantmen protected against submarines by destroyer screens, armed trawlers and minesweepers, and against surface raiders by a larger warship, while long-range flying boats scan the ocean from above

Convoy Destroyer Horace Merchantmen Method Minesweeper Minesweepers Minesweeping Neutral Protected Protecting Raider Raiders Safe Safeguarding Screens Seaplane Spread Submarines Sweeper Trawler Trawlers

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