Convoy HX11 is an example of a convoy escorted by submarines. In this case it was two French subs. See http://www.warsailors.com/convoys/hx11.html .
Nemo
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"I'm afraid there is no disguising the fact that King's obsession with the Pacific and the Battle of Washington cost us dear in the Battle of the Atlantic".
Sir John Slessor GCB, DSO, MC, DL
AOC-in-C Coastal Command RAF
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