Asterion 's third cruise commenced on 4 May 1942 , from New York .
She sailed between Key West and Norfolk , proceeding as an independently routed merchantman or as a straggler from a convoy .
Asterion 's third cruise commenced on 4 May 1942 , from New York , and she sailed between Key West and Norfolk , proceeding as an independently routed merchantman or as a straggler from a convoy .