Stern, George "Masters' Conference"

World War 2 focused short story, set during a British coastal convoy. An astute Welsh ship captain uncovers sabotage by a renegade Scandinavian skipper who on earlier convoys had rather iingeniously signaled German bombers as to the exact convoy position of tankers carrying fuel oil vital to Britain’s defense effort. The Scandinavian captain receives a (fatal) dose of his own medicine at the hands of his erstwhile employers while the rest of the convoy reaches port safely.