All three destroyers depth charged the U-boat and seconds after Firedrake released her depth charges , U-39 surfaced .
Following the failed attack , three British destroyers in the vicinity of the Ark Royal , HMS Faulknor , Firedrake , and Foxhound detected U-39 .
All three destroyers depth charged the U-boat and seconds after Firedrake released Firedrake 's depth charges , U-39 surfaced .
Following the failed attack , three British destroyers in the vicinity of the Ark Royal , HMS Faulknor , Firedrake , and Foxhound detected U-39 .