 In February 1946 she towed the Type XXIII submarine , in company with the tug "Bustler" towing the Type XXI submarine , from Lisahally to Cherbourg for hand-over to the French Navy in "Operation Thankful".Once again towing problems in heavy weather forced her to take shelter, this time in Dublin Bay.In March "Tremadoc Bay" was deployed for training and emergency duties with Plymouth Local Flotilla.