[5][6] Submarines, including the highly advanced French boat Roland Morillot,[5][9] made simulated attacks against convoys and naval formations using dummy torpedoes.

Finally, motor torpedo craft of the Belgian Navy joined other Western Union warships to execute mine-sweeping operations in Weymouth Bay.

Later both naval surface forces combined in a simulated convoy - the aircraft carriers standing in for troopships - with Lancasters, Mitchells and Meteors as air cover.

Land based fighters and naval strike aircraft practiced attacks with cannon and rockets against the smaller ships and then against the main force of four carriers, the battleship Anson and supporting destroyers.

[10] One unusual example of allied cooperation involved the replacement of the outer wing of a Netherlands Sea Fury fighter aircraft that had been damaged by a bird strike.

Since the Royal Netherlands Navy did not provide such elaborate spare parts when the aircraft's group deployed to RNAS Culdrose, the damaged Sea Fury received a replacement wing with British markings.