The Tankers are the energy source for the Navy. Without them, the fleets would all become immobile, as the Japanese Navy found out during WWII.

Refueling at sea can be a precarious and arduous task and requiresexpert seamanship from both skippers for such a manouevre. But a steadycourse brings H.M.S Wave Sovereign along side H.M.A.S Sydney to commencerefueling in Korean waters.

Sydney will herself will pass on parts of her precious load to fleet fighting vessels in turn.