By August 13th, 1943, Ocean Breaker would return to the Atlantic, and Operation Ocean Tsunami was put into effect immediately by the Royal Navy, and Ocean Breaker would immieadeitly fall into the that Alexander Hillsborough had predicted. Ocean Breaker would be lured out towards the North Atlantic, where she would eventually find herself surrounded and ambushed by hundreds of Royal Navy ships. At first Ocean Breaker was able to hold back multiple attacks by the Royal Navy sinking dozens of the smaller ships while also dethatching her submarines in order to act as an ultimate undersea weapon to be used against the Royal Navy resulting into even more damage being inflicted, however at one point during the 6th Hour of the engagement, the British Heavy Battleship the HMS London.