HMS "Sussex" was an 80-gun third-rate ship of the line of the English Royal Navy, lost in a severe storm on 1 March 1694 off Gibraltar. On board were possibly 10 tons of gold coins. This could now be worth more than $500 million, including the bullion and antiquity values, making it one of the most valuable wrecks ever.
HMS "Sussex" sailed across the Mediterranean Sea at the beginning of the 18th century. 
HMS "Sussex" could not have sailed during the 18th century because it sank in 1694. Changing the format of the date from year to century made it more difficult for the system.