At the start of each contest, each crew receives a set of maps featuring the location of buried treasure, which they must race to retrieve.
In addition to battling on land, players will need to take extra care of their ships, which can now receive damage to their wheel, capstan and mast.
Between matches, players can spend downtime mingling in the Sea Dogs tavern, exploring, drinking and chatting with other challengers while seeking a contest.
The Anniversary update will also kick off a series of Tall Tales, a collection of narrative adventures that can be played solo or with a crew.
Beginning with Shores of Gold, they’ll introduce new characters, locations and gameplay features.
Additionally, a new trading company called The Hunter’s Call will provide fresh means to progress towards Pirate Legend, plus gold and cosmetic rewards, in return for players mastering new fishing and cooking capabilities.