This release includes rules for Yacht Sea!, a maritime-themed game (specifically the scoring sheets and gold "treasure" dice) based on Yahtzee and additional rules for playing Ship, Captain, Crew.
From the publisher (both descriptions):
Yacht Sea!: The object of the game is to collect as many points as possible by rolling certain combinations with five dice. A player may throw the dice up to three time during their turn. After each roll, the player chooses which dice to keep and which to roll again. The player must put a score or a zero into a score box after each turn. The player with the most points at the end is the winner!
Ship, Captain, Crew: Played with five dive, the object is to roll a Six (Ship), a Five (Captain, and a Four (Crew) while trying to get the highest score possible by adding together the sum of your remaining two dice (The Ship's Cargo).