Combat between two users at sea under certain circumstances is called a Vs. battle.
The rules in a Vs. battle are the same as with any naval combat.
There are four types of Vs. battles; battles in unsafe waters (with penalties), epic sea feuds (no penalties), bounty hunting, and mock battles.
Any user with adventure, trading, battle levels below 20 will not be attacked even in unsafe waters.
Bounties can be attacked even in safe waters.