* The most difficult lock to create.
* The boat's inventory window must be closed to attach or remove a boat lock, otherwise the option to ''Lock'' or ''Unlock'' won't appear.
* The option to lock will not appear if the lock is heated, cool it first.
* To attach a boat lock, activate the lock, right-click the boat, and select ''Lock''.
* To remove a boat lock, activate the correct key, right-click the boat, and select ''Unlock''.