Swim is a Hunter skill used to stay afloat in water rooms and avoid damage or death due to drowning, with higher proficiency in this skill reducing the risk.
Syntax: swim <direction>
In Game Description
Syntax: swim <direction> Ranger Skill: This skill reflects your ability to stay afloat in water, and thus avoid damage or death due to drowning. The higher your skill, the longer you will be safe in the water.