Swimming skill

Swimming is a skill in Deus Ex that determines oxygen duration and swim speed while underwater. Like all skills, swimming can be leveled up by spending skill points.

Effects
Each skill level increases oxygen duration and swimming speed.

Oxygen duration is increased by applying a multiplier to the base oxygen duration. The base oxygen duration without Aqualung is 20 seconds. Aqualung changes the base oxygen duration to 30, 60, 120, and 240 seconds (from tech 1 to tech 4, respectively). The swimming skill multiplied is then applied to the oxygen duration modified by Aqualung. Therefore, the combination of tech 4 Aqualung active and master skill level results in a total oxygen duration of 600 seconds (10 minutes).

The swimming skill is the only means for increasing swimming speed. The actual movement velocity within a water zone is 30% of the "water speed" attribute listed above, i.e., 90, 135, 180, and 225, from untrained to master. For comparison, running on land has a default velocity of 320.