Swim evaluation R.24 consists of: Swim-Float-Swim sequence - Participants must have a strong freestyle and/or breaststroke and be able to swim the 150yd continuously without stopping, 2 minutes of Treading Water (No Hands!), then a last 50yd - Participants must be able to tread water in a depth of 9 feet without using their hands for 2 minutes without stopping. Complete a timed event within 1 minute, 40 seconds: Starting in the water, swim 20 yards. The face may be in or out of the water. Swim goggles are not allowed. Surface dive, feet-first or head-first, to a depth of 7 to 10 feet to retrieve a 10-pound object. Return to the surface and swim 20 yards on the back to return to the starting point with both hands holding the object and keeping the face at or near the surface so they can get a breath. Candidates should not swim the distance underwater. Exit the water without using a ladder or steps.