WATER DROP ZONE PREJUMP TRAINING25-19. Prejump training for water jumps are conducted within 24 hours before the scheduled jump. If over 24 hours, an O-6 must give approval. This training includes demonstrations and practical exercises for all jumpers; use of the suspended harness is recommended.25-20. Prejump training includes, but is not limited to, the situations described below. The following points of performance for water jumps must be accomplished: Check body position and count. Check canopy and gain canopy control. Keep a sharp lookout during descent and maneuver to the indicated impact area. Prepare to land by turning and facing into the wind, maintaining position until just before landing. Prepare to land with a life preserver. Prepare to make a PLF (if water is shallow or ground contact is made). PLFs MUST be conducted during sustained Airborne training. Emergencies in the air. Emergencies in the water include the following actions: Ensure the life preserver is fully inflated. If trapped under the canopy, the jumper finds a radial seam and follows it to the edge. If trapped under the canopy, the jumper lifts their hand slowly and creates an air pocket to breath, then cuts a hole in the canopy material. (If the jumper lifts their hand too quickly, they will create a suction and the canopy will stick to their face and arm.) Wet silk training is completed and documented within six months prior to the jump (12 months for U.S. Navy personnel).