I did the Mountbatten Course at least twice and was privileged to experience both the "dragging along by my parachute" and the "assisted jump" into the greatly aerated rooster tail of the motor launch. I agree with the previous poster who stated the worryingly long time to resurface. We were taken out a few hours after the passing of a force 6 gale and the sea state very rough just outside Plymouth Sound. The Whirlwind helicopter duly arrived to winch us but was called away on a shout. By the time it returned, some of us were close to getting shipwrecked on the rocks and too close for the launch to get to us. I was last to be picked up because I deflated the dinghy canopy and began paddling away from the rocks as hard as I could. All good fun to look back on, but quite a worry at the time.