If you are unable to watch this video you can see it here
This is the technique for assembling the Stasha in the water. Launch both
Climb into the more buoyant front, pull the rear towards you and
slot in the two lower bolts, shift your weight forward a little to keep the
section in place and then just add the two top bolts and do up with the wingnuts.
This film is at double speed so it takes about 30 seconds in real time to
join the two halves.
Assembling in the water