On Monday, July 27, 2020 at 6:01:28 AM UTC-7, Eric Greenwell wrote:
Charles Longley wrote on 7/26/2020 11:33 PM:
I would think land gear up. It might float indefinitely. Depends on how much foam/wood is in it. I would certainly try and get out as quick as I could.

I'm not sure the advice is in the ASW20 handbook, as I haven't read one for 30
years or so, but it is in my ASH26E handbook: water landings should be done with
the gear extended to reduce the tendency of the glider to dive into the water, and
to absorb the shock of hitting the bottom of the lake in shallow water.

--
Eric Greenwell - Washington State, USA (change ".netto" to ".us" to email me)
- "A Guide to Self-Launching Sailplane Operation"
https://sites.google.com/site/motorg...ad-the-guide-1

This is from my ASH31 flight manual:

A landing on water of a plastic sailplane with landing gear retracted has
been tested. Due to the experience gained on that occasion it is supposed, that the aircraft will not skim across the water, but that the whole
cockpit area will be pressed under the surface. If the depth of the water
is less than 2 m = 6.5 ft, the pilot is in the greatest danger. Touching
down on water is, therefore, recommended only with landing gear lowered, and as the only way out.