(which is of little use to anybody but a glider pilot trying to catch thermals)
When you're out of gliding distance of land, and the engine quits, the sea is the same everywhere - wet and cold. If there are no ships nearby which might be able to rescue you, you'd better try to maximize your time in the air (minimum sink) so you can get the mayday out, with a position report as accurately as possible, so that the SAR helicopter is on its way before you splash.