How to build a water lander that can move?

I've build several landers that can safely splash down in water (on moons like Laythe, for instance). However, they cannot move around. The lander is basically a standard rover, with a lot of RCS. Unfortunately, RCS does nothing in water.

What kind of engines or tricks should I use to make a water rover?


here is detailed a mission on laythe

it used a water tug to assemble station pieces.

check out

  • the tug engine configuration and floating technique
  • the individual base components floating technique