I don't have the rulebook with me since the game is with my friend. But according to him (a veteran), the white faction Mech ability have a "Submerge" which allows them to move to/from lakes.

I wanted to know how exactly does this work. In his opinion, it takes 3 turns. One to get onto the lake. One to move between lakes. One to jump onto an adjacent piece of land.

Is this right? The blue faction can skip across lakes on the same turn and immediately get to other areas and black have the ability to go from any mountain into a tunnel without needing a mine. So if I could get some clarity or at least the page on the rulebook where I can prove this, if I'm right and since he has the game, the next time we sit to play so that my favourite faction isn't deterred