Crouch jump while holding shot to jump high enough to grapple horizontally to the second-lowest block. then fall, aim diagonally up, and grapple to the opposite wall after moving close enough to it, repeating this until Samus is above the water line. Grappling the same wall is also an option: in this case Samus will already be facing the wall when falling, so simply hold angle up and fire Grapple again immediately when Samus begins to fall; if done quickly, Samus will climb up to the next Grapple block.

Requires:

"Grapple"
"canTrickyCarryFlashSuit"