It is possible to escape the water with a wall jump when the water is low, or a crouch jump and down grab when it is high.

Requires:

{"doorUnlockedAtNode": 2},
{"or": [
  "canDownGrab",
  "canWallJump",
  "Gravity",
  "HiJump",
  "canTrickySpringBallJump"
]}

Unlocks doors:

{"types": ["ammo"], "requires": []}

Dev note: The crouch jump is not actually necessary but helps slightly. It is also possible to use the crouch jump while maintaining the flash suit.