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.