The sand does not impede Samus in G-Mode.

Entrance condition:

{
  "comeInWithGMode": {
    "mode": "any",
    "morphed": false
  }
}

Requires:

"h_navigateUnderwater"
{
  "or": [
    "Gravity",
    "HiJump",
    "canSpringBallJumpMidAir",
    {
      "and": [
        "h_underwaterCrouchJumpDownGrab",
        "h_storedSpark",
        {
          "shinespark": {
            "frames": 6,
            "excessFrames": 5
          }
        }
      ]
    }
  ]
}

Dev note: Only the last jump needs any items.