Head through the opening and have Tulin activate the propeller.I know guides are kind of not well received here since the point of the game is exploration and not spoiling yourself and yada-yada. If placed correctly, it will cause the gear on the right to begin turning. It needs to be in close so its hitting two sides of the 'plus sign' on the right. Attach it on either side, as long as it's hitting both gears.

Grab the icicle with Ultrahand and carry it to the gears.Shoot an arrow at one of the large ones, and it will fall to the ground. Look towards the ceiling in this room, closer to the wall, and you'll find some icicles.Look at the wall and you'll find one gear here is turning, but the other is not. Walk around the corner and defeat the Soldier Construct.Head north and use Recall on the massive gear found here.Use a weapon to break the icicles that block the way and then head inside. Fall off the southeast part of the boat, and use the Paraglider to glide towards the window.Use Tulin to blow a gust of air into the propeller, causing the gear to turn. Climb the ladder and defeat the Soldier Construct.Use Recall on the gear to keep it moving and then climb up the ladder. Spin it around a few times and then release. While the gear is spinning, the nearby door opens, but as soon as it stops, the door will close. Then stand underneath the device and use Ultrahand to spin the platform around. Use Ultrahand to grab one and attach it to the bar. Nearby on the floor, there are a couple of platforms. Run around the corner and you'll find a gear on the ceiling with a bar hanging down from it.Defeat the Soldier Construct found here and then use the Ascend ability to get the upper part of this room.Use Tulin's Power of Wind to gust Link across the gap. From there, Link can head south to find a gap.Link can use the Paraglider to glide in from the open window, arriving at Wind Temple B1. Fall off the the boat at the west side, right at the center of the boat.Pull the lever with Ultrahand to open the gate

Subnautica below zero wiki walkthrough