Yes when open air vents air come out and container fill water.
When blow air to containers water goes out and it come up.

System is "locked" like rails when the boat is on lift its
stable. Lake area no big waves, maybe 2ft but windy, it looks
to be fine, so much weight.

Spot lights and security camera..;)

Nice you guys like it :)

If you get a chance, post pics when boat is off the trailer.
Still, cool as hell! :)

When its down its floating and boat goes easier to rails.
When ride boat in rails it push system deeper in water.