Launching a lifeboat with a portable slipway. 4:18 video.
https://www.youtube.com/watch?v=UxNESWB5pmo
Previously:
https://www.homemadetools.net/forum/...122#post157517
https://www.homemadetools.net/forum/...011#post125358
https://www.homemadetools.net/forum/...972#post125090
https://www.homemadetools.net/forum/...8241#post87066