Talus MB-764 amphibious tractor designed to launch and recover inshore lifeboats.
https://s3-us-west-1.amazonaws.com/h...r_fullsize.jpg
Previously:
https://www.homemadetools.net/forum/...898#post171473
https://www.homemadetools.net/forum/...011#post125358
https://www.homemadetools.net/forum/...8241#post87066
https://www.homemadetools.net/forum/...972#post125090
https://www.homemadetools.net/forum/...109#post168661