Hey 'WN',
I saw a prawn trawler do exactly the same thing in 'Sam's Creek' near Pt Samson, WA in '71......
The silly little men had it tied up 'tight' to the jetty on a 'full tide', and then 'retired' into the very local 'tinny club'....completely unawares that the tide was dropping at an 'alarming' rate,
as it does up there, and the heavy fibreglass trawler, (the 'Reliant'), firmly lashed to said jetty, simply pulled the whole jetty into the creek...on top of said trawler...!!!
Took them months to raise it, dry it out, rebuild said jetty.....
Oh Dear!!
So, I can imagine the scene......
Cheers
Apols for the 'drift'....if U get my drift......