On Scenic they said 24 hours - ie put it out in the morning and it would be back next morning - but the 2 times we did it , it was back that afternoon.
Coffin Bay, is on West Coast of SA. as am I, but I'm not that far west.
You might think so named because of tragic tale of shipwreck, mutiny etc.
Nope - just named after someone whose surname was Coffin. 😉