As for the fishing rod....
I'm very impressed with some of the ingenious things these folks build!! I also believe that building something, keeps their mind off the isolation. Idle hands, make a busy mind...
Most of the folks "hand lineing" seem to have a problem with a tangle of loose line at their feet. Or, the tangle getting caught up and dragged out... By building a rod, with some type of contraption for a reel, I think they are trying to eliminate that??
Hence the Beer can... (piece of wood?)
It acts like a simple bow fishing reel, providing tangle free line storage and retrieval...
They could throw it out in the morning, when the wind is calm, wedge it in the rocks, and let it set...
They could work on their shelter, gather wood, hunt and forage, while fishing. They could even set out several lines, like snares?? They could also leave them overnight, when fish tend to come into shallow water??
I like the show!!!