It's my understanding that the Trawler Captain uses 30X70 binoculars to identify every individual Herring before ordering the deck hands to capture it with a dip net.
So they must be very high quality I say, say.
Proud to associate with you all!
You guys are a scream.
In my days as a commercial fisherman, we inspected the fish ultrasonically from a distance and then if they seemed suitable, we lowered a line with somewhere between 50 and 100 baited hooks.
At the bottom of the line, was a note kindly informing the fish that they had been rated as number 1 quality and asked them to please bite the hook. We did this even for number 2 quality fish as we figured that would prop up their egos and they'd feel better about themselves.
This wasn't the most successful technique. I went on to other things. My partner had more brains and persistence and spent his life on wandering the Pacific Ocean from Alaska to New Zealand.
I did ask him about binoculars and he said that he'd tried the 30x70 Selsi's as well as the 30x80 Helios and found them both to be 30.75x and that was just too much magnification. Had they been 29.8x, they would have been acceptable.
Lacking 29.8x binos, he said he much preferred having an airplane spot the fish.
This story is more or less true with certain liberties taken to make it applicable to this thread.
These days his boat sets a line of hooks about 50 miles long.