This is why I have so much respect for the builders of old and also why I feel that it is so important to keep their memory alive
For example, Garmin (one of the leading fish finder manufacturers) calls their down-imaging systems DownVu, while Lowrance uses terms like DownScan and SideScan. Meanwhile, Humminbird directly identifies their units as down-imaging or side-imaging
With its very large arbor, it retrieves 35 per revolution and has a massive drag strength of 55 lbs
Shimanos larger spool reels (the 14000-size models) lay line in tight, even coils that peel off cleanly on the cast
At high altitude, air pressure decreases, so pO 2 decreases accordingly, and in warmer and saltier water, the solubility of oxygen decreases, creating a lot of variation in how much oxygen is in different water bodies