Setup Problem #6
No numeric navigation data on the fish-finder screen on combination fish-finder/GPS units.
No matter how large a combo unit is, when you start splitting into multiple screens, it gets tough to see detail. Most of us like to fish with the fish-finder screen front and center, but fish finders left to the initial setup don't always show the basic numeric data you need at all times, like SOG and COG.
Unless your unit is ancient (read: more than five years old) or cheap, you can customize the fish-finder screen by adding some more data boxes. Place them in a little-used area of the screen, like the lower left corner, and they won't interfere with your view of the fish one bit. You may need to reach for the instruction manual to get the job done, but once you save the setup, you won't have to go through the process again. Then you'll be able to utilize the entire screen for fish finding instead of splitting it up.
Will it be a bit of a pain to set up your units to show all these things? Probably. Will it take a little time and effort? Sure. But not nearly as much as learning how to whiz with precision aim in an impaired virtual world - and the rewards are a heck of a lot bigger.