All good info, thanks.
If you’re fishing with a Vexilar under 20 feet of water, I would use low power mode if your model has it. Fish can feel the sonar pulses if you blast them with normal power in a shallow area.
Interesting. I have the FL18 that does have low power mode but I’ve always used normal with bottom lock on. I’m going to have to switch to low power mode for my local lake that tops out at about 8 feet deep…