A fish finder is a tool that uses sonar to detect fish in the water. It can be used to find fish in both fresh and salt water. Most fish finders have a transducer that emits sound waves and a receiver that picks up the echoes of those sound waves. The receiver then displays information about what it has detected on a screen.
Some people wire their fish finders directly to the battery while others use an extension cord. There are pros and cons to each method.
Wiring your fish finder directly to the battery means that you don't have to worry about losing power if something happens to the extension cord. It also means that you can put the fish finder anywhere on the boat, without having to worry about where the outlet is. However, wiring your fish finder directly to the battery can be tricky and it's important to make sure that you do it correctly so that you don't damage either the fish finder or the battery.
Using an extension cord gives you more flexibility when it comes to where you put your fish finder on the boat. You can also easily unplug it and move it around if necessary. However, if something happens tothe extension cord, you will lose power to yourfishfinder until you can replace or repairthe cord .