When we buy new device such as Humminbird RF15 we often through away most of the documentation but the warranty.
Very often issues with Humminbird RF15 begin only after the warranty period ends and you may want to find how to repair it or just do some service work.
Even oftener it is hard to remember what does each function in Fish Finder Humminbird RF15 is responsible for and what options to choose for expected result.
Fortunately you can find all manuals for Fish Finder on our side using links below.