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How to tie fenders on a boat
Use at least 3 fenders on your boat.
A boat should have at least 3 fenders tied to it to protect it efficiently, more always being a good option. You can follow the guidelines of having 1 fender per 10 feet (300 cm) of waterline while also always having a minimum of 3 fenders.
Place 1 fender at the widest part of the boat. The widest part of your boat is the part that will bump into something first along the sides, so you definitely want to place a fender at this section.