[header] How to tie fenders on a boat [title] Use at least 3 fenders on your boat. [step] 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. 
[title] Place 1 fender at the widest part of the boat. [step] 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.