Abstract: A buoy assembly with a carbon fiber body may include a first unit including a hollow core rod, a weight provided on the core rod, and an anchor connection part formed on one side of the weight, a second unit including multiple interior sections made from carbon fibers that are arranged radially along an outer perimeter of the core rod to form a hollow interior barrel and multiple exterior sections made from carbon fibers that are arranged radially along an outer perimeter of the interior barrel to form a hollow exterior barrel, and a third unit including an elevator pole configured to move up and down through an upper end of the core rod, a lantern mounted on an upper end of the elevator pole, a gear assembly engaged with the elevator pole, and a maintenance chamber holding the elevator pole and the gear assembly.