Use a ladder.
Tim: I use a 24 foot extension ladder to climb to the top of the mast, its just as easy as climbing up to the roof of your house. Tie your halyard to the top rung of the ladder and place the base of the ladder on the cabin top and tie it off to the grab rails than snug up and cleat the halyard. Now you are ready to take the easy way to the top of the mast. It's hard to tell which bulb to buy since most C22's came from the factory without anchor lights, meaning your light could be any style.Barry Broyles C22 # 1909 "Brighteyes"