Mast Climbing. This is probably overkill but I'm including it for completeness. The classic way to get to the top of the mast is to sit in a Bosun's chair and be winched up on a halyard. Unfortunately, given the chair, my weight, tools, etc, that is a 240 lb dead lift for the person on the winch. The Admiral cannot do it and getting a buddy to line up their schedule with mine is an issue. It is a lot of work.
I have a climbing rope that is tied off to the spinnaker halyard, This is raised to the top of the mast. The halyard is routed to one of the main winches, wrapped, cleated, and tied off.
I use the topping lift as a safety line. It is moved forward of the shrouds and tied off at the base of the mast. It helps if both the climbing line and topping lift have little slack. The topping lift runs through a winch next to the companion way, is cleated and tied off. I wear a climbing harness. A locking gate carabiner is attached to the harness. It has a loop of rope that is tied to the topping lift with a prusik knot. You can slide this knot up and down the line, but put weight on it and it will lock up. This is a completely independent safety.
I use a Bosun's chair with a back (don't get one with just a wooden seat - lean back and over you go). If your chair has a back, you can sit, take the air, and relax for a bit. A rope from a locking gate carabiner loops to an ascender. The carabiner connects to the chair and the ascender goes onto the climbing rope. I use the climbing rope as the ascenders can chew up a halyard.
A separate ascender is connected to stirrups that go around my feet. It is connected to the climbing rope below the chair ascender. To climb: stand in the stirrups, raise the safety line prusik knot, raise the bosun chair ascender, sit in the chair, raise my feet, raise the stirrup ascender to just below the bosun chair ascender. Repeat - many times. I move up just over a foot with each cycle. I'm a 68 yr old, bald, fat guy. Once I started, it took 14 minutes to climb the mast this morning. Anyone can do this; just take it easy. It isn't a race.
One can climb up and get down by oneself. I NEVER do that. To get down, the ascenders must be moved up the climbing line a few inches to get them to release. They then can be lowered. However, to get to the top of the mast and be able to look down at the top of the mast, I need to get the ascenders up against the knot connecting the climbing rope to the spinnaker halyard. Once you do this, you cannot release the ascenders to go down. To go down, the Admiral eases the spinnaker halyard around the main winch and "gently" lowers me to the deck. (Be sure you are on good terms with the Admiral before starting the climb). I need to slide the prusik knot on the topping lift down as we descend. You should keep the safety line with little slack (less than a foot). If the climbing line should part, you don't want to drop 240+ pounds two to three feet before the safety line becomes taught. Although the topping lift is rated at many hundreds of pounds, the sudden shock of the dead weight could cause it to part.