Good question
First, you have to buy a bosun's chair. Don't get the el cheapo version, it's uncomfortable. I wouldn't buy the most expensive one either, it's more appropriate for people who go up often.Choose a halyard that goes all the way to the top, this is usually the mainsail halyard. Shackle this halyard to the bosun's chair, load the halyard on a winch, and find someone strong enough to crank you up. Make sure you have a plan if you get an override or have other troubles with the halyard or winch.If you don't have self-tailing winches, you need someone to tail. It's dangerous for one person to crank you up without a tailer.I ALWAYS rig a second safety line. I use either the topping lift or the jib halyard. Shackle the safety line to your chair and load it on another winch or lead it to a cleat.If you have only one person helping you, they'll have to crank you up for a while, then go tighten and secure the safety line. If you have two people, then it goes faster.Before you go all the way up, practice going up a little way and then coming down. Make absolutely sure that your ground crew can get you down as well as they can get you up.This sounds like a lot of stuff to do, but I enjoy my trips up when I know that I am really safe.Help out by climbing when you can.Choose a calm day for your first ascent.Good luck and enjoy the view.Paulsv Escape Artisth336