Replace Main Halyard
If one halyard breaks and rest are same vintage, then assumption must be all are in near-same condition, ergo, unreliable and unsafe.Replace your main halyard with a new one by coupling end of new with end of hold using a S-shaped bent paper clip so both ends will grip with a couple turns of electrical tape to secure. Then pull old halyard by snap shackle end first out of mast, threading new halyard up thru mast and out top sheave til it comes back to deck. Splice new snap shackle in new halyard end. Then, use that halyard to go to top of mast to retrieve old halyard. While up there, do same procedure with new genoa halyard and you're done.Welcome to Stick Climbers of America!!