Coachroof lines on H-30 and others
The two to starboard with no winch are probably the main halyards, primary and a spare. Do you have an adjustable gooseneck? --if so, the common practice is to peak the main by hand and then take up on it by drawing the boom's forward end down with a vang-like purchase to the base of the mast. This is desirable for many reasons and on smaller boats does not always require a winch. I changed Diana (a '74 H-25) to be like this but I still have the halyard winch too.Ed is correct: sailing protocol/tradition calls for headsail hal'ds to port of the spar and mains/courses to starboard. The third line is probably a spinnaker halyard or pole lift, or it could be the far end of a double-ended mainsail sheet. Consider adding a matching winch for the main halyards-- a 30 is not a dinghy and should need one to keep the luff properly tensioned.My boat came with one halyard winch to starboard of the hatch for single main and jib halyards (and the jib was to port of the main). I retrofitted a double-halyard masthead and have two lines to each side. (I still need to acquire two Lewmar 8's for the sheets and will move the 7's to the cabintop.)On Diana the spin. hal'd and pole lift are on the mast and tailed from up forward, so I have no 'third' lines running aft.I'd be suspicious of vintage 1983 rope for crucial halyards. Inspect all your halyards before raising the mast. They're a lot easier to replace and re-reeve when the mast is horizontal and the old halyards are still intact!JC 2