That's not why sailboats head up
Thanks for the answer, Peggie. I didn't list the rule about making a signal, and I didn't realize that maintaining control of the vessel is an explicit rule. Though it makes sense that it is. I DID fault the sailboat for not having a watch. In most collisions, the first thing to ask is: Who wasn't paying attention. You write, "It's because the wind will catch the sail and send the boat --literally -- wherever the wind blows it that sailboats DO head up to raise and drop sail." That's not really the reason. You can control a boat quite well while a sail is raised or dropped. If you don't believe this, watch any sailboat race at the upwind mark or downwind marks. Even when not racing, a lot of sail changes are made without heading up.The reason we head up when raising or lowering the main, and sometimes the genoa, is to keep the SAIL under control. If you're not into the wind, the SAIL will blow sideways off the boom, making a mess, obscuring the helm's view, and likely getting caught up against something. Such as lazyjacks.