Thoughts
Bob -My first comment would be to recommend you do not even try this without someone who's done it before. There is a lot of potential to go wrong, but nothing should if you're careful.The fin keel O25 should have a draft of 4'6". You are therefore going to want about 5 feet of water so that little waves don't drop the boat on the ramp. Its not a big deal in the mud, but asphault is unforgiving. At the least, its tough on your bottom coating. Does you trailer have a tounge extension? If so, its a relatively simple matter of lining up the trailer, chocking the wheels, adding the extension and then having someone back the rig into the water after you climb aboard. Have your engine mounted and in position (assuming its outboard?), and your fenders out. Have you driver back the rig down until the engine is sufficiently submerged to get it running, but the boat is still firmly on the trailer. Then warm up the engine. Back in the rest of the way, put the engine in reverse, and back off.If you don't have the trailer extension, the operation is similar, but your driver will have less positive control as s/he backs the rig into the water because the trailer will be held by line or wire, and if the wheels catch on something on the ramp you may have a snag. You'd think the weight involved would roll over anything, but on our ramp there is a break between the pavement and the cement portions of the ramp and it can be a problem. If you're going to use this method, make absolutely sure your line is strong enough, and that your fittings are up to the task. One local guy who trailer launches his J24 has a winch mounted on his truck so that he can lower the trailer into the water under even better control.The tricky parts come if there is any wind or wave action. What you really want to do is back in and get off that trailer as quickly as you can safely go so that you don't drift sideways into the beams or get pounded on the bottom. This doesn't mean driving down the ramp quickly, but it does mean not fooling around.Make sure your tow vehicle is rated to pull a lot more than the anticipated weight of the boat, because pulling the boat and trailer up a steep ramp with lots of resistance is not a simple thing.One thing some people do around here at quiet times is to use the tide to help out. Casco Bay has tides around eight to twelve feet. This means that if you park the trailer on the ramp at low tide, you can just float right off, then recover the trailer at the next low. Do this once or twice and you'll figure out exactly how low the water need to be to back down into. Then you do just far enough in advance of high-tide to let you back in, and have the shortest possible interval until you can pull the trailer out. Make sure you have really good chocks on the trailer before you pull the tow vehicle out. This is the preferred method on our ramp, but obviously can only be done early or late in the season, or in the middle of the night.All that said, I'd pay to have it done.Whatever you do - be careful and good luck!Justin - O'day Owners' Web The trick