the safest way
The safest way to re-center the boat to the trailer, Ken, is to re-float the boat. I put the plastic "goal posts" onto my ancient trailer with reflective tape (red for the stern facing and one red and white strip all around that mark pretty much where the water level should be to float the boat back on -visible from the vehicle even in the waning hours of daylight) and have the posts just about touching the boat when centered. Your Bow eye might also be a bit low and not easily go past the V at the winch when recovering. My solution was to bring the boat in to that point; secure the winch; back in another half foot or so-depending on steepness of the ramp; finish winching up to the V and then drive out. This will not guarantee that the boatwill be square on the V for the keel(I assume your Mac 21 is the same swing keel as my V21)and you may need another person to make sure it doesnt swing on a choppy day or strong current - when recovering single handed, I once resorted to lashing the portside to the trailer to keep the drift to starboard at a minimum until i could pull clear of the water. Always look underneath when you are clear of the water to see if the keel is "close enough" before pulling away. I also let the keel down onto the V rest when trailering or laid up to reduce strain on the keel winch, cable, and surrounding structure of the boat. Hope this helps...
