Gene&Mary":2djnw7s2 said:
Besides the tie downs at the bow, the loose safety chain and the winch connection, and the two tie down straps at the stern, what other tie downs are used to secure the boat to the trailer?
Normally there is a "winch strap" from the reel winch on the trailer. This should be kept tight. The "safety chain" is what keeps the bow from rising, and from going forward. It should not be "loose". Some trailers have a plate which the links are stopped by,-- some have a turn buckle. Some also use a ratchet, or lever strap, to keep the bow down.
There are several ways to strap down the boat in the stern area--and strapping it down there is essential. If you have ratchet or lever straps there that go into the stern eyes, this is one satisfactory method. Another is a heavy ratchet strap across the boat's cockpit, or over the splash well.
I would never trust the cleats to carry the strain of the trailered boat. I have seen a number of boats which came off trailers because they were not strapped down in the stern.
Not sure what type of vertical "Rods" you have. Many boats have side guide bunks, which are a couple of inches off each side, when the boat is properly on the trailer. This is very helpful in the C Dory, since we do not have a "deep V" or keep the boat in the center. There are also either round or square tubes which can extend up on each side near the back of the trailer. These are generally not strong enough to take the weight of the boat--and I have seen them bent. They are visual aids, and can be used when the boat is floating to help center the trailer.
Most are covered by PVC pipe, which may rotate. Some boaters have put running lights on top of these centering tubes. I feel that is a good idea, plus the trailer frame lights. I have also put a "light bar" of PVC pipe, with the 3 small running lights in the center, and the brake, turn and stop lights on each side. In today's world the LED lights are more durable and visible. Highly recommended.