Article by nos4r2
Original Article

Make sure your boat is SECURELY fastened to the trailer before towing. The winch strop is NOT enough-Chain the bow eye to the winch post too. Use a padded ratchet strap or tie downs (specially on a RIB use tie downs rather than a ratchet strap) to hold the stern down. Contrary to some people's opinions, boats WILL bounce off a trailer.
Make absolutely certain your outboard is tilted and can't drop down while towing.
There should be about 25 kg of weight or 5-10% of your outfit's weight (depending on the weight/setup of your rig)on the tow ball of your car from the trailer. If there's significantly more or less then move the gear in the boat or if that's not enough move the trailer axle-they usually move on U-bolts. If it snakes about at normal motorway speeds at all then it needs adjusting.
Always check your trailer tires for cracks and correct pressure,brakes for binding and operation (if braked)and wheel bearings for stiffness/rumbling/notches before towing any distance. None of these last too well when they get dunked in salt water regularly. If it's got grease nipples on it then buy a grease gun and use it regularly. Make sure you hose your trailer down with fresh water after every recovery-brakes included.
Regularly check the bolts holding your trailer together. The trailer may well be galvanized but bolts still rust and may well give way. Pay special attention to the bolts holding the tow hitch on.You really don't want to kill someone or lose your boat when it decides to cross all lanes of the highway before it hits a car head on.
On braked trailers use a safety chain that will stop the tow hitch hitting the ground if it becomes disconnected.
On braked trailers use the correct wire breakaway cable-this will apply the trailer brakes then snap if the trailer becomes disconnected from the car while moving.
Check your trailer board/lights works properly every time you use it. The one time it doesn't you'll get stopped by the police for it.
Don't forget your braking distance will be around double your braking distance without a trailer.

This is indeed a very valuable piece of advice that should be implemented and be remembered all the time by people that always go for boating trips as it is important that lives might be at stake if you do not follow the instructions. It is indeed crucial as you might not want to have lives in jeopardy as the boat might just get loose and hit others on the road. I believe that everyone should have this in mind.