Hi Be Free!
We use a similar aux bow securement but with a cable and spring hook.
You’re right about not wanting to rely entirely on a winch.
It’s a multi part mechanical pivot/pawl/spring engagement mechanism that can fail at numerous points. I’ve seen the consequences of them being the sole securement for a boat and it wasn’t pretty. Innocent people got hurt badly and multiple vehicles were damaged. The boat was a write off.
Most state DOT jurisdictions require that there be a means to secure the bow and stern of a vessel securely to the trailer in the event of a rollover incident as was mentioned by Winsome. Without getting into the weeds of the specifics one should be best to consider that each of these securement need to be more than capable of suspending the entire weight of the vessel and with a considerable amount of margin.
The kinetic forces of a boat traveling are considerably larger than the average guy might imagine.
Ek = 1/2mv(squared)
where:
Ek is the Kenetic energy
m is the mass of the object
v is the velocity or speed
Let’s assume a basic M26X or M26M weighs about 3000 lbs and the boat is moving down the highway at 60 mph.
What is the kinetic energy of just the boat…
A basic M26X/M boat weighing 3000 traveling at 60 MPH becomes a f’king @#$&*€£¥§!!! (Big number in engineering terms)
(NOTE: I corrected the prior post…my iPad upgraded talk-to-text got me…again! Just like the auto spell correct.. my bad! Thank you Be Free for bringing this to my attention! Thanks!

)
Now imagine that object jumping free off the trailer on a crowded highway on a nice sunny day where young families with kids are out traveling to a ball game or off to see Grammy and Grandpa in a nice little compact car and said boat careens into the oncoming traffic lanes…….
Not a pretty picture… I’ve seen it…and had to deal with the injured….
DOT Regulations are not there to be an inconvenience or annoyance to you, they are there so that everyone can sleep at night without nightmares.
Please have and use tie downs appropriately sized/rated/secured for your vessels when towing. You’ll sleep better.
Best Regards,
Over Easy
