Originally Posted by 9D280
Errr by that theory every single sailing dinghy ever towed is illegal.
Projections still need marked, (e.g overhanging mast) but you can hang the lighting board off the rudder pintles with no problem. (even tho' the back end of the trailer is probably 1.5m ahead of the lights)
There are exceptions for boats, where (and I am open to correction on this sentence) the boat is essentially considered part of the trailer for lighting puposes,
of the lighting rules are different or not applicable when used on a boat trailer, from memory, mostly around orange markers & front facing whites when the length gets to the size you would normally need them.
This is pretty much correct. You can have up to a 3.05m overhang as long as you have a lighting board fitted. There are different parameters for shorter lengths of overhang. But yes, essentially up to 3.05m (which would be a dinghy etc) overhang and you can have a lighting board on it.
As for fitting a lighting board to your A-Frame, again I think you would likely be covered by the law. Ironically, it'd probably be the red, reflective, triangles that would let you down!
If you can't adhere to the standard lighting regs you can have the indicators up to a height of 2.3m and the stop/tail lights up to 2.1m, off the ground... The triangles, however, can only be a max of 1.2m off the floor.
So the 'work-round' would to be to fit reflective triangles to the side of the trailer chassis* and hang your lighting board on your A-Frame.
* Is anyone really going to? Unlikely!
So before we hijack the post anymore (apologies to OP!), I refer to my previous suggestions for stopping the boat hitting the chassis rails