Heigth of Mast when towing

I have had to in the past, but maybe it depends on the ferry company?

They want to know the height at Brittany ferries (and the others, I guess) not just to gouge more money out of you (though this does appear to be a major motivation) but to work out where to put you on the ferry - some places have limited height.

It is worth reducing the mast support height to a minimum, and then raising the transom end so the mast stays below 6 feet, if at all possible, at least for the ferry journey.

I think you have to tell them what the highest bit is or risk being put somewhere where you rip the mast off the trailer on the deck above. If it makes a difference why not put the mast on a roofrack?

Edited by JimC - 22 Apr 13 at 5:12pm

As others have basically said, DO NOT LIE. The information is important for the loaders. If they suspect you're taller than declared, they'll measure you and either bill you accordingly or even deny you boarding, if the appropriate deck is full up. The same with length, obviously. Do not try and get away with paying less, as not being allowed on is, relatively speaking, vastly more expensive! 

We came back from France last year on the cat from Cherbourg- with the mast carefully adjusted, we were within the height limit for the main deck. Just. This really entertained the deck crew.

The tunnel might be easier as there's only two possible heights - car (up to 1.8metres) or the rest.

Edited by patj - 23 Apr 13 at 6:19am

We towed 2 F18 Catamarans stacked one on top of the other with masts on top on the ferry. Height was no problem but tell them all dimentions, including full length of car and boat together.