Taken the bike on a lot of ferry's from UK to Ireland and France. Each time has been the same thing of ride on into the bike area, side stand, single strap over the seat, making sure you leave the bike in gear so it doesn't roll off the stand jobs done. You will find most big ferries will do this for you but say that it's your own responsibility if anything happens.

The smaller rougher ferry's though I think I would want to tie it down a bit more just to be safe but even the above wont budge easily (I've tested it by a lot of heavy pushing from every direction)

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Wish List: Husqvarna TE450 & Yamaha XT660Z
05' Suzuki Bandit 1200 .::. Current temp bike, don't like it! WAY too heavy!
05' Suzuki DR-Z400E .::. Jimmy Button Bars, Force Rad Guard, B&B BashPlate .::. Stolen in Byron Bay, Australia - Jan 09
06' Suzuki SV650N .::. Written off .::. Church Stretton to Much Wenlock - Aug 07