Physical security

I was away last week visiting the Outer Hebrides. It is a long drive, but we chose to self drive the small hatchback instead of generating a flight of Co2. Hence we crossed the Minch via car ferry. Cold, blowing a gale, and with waves literally crashing over the bow on the return trip. Spectacular. The handy passenger information told me that you would last 2 minutes if you found yourself in the water. and advised me to keep my woolen jumper on to extend my life by that crucial 10 seconds. But as I watched the salt water torrent heavily off the outer surface of the observation deck window I again wondered about the logic of having every passenger strip to their socks for every flight, while major car ferry crossings to and from the British isles are essentially never, ever checked. Meanwhile every vehicle can hold lot more explosive punch than 20 pounds of checkin airline luggage. Silly.