Well, if you're concerned about him going from cockpit
, you could always go for an old fashioned gangplank/"boat boarding ramp" for the easiest access. Of course it may slide around on the dock's surface. Also if you get a long one it might become a hazard at times.
If it's more about him braving the companionway
, you could setup a removable ramp
with carpet or some kind of other nonskid surface that might extend down into your kitchen area depending on what type of boat you get.
I definitely see a big risk for your pup getting injured while trying to move between the cabin and the cockpit
under not-so-fair conditions, especially at-sea. As far as I know, the cockpit would be a tight place for a medium to large size pup and you wouldn't want him or her to cause mayhem by accidentally plowing into your autopilot/tiller/anything else you can think of while you aren't looking.
I would probably be most concerned about losing him overboard
without noticing because of a nap or some other minor distraction. It could easily happen if he can go outside whenever he wants.
Not to mention what he might try to pull during a brief moment of silliness when he sees a dolphin, fish
, fin or strange looking swell that makes him want to investigate a little closer...
Can't think of options other then just helping him up and down every time, letting him get used to the stairs or trying to install a homemade companionway ramp
of some kind.
(Well, unless getting a catamaran
is an option. Way more open space in one of those.)