Originally Posted by sail7seas
If you don't care to carry it, be creative about finding a place to put it in your cabin. There are any number of 'safe' places to leave it in your cabin.
I'll be honest ... I overlooked the obvious. Just use an out-of-date credit card and then it's no big deal to leave it hidden in the cabin. I was "assuming" just using a credit card ... or my ATM card ... and wouldn't want to leave that unsecured in the cabin.
While I still prefer the combination lock system, I guess you make a good point about the waste in converting all the safes on those ships.
Blue skies ...