I always thought it was great that you can tell they filmed it on an actual ship (except the hospital and the cabins they’re too small) and they are all running into the walls in the hallway, must have been rough seas

I've noticed that normally when anyone offers Columbo an alcoholic drink he either refuses or he accepts the drink but either only takes a small sip or doesn't drink any of it at all before saying he has to run along or whatever. Something I've noticed in quite a few episodes so it must be intentional. I guess that he doesn't drink too much while on duty as he wants to keep a clear head. Of course there are exceptions too where he does drink more like food and wine related episodes such as "Any Old Port in a Storm" and "Murder Under Glass".

Don't forget THE CONSPIRATORS where Columbo I think does legit drink quite a bit with the Irish murderer.