My actual experience as a real-life submarine commander...

[papa_smurf]

see your motorhome and raise you a small cabin cruiser.

- Daily hygiene may involve bathing in the sea. Regardless of weather.
- Limited freshwater reserves; can't waste it just washing the salt off.
- In foul weather, nothing is completely dry for days on end
- very basic wc, no shower, no fridge, no heating, cooking with kerosine
- limited food selection on longer trips, thanks to the above
- very limited electricity (prefer to avoid running the engine if at all possible)
- if we use it, everything smells faintly of diesel oil for some time
- shaken about a lot in foul weather (wasserbomben!)
- need to evade bigger surface craft
- cramped living space (I have my own bunk though! And it's almost as long as I am)

That reminds when I went on a weeks holiday on a narrow boat. Now i'm 6'2" tall and was constantly bent over when walking inside the narrowboat, occasionally banging my head . Was a nice holiday, until the seal on the toilet broke and the smell from the effluent tank was, well, frankly vomit inducing......