I'm watching K19-The Widowmaker tonight. I have a question.

In one scene, the soldiers are given little towels with which to cleanse themselves. The explanation is, they only shower once a week. Now why would that be? For showering, does it really matter if its salt-water? Just bring in some raw from the ocean, and then drain it back out of the ship. Why use precious 'stored' water?

Just a thought.