Greg, all,

ObTrav:

At 04:54 AM 1/2/2016, you wrote:
<SNIP>
I picked oxygenthough because Doug's ship design was for a cargo application, and that was likely to involve near orbit operations of Human-inhabited planets at some stage, so oxygen, evenin trace amounts, was an inevitability.

Would cargo ship owners do regular and thorough outer hull maintenance? Depends... :-) (I'm thinking classic tramp ocean steamers)

I had a personal bad expereince with cement corrosion quite recently...H2O was responsible for getting at the steel first though. It took 30 years.

So the free trader with a 200 or 300 year-old unstreamlined (for those who want to see how LEO or deeper space corrosion works) or streamlined (for those who want to speed the process a bit) small trader who isn't that keen on scrubbing and coating the hull (would this be called careening - not because the captain's hauling the ship out of water but because it's similar in concept?) might have to deal with outside corrosion.  And not dealing with it actively might lead to dealing with it reactively e.g. "What do you *mean* we sprung a leak?!?!?"

Works for me!

This is one of the things I love about this list: Anything and everything that gets brought up turns into a kinda neat discussion - with thoughtful input - that provides nuggets for my game.

Thanks - and keep at it!

Bill Rutherford
xxxxxx@comcast.net