Hi! Alexander,

On 02 Dec 18 20:34, you wrote to me:

 AK> You mean a submarine cannot sink? What they do, in English, when water
 AK> rushes inside?  ;-)

Ah, a diving boat.  Yes.  My apologies.  I used the word in its literal sense:
under (sub) + sea (marine). On reflection, I should have avoided any confusion
and said "under sea"... cities.  I was naughty,

 AK> I think floating things safer, especially when they consists of
 AK> thousands of watertight compartments. If I design such a town I would
 AK> made it from big laced steel platforms, and every platform is
 AK> surrounded by thousands of watertight cisterns. Every cistern has a
 AK> limited time service and can be replaced.

Mmm... that sounds familiar.  Is that how bridge foundations are formed?

Cheers,
Paul.

... You Just Like Me Coz I'm Good In Bed - Shirl & the 'hooks, 1974.
--- GoldED+/LNX 1.1.5-b20130515