Oh....Thank you, Isabelle!
I am a bit sorry for using the wrong words!
ER.... think I should have said 'welded' - not 'riveted'
- as in, 'Can portholes be inserted into welded sheet / panels?
(at least I've learnt something.....
)
However - I am trying to understand which comes first.
Is it the design of where the portholes will be situated - (Wouldn't this affect all that follows?)
Or does the position of the welded joins of the the hull (panels) get planned first?
If it were the latter - then my question about portholes cut into an area that's been welded could still be relevant.
(because otherwise, mightn't portholes end up being randomly placed?!)
(hopefully this can all become clear - fairly soon!!)