MAS
Deity
Does a ship being veteran reduce its risk of sinking in unfriendly waters?
Don't think so, but I never worried about it anyway...
Is a curragh more likely to sink in unfriendly waters then a galley?
I'm not sure. I thought it was purely based on what tech (and wonders) you owned.
Are either more likely to sink on ocean squares then sea squares?
I'm pretty sure yes, sink chance is higher in ocean.