yea...by the stars I was guessing 20-30 seconds. But I'm amazed how still the water must have been, I tried getting shots of sailboats anchored up in Bonaire a couple weeks ago, but even tho the water seemed fairly still, it was still too much motion for my taste on the shots I got.
I was pleased with this one, but these ships are big enough they were not going to have much motion:
Bonaire-198











