I watched it go down, the boat was going at around 18kts so by the time we got back to where it had entered the water it was too late to recover it.
I think you win in terms of loss... I think if i where you i would have just followed it off of the boat! I did the same on the jeep, jumped right on after my camera! When i think back it was maybe not the best decision considering the jeep was moving, but my cat like reflexes did my well!
I should get my lens back tonight, I hope it is all fine....
I have been in contact with BR and they have been quite nice (kudos to them). they asked me "How do you feel we can make this situation right for you?" So i asked them to pay for the repair bill... lets see what they say about that! Will keep you posted!