Hatefull little b@stards some of them these days. Had a similar problem a few years back in the marina at H/Pool, only it was air rifle pellets scattered accross the deck. Looks like the little scroats thought the small round deadlights made a good target, Never did catch the buggers but scattered the stone throwers with a few well placed glass marbles fired from a very powerfull catapult. (Hasten to add I aimed to miss, but not by much), The air rifle practice also ceased after this episode. Hope no more damage done, regards, Mike.