Just returned from a crewed catamaran charter in the Grenadines, originating in Grenada. We secured a mooring ball in Tobago Cays around 4 pm and went to bed around 10 pm. Sometime after that the mooring ball let loose and we drifted until shortly after midnight, when we were awoken by the boat hitting the reef. Luckily we were on a 60 foot Cat that is very heavy so there was minimal damage to the hull. We anchored and the next mooring looked at the ropes that had let loose. They were totally rotted. The Park Rangers told us that we should know that "you moor at your own risk." That said, where does all of the EC currency go that is collected for mooring? Definitely not for maintenance.