At least if you did have engine trouble, you would have a convenient yacht to rescue you!!!
If you do it, make sure you take a look at the CAA General Abiation Safety Sense Number 21A - Ditching, before you fly. According to that 88% of ditchings are succesful without injury to pilots or passengers. However, of those roughly 50% of the survivors die before being rescued, so make sure if the noise goes, that you get as close to a boat as possible.
If you get weather like today, it should be a good trip!
enjoy it!
Bigair