Apparently from an Ambergris Today article the couple was far offshore. According to the passengers on both the Caye Caulker taxi that gave aid and the passenegers of the SP Express, both boats were in their normal lane of traffic, which based on my times on the taxi is several hundreds of yards offshore.

People not used to the water as a means of transprotation dont see the inner reef waters as being a road or freeway system, we do need (will) to post reminders of this. I mean even the most well informed people will sometimes do what they want but at least we'll have done what we can to keep them informed.

Who knows what the mental state of the couple was? Was it oh how nice lets go snorkeling, and the the time and distance got away from them?, or was it lets swim to the reef but we'll need to keep an eye peeled? Tragic all the way around.