Rauscher's guide is very good. Be aware that chartplotters lie in Belize. Our charter boat
had a raymarine
plotter and I had my Garmin
handheld. Neither was entirely accurate though the Garmin
seemed a bit better. The problem is that the charts
they are based on havent been updated in many many years. I had the Admiralty paper charts also (the best for Belize) and some parts
of them dated from lead line surveys in the 1840's! But the waypoints in the Rauscher guide were spot on, at least all the ones I used.