http://www.bahamas-travel.org/bahamas-cruise-guide/

Cruise excursions times (trying to get more than one)?
Let's go straight to him instead of wasting time. Info: Nassau, Bahamas (Location) Wanting to do, "Black Beard Island (snorkeling) and shopping tour (photo op resort and Atlantis) My concern is that I wont be able to do both because of the times travel (an outlet for a moment while leaving the other at another time). I have about 10 hours but did not want to rush and not enjoying the trip. Does anyone know if you can get both in one shot or not the excursions have limited time left only once. Basially So Im saying is that there is more than one opportunity to catch either the boat the island of Black-beard or guide (bus) to the city. Thanks for your time and have a great day.
Most trips tend to start from scratch and can not travel back as this calendar. The only exception is if you're a morning / day trip, and the other is a journey of the sun .. but it is difficult. In general, I do not think you will be able to do two in one day.
Cruising Eleuthera, Bahamas w/ Capt. Frank Papy – Sailing Quarterly – Part 1