Pump out stations are practically non-existent. My best recommendation is to pump out offshore
off soundings, by which I mean over 300' of depth
. In the Bahamas
that's going to mean in the Tongue of the Ocean, or Exuma Sound, or similar.
The object is to not pump out in confined harbors or areas with little current
I have no ideas what the specific Bahamian laws are from location to location.
If you find it necessary to pump out while sailing across the banks, that's a lot better than pumping out in a small anchorage. It's a matter of doing what your common sense tells you is best, rather than worrying about what people will tell you are the fine legal
In my experience most people in the Bahamas do not use holding tanks
to start with, unless they are in a confined area with little current
flow, or in severely populated anchorages
such as Georgetown
I'm going into my foxhole now.