Maybe I'm just incompetent, but I can't seem to figure out Zone Codes.
When I happen to know the name of a site, it's no problem: just use the map to look up the name & cross-reference the number. But if I don't know the name of the site, I can't seem to figure it out. There's no series of clickable maps beyond the main zones, is there?
FYI, I'm looking for names/codes for Vieques in the Spanish Virgin Islands [TWA]. The listed names are utterly inscrutable to me & don't correspond to the dive guides I've seen.