While I have not used them in a few years, I drift dove quite a few times while visiting my in-laws spanning several years with Leo Sand on the "Deeper" (Dive Charters International) departing from Sea Mist Marina in Boynton Beach. Because of how the Gulf Stream comes close to the shore in this area, they have great drift diving over a very healthy and vibrant reef, and virtually every dive with Leo is a drift dive. Max depths range from about 70 feet on the shore side of the reef and about 90 feet on the ocean side of the reef. The top of the reef is at about 60 feet.
Leo runs a good operation. He drops groups of 2 - 4 divers at various intervals along the reef. One person in each group carries a dive flag float and he/she is "never lost". Other divers in that group only need to stay near (within sight of) the person carrying the flag. As each diver hits their limits (either air or no-deco time), they ascend following the flag line and once at the surface, Leo or whoever is captaining the boat that day picks them up. Once down to two people on the flag, when the first one hits their limits, they both ascend and are picked up. Surface intervals are always at least an hour on two-tank dives. Leo's motto is "you are only a stranger but once on the Deeper", and I found his motto to be true. My contact info for Leo/Little Deeper is 888.340.DIVE, 561.734.3818 and firstname.lastname@example.org
. His website is www.deeper-dci.com
. And I have no affiliation whatsoever with Leo or his operation except as a pleased previous customer.