I have over 1,000 dives on the Duane both day and night and several hundred on the Spiegel Grove. Both are advanced dives with potential currents that can change from day to day and hour to hour. Most divers that have problems on the wrecks suffer from over confidence or complacency with no plan or surface support. Both are essential. Some times the current isn't too strong and it gives divers a false sense of security and at other times the current and rip your mask off if you're not careful. The Duane has much more growth due to being down since 1987 and both have a large quantity and variety of sea life. Barracuda, Jacks, Permit, Eels, octopus, Amberjack, turtles and a large variety of smaller tropicals as well as a variety of hard coral growth. The Duane at night is beautiful with Orange and Gold Cup corals covering the entire Starboard side and usually adorned with Basket stars and a numerous anenomes throughout the wreck. As you can tell I am much more partial to the Duane as I've been on and in it for about 15 years and the Grove is just too new to have the character that the Duane has acquired over the years. Depending on the closeness to the Gulf Stream, the tides, and direction of wind visibility on either wreck can be well over 100' or as low as 10. Divers have had problems on both wrecks and generally because they either don't have a definite plan or lack of surface support. A great many operations down here tie up on one mooring ball and you must make your way back to that line. In a perfect world that always happens but this isn't a perfect world and conditions change, divers become disoriented, they don't have the training or experience for the dive and you must be ready to bail yourself and/or your buddy out to make it back to the dock safely. The Bibb and Eagle are also great dives, each with their own character, individuality and their own hazards. If you'd like more information feel free to get in touch with me and I'll share what I have.
Good and Safe Diving!