What changes is the current. The SG is one of my favorite dives, It was my first ocean deep wreck dive and 4 days later my 100th dive. I've been on it a few times since. Conditions ranged from mill pond to a current that if you did lose the line or get blown over the rail they'd likely pick you up in Miami if the boat did not know you were off it. Hence the need to do a blue water ascent and why a spool or reel and SMB would be essential gear for a dive on this site. Having those gives you a visual and tactile reference when doing an ascent in blue water. It also let's the boat know where you are. Nice if you surface several hundred yards away. Which is highly possible. The never let go of the line is good advice on entry. One dive I did we were required to giant stride in with the right arm out to the side to make sure we caught the line. And the current can change during the dive.
The SG and Duane are IMO can't miss dives for those who are prepared for them. For those who are not. I'd pick something else.
If you have any doubts don't even go out to the site. While I or others may be ok doing the dive in less than stellar conditions if you are not I'd be upset if the site was changed to accomodate two when the other 4 are ok with the dive. It;s a big deal for me to get to Florida and the Keys. I book my dives based on being able to do them regardless of who else is on the boat. A double dip would have you sitting in the hot sun for a good long time. I would not be ok with thumbing my dive.
The SG and Duane are IMO can't miss dives for those who are prepared for them. For those who are not. I'd pick something else.
If you have any doubts don't even go out to the site. While I or others may be ok doing the dive in less than stellar conditions if you are not I'd be upset if the site was changed to accomodate two when the other 4 are ok with the dive. It;s a big deal for me to get to Florida and the Keys. I book my dives based on being able to do them regardless of who else is on the boat. A double dip would have you sitting in the hot sun for a good long time. I would not be ok with thumbing my dive.