Hmmm. OK, please forgive my ignorance, but I'm trying to parse your last comment and understand the context. Looking over a map, it looks like SRC is on the north side of the island - I see it on an online map of dive sites.
It is but it's also on the "inside" of the island in the North Sound.
I'm guessing from your post that most the diving is generally done on the south side of the island,
Not really - most of it is done on the west side of the island. Sunset House and maybe a couple others do dive the south side sites also. At certain times of year other diveops also move their boats south and drive you there in a
van.
but I see online dive site maps that show some other dive sites on the north side (quite a few of them, actually).
For clarity, let's use the same map - this one:
http://www.caymanactivityguide.com/Maps/MapDiveSites.jpg
See all the sites to the left of West Bay marked in Yellow? Starting with Hepp's Wall on down to Sand Chute.
Those are the "West Bay" sites typically dove from diveops located along Seven Mile Beach. Below that in Black are sites also dove in that area. Most of the diveboats are based on that side of the island.
The farthest north we ever went using one of those diveops was Hepp's Wall, most of them will not make the run around the entire West Bay peninsula and then into the North Sound for Stingray City. And the farthest south we ever went was Blackie's Hole. Our diveop was based mid-SMB.
So for SRC dives, most park a 2nd boat at one of a couple marinas on the west side of the North Sound and take you to it in their van. Actually most of them run you to their west side boats via van also, every morning we saw several vans picking up at the hotels along SMB.
South of there - the sites listed in black between the two wrecks are off Georgetown.
Any of the divesites located north of the North Sound - there are a lot of them - could be done from Divetech at Cobalt Coast and other diveops in that area - not sure if there are any others though. If you see the main road on the map, just about where it ends is where Cobalt Coast is located.
Or find someone with a boat based in the North Sound -
I don't know who that would be.
To answer your question, those sites are typically dove less frequently. Besides distance, you've got the North Wall and it's depth, currents etc. to contend with.
The vast majority of tourists stay in the 7MB area - or are off the cruiseships in Georgetown daily. So their business is on that side.
Anything near the East End is typically only dove from Ocean Frontiers/Tortuga Divers on that side of the island. It's about a 45min. drive from Georgetown - maybe slightly less.
Before anyone responds to this, I'm just
generalizing for the benefit of the OP. Some diveops do have more flexibility in how far north/east they go.
I've just
never heard of one that does SRC as a 2nd morning dive.