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Rang Mahn, Cham Island is a boat accessible salt water dive site, located at Cham Island, Hoi An, Viet Nam. This dive site has an average rating of 4.00 out of 5 from 1 scuba divers. The maximum depth is 71-80ft/22-24m. The average visibility is 21-25ft/6-8m.

Rang Mahn is off Cham Island. Boats depart daily from Hoi An, just south of Da Nang. I used Cham Island Diving, based in Old Town Hoi An.

Temperature varied quite a bit. Visibility was from 15 to 30 feet. There were times when I could see my buddy and he could see the others but I couldn’t see them.

This was in interesting dive for several reasons. It was quite aways off the island where there was some current and a definite thermocline. The site is around a pinnacle so part of the time you swim with a fairly strong current and part of the time against it. Same with the thermocline. The temperature can change instantly, dropping or rising 4-5 degrees Fahrenheit.

There are a lot a large boulders to swim around and through so you can see lobsters and other things tucked back in the cracks. There is also a lot of sunken fishnet but it didn’t present much of a problem if you kept an eye on your location and where you were going. Don’t expect to see anything large around Cham Island. There are hundreds of fishing boats out there every night. This is their main food source.

I saw Harlequin Shrimp, schools of juvenile Barracuda, Giant Sweetlips (this was the only fish of any size we saw on either dive), Golden Hawkfish, Anenomefish, Clownfish, 3-Spot Dacyllus, and Blue-Barred Parrotfish.

The most interesting thing about this site was the abundance of the color purple. There were lots of purple Sea Stars and purple coral of several types, including purple orchid coral. It was beautiful, although the visibility was quite limited in places.

Cham Island Divers use a large slow boat that takes both divers and snorkelers to the island. There were about 20 people on our boat but only 4 divers which was nice. The dive master was French and very friendly and knowledgeable. They had a good fish book on the boat which he used to help be identify what we’d seen.

Following the dives we went to a beach on the island where we had a wonderful local meal then a hour free to snorkel or just relax.