Great hammerhead shark????

Location: The Canyon, Isla San Benedicto, Socorro/Revillagigedos, Mexico
Comments: Divemaster Sten reports that the swell made it impossible to stage scuba dives at The Boiler but that did not matter as they found giant mantas at The Canyon.   They also got the Hammerhead sharks going in circles. Some thought one shark was a great hammerhead shark as it was 12 feet long  (and passed very closeby the divers).   Sten and divemaster Tricia confirmed that it was just a very large scalloped hammerhead shark.  An unusual sighting was when on a surface period a pod of false Killer whales passed by.
Weather: Overcast but nice day with a strong north wind and too much swell to scuba dive on The Boiler (a pinnacle very exposed to weather on the west side of San Benedicto Island).
Water: Visibility 100 feet, water temperture 78°F