'm sorry for posting the message to Tommy Hng to this group. Cybergate has been acting up all nite. Regrets. Ray McAllister, Prof (Emeritus) Ocean Eng., FAU, Boca Raton, FL 33064 Diving Dinosaur, Geologist/Oceanographer/Ocean Engineer, 43 years SCUBA mcallist@gate.net (305) 426-0808, Author Diving Locations, Boynton/Dania