151123-N-TI693-080 NAVAL SUPPORT ACTIVITY PANAMA CITY Fla. (Nov. 23, 2015) Cmdr. Hung Cao, commanding officer of the Naval Diving and Salvage Training Center (NDSTC) explains the importance of compression chambers to Rep. Gwen Graham (D, Fla.-2) while getting to watch some of NDSTC students using the compression champers to simulate depth levels while diving. Sen. Nelson and Rep. Graham (D, Fla.-2) visited NDSTC for a informative tour of their facilities to gain a better understanding of the training and technology used to become a military diver. (U.S. Navy photo by Mass Communication Specialist 2nd Class Fred Gray IV/Released)