Seabees practice removing and replacing filters on the M-40A gas mask while in the confidence chamber.

110624-N-IL826-186
PORT HUENEME, Calif. (June 24, 2011) Seabees assigned to Naval Mobile Construction Battalion (NMCB) 17 practice removing and replacing filters on the M-40A gas mask while in the confidence chamber during Unit Level Training and Readiness Assessment called Operation Sea Hornet. Operation Sea Hornet provides training ranging from classroom to small unit leadership that will assist in preparing for mobilization to various deployment areas of responsibility. (U.S. Navy photo by Mass Communication Specialist 1st Class Kenneth Robinson/Released)

110624-N-IL826-186
 PORT HUENEME, Calif. (June 24, 2011) Seabees assigned to Naval Mobile Construction Battalion (NMCB) 17 practice removing and replacing filters on the M-40A gas mask while in the confidence chamber during Unit Level Training and Readiness Assessment called Operation Sea Hornet. Operation Sea Hornet provides training ranging from classroom to small unit leadership that will assist in preparing for mobilization to various deployment areas of responsibility. (U.S. Navy photo by Mass Communication Specialist 1st Class Kenneth Robinson/Released)