Photos by MC1 Michael C. Barton UT3 Sharif Vadon, along with other Seabees assigned to NMCB 11, check the area for contamination during a chemical, biological and radiological (CBR) drill, Gulfport, Miss., Sept. 5. This training is part of NMCB 11's homeport training period, which heightens knowledge base, essential mobility skills and command readiness. HM1 Vincent Bell, NMCB 11, explains the doffing procedures during a chemical, biological and radiological (CBR) drill, Gulfport, Miss., Sept. 5. This training is part of NMCB 11's homeport training period, which heightens knowledge base, essential mobility skills and command readiness.