Master Sgt. Alex Ng, the field artillery chief assigned to Battery Q, 5th Battalion, 11th Marine Regiment, 1st Marine Division, explains the abilities of the M142 High-Mobility Artillery Rocket System to Maj. Rafael Pires Ferreira, a battery commander with Brazil’s Corpo de Fuzileios, aboard Marine Corps Base Camp Pendleton, Calif., Aug. 5, 2015. Two Brazilian military officers participated in a Subject Matter Expert Exchange with the Marines and Sailors of 11th Marines to compare standard operating procedures and to share experiences and ideas. - Master Sgt. Alex Ng, the field artillery chief assigned to Battery Q, 5th Battalion, 11th Marine Regiment, 1st Marine Division, explains the abilities of the M142 High-Mobility Artillery Rocket System to Maj. Rafael Pires Ferreira, a battery commander with Brazil’s Corpo de Fuzileios, aboard Marine Corps Base Camp Pendleton, Calif., Aug. 5, 2015. Two Brazilian military officers participated in a Subject Matter Expert Exchange with the Marines and Sailors of 11th Marines to compare standard operating procedures and to share experiences and ideas.