Trainees begin "A" School (trade school) upon completion of boot: 4 weeks classroom, 8 weeks hands-on. From "A" School, trainees most often report to a NMCB or ACB. There recruits go through four-weeks of Expeditionary Combat Skills (ECS) which is also required for those who report to a Navy Expeditionary Combat Command. ECS is basic training in: map reading, combat first aid, recon, and other combat-related skills. Half of each course is spent on basic marksmanship to qualify with a M16 rifle and the M9 service pistol. Those posted to Alfa Company of a NMCB may be assigned to a crew-served weapon: MK 19 40mm grenade launcher, the .50-caliber machine gun, or the M240 machine gun. Many reserve units still field the M60 machine gun. Seabees were last U.S. military to wear the U.S. Woodland camouflage uniform or the Desert Camouflage Uniform. They now have the Navy Working Uniform NWU Type III and use ALICE field gear. Some units, with the Marines, will use USMC-issue Improved Load Bearing Equipment (ILBE).