After a year of transition during its initial operating capability period, Marine Corps Installations Pacific achieved full operational capability Oct. 1. Full operational capability means MCIPAC possesses a fully-developed capability to oversee, direct, and coordinate installation core functions, including training and operations support, command and staff support, and community services. - After a year of transition during its initial operating capability period, Marine Corps Installations Pacific achieved full operational capability Oct. 1. Full operational capability means MCIPAC possesses a fully-developed capability to oversee, direct, and coordinate installation core functions, including training and operations support, command and staff support, and community services.