Complex sentence: The first being the Helicopter Maintenance Unit (HMU), also knowns as "Pave Flight", responsible for the maintenance, launch and recovery, and all immediate combat and sortie generation support pertaining to the helicopter mission.
Split into simpler sentences: The first being the Helicopter Maintenance Unit (HMU). The HMU is responsible for the maintenance, launch and recovery, and all immediate combat and sortie generation support pertaining to the helicopter mission.