Marine Corps Warfighting Publication (MCWP) 6-22, Communications and Information Systems, provides the doctrine and tactics, techniques, and procedures for the conduct of communications and information systems across the spectrum of Marine air-ground task force (MAGTF) operations. Marine Corps Reference Publication (MCRP) 6-22C, Radio Operator's Handbook, complements and expands upon this information by detailing doctrine, tactics, techniques, and procedures for operating single-channel high frequency (HF), very high frequency (VHF), and ultrahigh frequency (UHF) radios. The primary target audience for this publication is Marine Corps radio operators and other users of singlechannel radios.