Different Communications Plans were sometimes used by various Task Groups within the Task Force and frequencies within a plan were often shifted to overcome mutual interference or jamming by the opposition. Some of the other Watch orders gave consideration for guarding distress frequencies. The primary method of communications between ships was voice. Except for distress, the above frequencies were not the actual ones used and are only shown here for illustrative purposes. Line means the line number in the Communications Plan.
Circuit is the operational definition of a radio channel.
Combat Information Primary or Secondary. Used between OPS Rooms. Electronic Warfare Primary or Secondary. Used between Electronic warefare rooms. Anti-Submarine Patrol, Force 1 or 2 Primary.