0621 Field Radio Operator MOS Patch

The 06 on this patch is the Marine Corps communications field, and 0621 is the field radio operator. Every Marine MOS is four digits, and the first two name the occupational field. An 0621 sets up and tunes the radios, establishes contact with distant stations, and processes and logs the traffic that moves across the net. When an antenna breaks in the field, the operator mends it or rigs a field expedient one. The operator also changes frequencies and cryptographic settings, and Marines in the MOS must be eligible for a secret clearance. When a commander needs fires, a medevac or resupply, the request goes out over that radio.

Marines who did this job in the Vietnam era held MOS 2531 Field Radio Operator. The current MOS manual titles 0621 Transmissions System Operator, but Field Radio Operator is the title generations of 0621s served under. New radio operators learn the trade at the Marine Corps Communication-Electronics School aboard the Marine Corps Air Ground Combat Center at Twentynine Palms, California. That school traces its line to a pigeon and flag handler platoon formed in 1932. The radios have changed from the AN/PRC-25 of Vietnam to the AN/PRC-117G fielded in 2011 and the multichannel AN/PRC-158 after it. Staff sergeants who stay in the field move up to 0629 Radio Chief, the MOS now titled Transmissions Chief.

The patch has the familiar MOS shape, a rectangle with the top and bottom bowed outward, finished with a red merrowed edge. MARINE CORPS is stitched in white across a black band at the top, and FIELD RADIO OPERATOR across a black band at the bottom. Between them, on a red field outlined in white, the big white numerals 06 and 21 sit on either side of the eagle, globe and anchor in gold, white and gray. SEMPER FIDELIS runs in white beneath the emblem. It measures 4.5 inches wide by 3.25 inches tall.

Radio operators serve all across the Corps, from infantry battalions and artillery batteries to comm battalions and higher headquarters. The radio operator stays close to the officer they talk for, and the antenna over the operator's shoulder is easy to pick out. In Vietnam the enemy made killing radio operators and destroying their radios a priority. The load is heavy, with the radio, spare batteries and antennas riding on top of everything else a Marine carries. Nobody notices comm when it works, and everybody notices the moment the net goes down.

It fits a shadow box with ribbons and a photo of the old radio section, or the vest worn to a battalion reunion. It is also a good gift for a new Marine who just finished comm school at Twentynine Palms with 0621 on their record. The iron-on backing goes on with a household iron, and it can also be sewn on for a permanent hold. Roger, out.