Navy Officer designator · Aviation
639X Air Traffic Control Specialty LDO
Current service use not established
This code is listed in the directory. Inclusion alone does not confirm current service use.
A Navy officer classification, not an enlisted rating.
Overview
Air Traffic Control Limited Duty Officers plan, organize, manage, and direct air traffic control operations ashore and afloat as FAA-certified technical managers. They develop procedures and controller training programs, coordinate with other air traffic control facilities, and prepare proposals and justifications for naval airspace actions.
Notes & Sources
- NOOCS Part A (Edition 96, Jul 2026) prints officer code 639X as “A Limited Duty Officer (Air · Traffic Control)…”, paired with its Limited Duty Officer billet row (billet 6390 requiring the specialty); the row states who holds the code and which specialty the billet requires, not what duties every holder performs. See the cited block for the exact pairing text.
- Because the Navy carries no duty, training, or clearance prose at designator level, occupation-specific recommendations are not published here; a 639X officer’s duties depend on the assigned billet.
Evidence for this guidance (1 document)
- NAVPERS 15839I Vol I Part A · Billet and Officer Designator Codes (NOOCS Edition 96, Jul 2026)
[1] Part A officer designator table, block 639X, cached text line 848
Supports: Specialty definition
Source review recorded September 24, 2026.
Descriptions may be summarized for clarity. Verify all information with your branch career counselor or official military documentation before making career decisions.
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