Navy Officer designator · IT & Cyber
629X Communications Specialty (Submarine) 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
Submarine Communications Limited Duty Officers manage the operation and employment of submarine communications, information assurance, security management, communications security, and electronic warfare systems and procedures. They advise commands on communications planning, modernization, and information systems management while supporting personnel employment and onboard training programs.
Notes & Sources
- NOOCS Part A (Edition 96, Jul 2026) prints officer code 629X as “A Limited Duty Officer…”, paired with its Limited Duty Officer billet row (billet 6290 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 629X 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 629X, cached text line 814
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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