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 The Reserve Limited Duty Officer (LDO) Community is comprised of 8 designators
Officer designator codes are four-digit numbers used to group officers by categories for personnel accounting and administrative purposes and to identify the status of officers.  These codes identify, through the first three digits, the categories in which officers are appointed and/or designated and through the fourth digit, the status of the officers within the various categories.

   6235. . . .Submarine Engineering/Repair
   6265. . . .Submarine Ordnance
   6285. . . .Submarine Electronics
   6295. . . .Submarine Communications
   6335. . . .Aviation Maintenance
   6415. . . .Administration
   6495. . . .Security
   6535. . . .Civil Engineer Corps

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