The Chief Warrant Officer (CWO) Community is comprised of 28 designators in the surface, submarine, aviation, general series, supply and civil engineer corps communities.
    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.

     To find out the specific duites of each designator, a download has been provided: CWO Designator List

   711X. . . .Boatswain (Surface)
   712X. . . .Operations Technician (Surface)
   713X. . . .Engineering Technician (Surface)
   714X. . . .Repair Technician (Surface)
   715X. . . .Special Warfare Technician
   716X. . . .Ordnance Technician (Surface)
   717X. . . .Combat Craft Technician
   718X. . . .Electronics Technicians (Surface)
   720X. . . .Diver (Submarine)
   721X. . . .Boatswain (Submarine)
   723X. . . .Engineering Technician (Submarine)
   724X. . . .Repair Technician (Submarine)
   726X. . . .Ordnance Technician (Submarine)
   728X. . . .Electronic Technician (Submarine)
   731X. . . .Aviation Boatswain
   732X. . . .Aviation Operations Technician
   734X. . . .Aviation Maintenance Technician
   736X. . . .Aviation Ordnance Technician
   738X. . . .Aviation Electronics Technician
   740X. . . .Nuclear Power Technician
   741X. . . .Ship's Clerk
   742X. . . .Data Processing Technician
   744X. . . .Information Warfare
   745X. . . .Intelligence Technician
   748X. . . .Explosive Ordnance Disposal Technician
   749X. . . .Security Technician
   751X. . . .Supply Corps Warrant (SC)
   752X. . . .Food Service Warrant (SC)
   753X. . . .Civil Engineering Warrant (CEC)