1、 CHAIRMAN OF THE JOINT CHIEFS OF STAFF INSTRUCTION J-3 CJCSI 3156.01A DISTRIBUTION:A,B,C,S 30 April 2012 MANAGEMENT OF JOINT UNIT REFERENCE NUMBERS References:(a)DoD Directive 4630.05,5 May 2004,“Interoperability and Supportability of Information Technology(IT)and National Security Systems(NSS)”(b)M
2、IL-STD 6017 Series(DoD Interface Standard),30 October 2009,“Variable Message Format(VMF)”1.Purpose.This instruction,issued under the authority of reference a,establishes policy for Combatant Commands,Services,and Agencies(C/S/A)on the management of Unit Reference Numbers(URNs).It specifically define
3、s a management structure for the assignment of URNs that is responsive to the needs of C/S/A.URNs are associated with the variable message format(VMF)as defined by the Military Standard(MIL-STD)6017 series.The authoritative joint definition of a URN is a reference number used in a VMF interface by u
4、nits to uniquely identify friendly military units,broadcast networks,and multicast groups.URNs assist in the correlation of positional information in selected friendly force tracking(FFT)systems,serve as entity identifiers to facilitate situational awareness(SA)and/or command and control(C2)message
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