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Issues Between VMF and 2525. David Couturier. Issues. Tactical Graphics - Categories vs Symbols Categories in Units, Equipment and Installations No Statement, Undefined, Illegal Entity Type w/ or w/o Entity Subtype. Category. Tactical Graphics Category vs Symbol. Symbol. Category.
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Issues Between VMF and 2525 David Couturier
Issues • Tactical Graphics - Categories vs Symbols • Categories in Units, Equipment and Installations • No Statement, Undefined, Illegal • Entity Type w/ or w/o Entity Subtype
Category Tactical GraphicsCategory vs Symbol Symbol
Category VMF for Airspace Coordination Area (Example) AC A- -- Should NOT have a VMF Representation
Inverse Problem • 2525 Does not have Categories for All groups of Symbols in Units, Equipment and Installations. • Creates Problem When Wanting to Send Unknown for a particular UEI
Definitions ? • No Statement – The operator/system has chosen not to identify further detail related to this field. • Undefined – This is a legal value, but the standard does not specify what it may relate to, therefore systems may use this value if they have an agreement between them as to the connotation. • Illegal – This value is not allowed to be used. Are These Correct?
Use of Entity Type & Entity Subtype • In Numerous Locations in VMF it is Possible to Define a Symbol Three Ways • Entity Type with Subtype = No Statement • Entity Type with Subtype = Unknown • Wntity Type with no Subtype Provided • This Could Lead to Different Interpretation and Uncertainty as to What Was Meant by Sender Recommend Use of Entity Type with Subtype = Unknown