What J-series message is for a surface track?

What J-series message is for a surface track?

• A. J3.0
• B. J3.2
• C. J3.1
• D. J3.3

Answer: (D)

In Link 16, track data is organized by the domain the track belongs to, and the J3 family carries track information with specific subtypes assigned to different kinds of tracks. For surface track data, the J3.3 subtype is defined to carry the appropriate surface-related fields (like position, velocity, and other track attributes) in the correct format. The other J3 subtypes are used for other track types (such as air tracks or multi-domain contexts), so they wouldn’t be used to convey a surface track. That’s why the surface track message is J3.3.

In Link 16, track data is organized by the domain the track belongs to, and the J3 family carries track information with specific subtypes assigned to different kinds of tracks. For surface track data, the J3.3 subtype is defined to carry the appropriate surface-related fields (like position, velocity, and other track attributes) in the correct format. The other J3 subtypes are used for other track types (such as air tracks or multi-domain contexts), so they wouldn’t be used to convey a surface track. That’s why the surface track message is J3.3.