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E2B11:What is the function of the vertical interval signaling (VIS) code sent as part of an SSTV transmission?

E2B11E2B

What is the function of the vertical interval signaling (VIS) code sent as part of an SSTV transmission?

Direct answer summary (2024-2028 NCVEC pool)

The official correct answer for E2B11 is To identify the SSTV mode being used.

The key fact is To identify the SSTV mode being used. Match that fact to the exact condition in the question; the other choices describe a different rule, band, component, or operating situation.

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