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Which statements are correct regarding the abbreviation of a call sign?

1.An abbreviation is used only after communication has been established.
2.An abbreviation is used only after ATC has abbreviated it.
3. The call sign BIGJET 334 may be abbreviated.
4. An abbreviation can be used even with similar call signs on frequency.
5. The call sign CESSNA G-BOSH may be abbreviated.
6. An abbreviation is used after any station has previously abbreviated the call sign.

  • A
    1, 3, and 4
  • B
    1, 2, and 5
  • C
    2, 4,and 6
  • D
    3, 5, and 6

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