text: Appendix A
  BASIC WIND DATA MESSAGE [BWD]
  REPORT NUMBER: B001
  GENERAL INSTRUCTIONS: Use to report wind direction and speed in 2,000-meter increments from the surface
  of the earth to an altitude of 30,000 meters. Reference: ATP 2-01.3.
  LINE 1 – DATE AND TIME ________________________________________________(DTG)
  LINE 2 – UNIT _________________________________________________________________(unit making report)
  LINE 3 – TIME OF MEASUREMENT ________________________________________________(DTG of measurement)
  LINE 4 – AREA _____________________________________________________________________(area of validity)
  LINE 5 – LAYER MIKE ____________________________________________________________(layer indicator, downwind
  direction in degrees true, and wind
  speed in kilometers per hour or
  knots)
  LINE 6 – NARRATIVE _____________________________________________(free text for additional information
  required for report clarification)
  LINE 7 – AUTHENTICATION ___________________________________(report authentication)
  Table A-20. Basic wind data message acronym and abbreviation key
  BWD basic wind data
  DTG date-time group