Understanding the Airmail Subject-Date/Time Group

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• Understanding the Airmail Subject-Date/Time Group

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Airmail Subject-Date/Time Group

• W7FLO 201006050830 ICS213
• This is an example of a properly formatted
  Airmail Subject-Date/Time Group
• Note that each section is separated by a hyphen

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Airmail Subject-Date/Time Group

• It consists of 3 components
• 1. W7FLO (County Mnemonic Callsign)
• 2. 201006050745 (YYYYMMDDHHMM)
• 4 digit yr., 2 digit mo., 2 digit date, 2
  digit 24-hour based hr., 2 digit min. (Local
  Time)
• 3. ICS213 (Type of Message)

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Airmail Subject-Date/Time Group

• W7FLO 201006050730 DOE
• W7FLO 201006050745 SITREP
• W7FLO 201006050835 ICS213
• W7FLO 201006051330 QRTRLY RPT
• W7FLO 201006051456 - REQUEST
• W7FLO 201006051845 - ACTIVATION
• W7FLO 201006051920 - SERVICE
• Currently, these 7 are the only templates in use.
  Additional ones may be in development.

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Airmail Subject-Date/Time Group

• W7FLO201006050830 SITREP
• Common mistake
• Callsign not separated from Date-Time section by
  hyphen

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Airmail Subject-Date/Time Group

• W7FLO-201006050830SITREP
• Common mistake variation
• Or, type of message not separated from Date-Time
  section by hyphen

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Airmail Subject-Date/Time Group

• W7FLO201006050830SITREP
• Or, no hyphens at all

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Airmail Subject-Date/Time Group

• W7FLO 20100605 SITREP
• Here, the HHMM section of the date time group
  has been omitted. Sometimes it is the YYYY
  part, or the MMDD part that is missing.

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Airmail Subject-Date/Time Group

• W7FLO 1006050830 ICS213
• Here, only two digits used for the YYYY part of
  the Date-Time group, not the required four.

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Airmail Subject-Date/Time Group

• W7FLO 201006050835L SITREP
• There is no need for an L after the Date-Time
  group all emergency traffic is always expressed
  in local time.

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Airmail Subject-Date/Time Group

• W7FLO 201006050835Z SITREP
• Same issue no need for the Z after the
  Date-Time group. In fact, the Z is incorrect
  whether typed or not all exercise traffic is
  always reported in local time, not UTC (ZULU).

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Airmail Subject-Date/Time Group

• K7BHB 201006050835 ICS213
• The OADN system operator should not use their
  personal callsign use only the County mnemonic
  callsign.

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Airmail Subject-Date/Time Group

• W7FLO 201006050845 ICS213 requesting
  logistics support for bottled water.
• Some people want to append the subject line of
  the transmitted ICS-213 to the Airmail Subject
  Date-Time Group. Please dont do this. The two
  are independent of each other.

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Airmail Subject-Date/Time Group

• Dont use
• //WL2K or R, P, I in the Subject Date-Time
  Group, irrespective of what the Winlink Dev. Team
  says. The OADN is not controlled by the WDT.
• Why?
• Unnecessary makes no difference in msg delivery,
  thus performing no real purpose.
• Adds complexity and potential for errors.
• Defeats the sorting and tracking featureswhich
  is the sole purpose of the use of the Subject
  Date-Time Group.

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Airmail Subject Date/Time Group

• Important!
• YYYYMMDDHHMM
• The Date-Time section must always be a unique
  number thus, each message sent will have a
  unique tracking number for follow-up if
  necessary.
• Avoid the temtation to use the same HHMM for
  all messages prepared in quick succession.
  Increment the MM portion by at least 1, or the
  actual new time, whichever is greater.