4.3 Station Identification Rules: Operating Intervals, Emergency Operations & Station Designators
Key Takeaways
Section 12 requires call sign identification at the beginning and end of each routine transmission and at least every 10 minutes during a transmission lasting longer than 10 minutes.
ACMA guidance for an established routine exchange permits omitting the call sign on intermediate overs, with identification every 10 minutes.
Section 14 requires identification at the beginning and end of transmissions and at least every 30 minutes during a transmission or series lasting more than 30 minutes in emergency services operations or training.
Identify on-air test transmissions with your call sign and use the minimum power needed for the test.
A call sign can be conveyed by English voice, visual image or an internationally recognised code such as Morse.
Identify the station and the operating context
A call sign identifies the station on air. For a class-licensed personal station, check whether the operation is routine or part of an emergency services operation or training exercise. The Class Licence sets out the two timing rules in sections 12 and 14. A separately licensed beacon or repeater follows its own applicable conditions.
| Context | Start and end | During a long transmission |
|---|---|---|
| Ordinary operation, section 12(1) | Give the call sign at the beginning and end of each transmission | At least once every 10 minutes when the transmission lasts more than 10 minutes |
| Emergency services operation or related training, section 14 | Give the call sign at the beginning and end of each transmission | At least once every 30 minutes when the transmission or series of transmissions lasts more than 30 minutes |
For an established routine exchange between stations, ACMA's operating guidance says that the call sign need not be given on every intermediate over. Identify at the opening and close of the exchange and keep the ten-minute identification interval while the exchange continues. A separate new contact starts with identification. Under section 12(2), a person operating under supervision may transmit the supervisor's call sign for routine identification.
Section 12(10) makes section 14 the applicable identification rule when a transmission falls within section 14. Operational labels such as Mobile 1 are used during exercises to identify roles or locations. Give the call sign required by section 14 as well. Joining a routine club net with an emergency theme does not itself make it a training exercise for emergency services.
Work out the timing from your own transmissions
Suppose you make one continuous 23-minute routine transmission. Identify at the beginning, at minutes 9 and 18, and at the end. The gaps are 9, 9 and 5 minutes. Waiting until minute 12 for the first identification after the opening would miss the ten-minute requirement. Another operator repeating your call sign does not fulfil your obligation to transmit it.
For a single 35-minute transmission in an emergency services exercise, identify at the start, again at minute 29, and at minute 35 as you finish. For a series lasting more than 30 minutes, track the same interval across the series. Continue to apply section 14's start and end rule. A tactical identifier helps the net route the message, while your call sign supplies station identification.
Voice, visual and code identification
ACMA guidance describes identification by English voice, visual image or an internationally recognised code such as Morse. If the mode displays a call sign digitally, check that the transmission actually conveys your call sign. A display name or a radio ID number alone should never be assumed to transmit the assigned call sign. For a text-based call to another station, ACMA advises identifying both the station called and your own station.
Use the full phonetic spelling of a call sign when reception is poor. For example, say Victor Kilo Two Alfa Bravo Charlie for VK2ABC. The standard words distinguish letters that can sound similar in noise.
| Letter | Phonetic word | Letter | Phonetic word | Letter | Phonetic word |
|---|---|---|---|---|---|
| A | Alfa | J | Juliett | S | Sierra |
| B | Bravo | K | Kilo | T | Tango |
| C | Charlie | L | Lima | U | Uniform |
| D | Delta | M | Mike | V | Victor |
| E | Echo | N | November | W | Whiskey |
| F | Foxtrot | O | Oscar | X | X-ray |
| G | Golf | P | Papa | Y | Yankee |
| H | Hotel | Q | Quebec | Z | Zulu |
| I | India | R | Romeo |
For a voice call, listen first. State the other station's call sign, then your own. Use CQ as a general call when seeking a contact on a clear simplex frequency. On a repeater, a brief call sign and listening is the usual convention. In Morse, DE means from, and K invites a reply. In a call written as CQ DE VK2ABC K, VK2ABC is calling any station and inviting a response. RX means receiver and TX means transmitter. R acknowledges receipt. A QSO is a contact in common amateur usage.
Read the whole Q-code exchange
Q codes are three-letter abbreviations for common questions and responses. Read the punctuation and context. QTH? asks for location, while QTH Brisbane supplies it. QRM refers to interference, QRN to static and QSB to fading. QSL? asks for acknowledgement, QSY concerns a frequency change and QRT concerns stopping transmission. QRP means decrease power in a procedural exchange. If a station sends QRM, QSY 7.125?, it is reporting interference and proposing a frequency change. Check your operating privileges and whether the new frequency is clear before transmitting there.
Tests and operating designators
ACMA advises using an artificial antenna, also called a dummy load, for tests. If an on-air test is necessary, listen first, use minimum power and identify with your call sign. State that you are testing. A short test still needs identification.
A portable operator may add the local state or territory numeral to the call sign, as in VK6HR portable 8. ACMA describes mobile, maritime mobile and aeronautical mobile as normal operating suffixes for a vehicle, vessel or aircraft. These describe the situation. The class licence band, mode and interference limits still apply.
Which identification times satisfy section 12 for one continuous 23-minute routine class-licensed transmission?
At the start, at 12 minutes and at the end.
At the start, at 9 and 18 minutes, and at the end.
At 9 and 18 minutes only.
At the start and at the end only.
What periodic identification interval applies under section 14 during an emergency services training exercise when a transmission or series lasts more than 30 minutes?
At least once every 30 minutes, in addition to beginning and end identification.
At least once every 60 minutes, in addition to beginning and end identification.
A single identification at the initial check-in covers the entire exercise.
A tactical label every 30 minutes satisfies the call sign requirement.
Which approach follows ACMA guidance when an antenna test must be transmitted on air?
Transmit an unidentified carrier because the test is shorter than 10 minutes.
Listen first, use the minimum power needed, transmit your call sign and indicate that you are testing.
Identify only when another station responds.
Use maximum available power and identify at the end of the testing session.
What does the Morse calling sequence CQ DE VK2ABC K communicate?
A request for VK2ABC to reduce power.
A location query addressed only to VK2ABC.
A general call from VK2ABC inviting a reply.
A confirmation that VK2ABC has already received the message.
Sections you finish are checked off in the contents.