T2C Emergency communications, nets, and messages

Public service: emergency operations, applicability of FCC rules, RACES and ARES, net and traffic procedures, operating restrictions during emergencies, use of phonetics in message handling

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This group covers the organizations and procedures used when amateurs support public service and emergencies: RACES, ARES, nets, Winlink, phonetics, and formal message handling.

FCC rules always apply

Part 97 applies to every amateur station at all times, including when operating for RACES, ARES, FEMA or any other group. Those organizations add procedures but cannot suspend FCC rules.

The one exception for privileges is §97.403: an amateur station may use any means of radio communication at its disposal to meet essential communication needs connected with the immediate safety of human life and protection of property when normal communication systems are not available. That is the only case where operating outside the privileges of your license class is acceptable; a FEMA or RACES plan does not grant it.

RACES and ARES

	RACES	ARES
Full name	Radio Amateur Civil Emergency Service	Amateur Radio Emergency Service
What it is	An FCC Part 97 service for civil defense communications during emergencies	A group of licensed amateurs who volunteer their qualifications and equipment for public-service communications
Certification	Requires certification by a civil defense agency	No civil defense certification

SKYWARN (weather spotting) and MARS (military auxiliary) do not require civil defense certification.

Nets

A net is an on-air meeting of stations. The net control station calls the net to order and directs communications between stations checking in. Standard practice for participants:

Check in with your call sign when first responding, not a name and address.
Transmit only when directed by net control, unless reporting an emergency. This is the core rule of net discipline.

Recording the time of each of your own transmissions is not a standard net requirement.

Traffic means formal messages that net stations pass along.

Phonetics

When a voice message includes unusual words or call signs, spell them with a standard phonetic alphabet (Alpha, Bravo, Charlie, and so on). This helps ensure correct reception in poor conditions.

Winlink

Winlink is a radio email system that relays messages through gateway stations using email addresses based on amateur call signs. It is not a digital mode like FT8 or PSK31, although it can use digital modes to carry messages.

Formal messages (radiograms)

A radiogram has a preamble (or header), address, text, and signature. The preamble contains the information needed to track the message, such as the message number, precedence, handling instructions, station of origin, check, place of origin, and time and date.

The check is the number of words or word equivalents in the text of the message. A receiving station counts the words and compares them to the check to confirm it copied everything.

Key facts to memorize

§97.403: any means necessary only for immediate safety of human life or protection of property, when normal communications are unavailable
At a net: transmit only when net control directs you, unless reporting an emergency
FCC Part 97 always applies, including during RACES and ARES activity
RACES: civil defense service, certified by a civil defense agency
ARES: volunteer registration of qualifications and equipment
Net control: opens the net and directs traffic among check-ins
Traffic: formal messages passed by net stations
Check: number of words or word equivalents in the message text
Phonetic alphabet for unusual words
Winlink: radio email using call-sign-based addresses

Memory hooks

RACES has “Civil” in its name, so the civil defense agency certifies it.

Questions in this group (12): answers shown

T2C01 · §97.103(a)

When do the FCC Part 97 Amateur Radio Service rules NOT apply to the operation of an amateur station?
- A. When operating under RACES rules
- B. When operating under FEMA rules
- C. When operating under ARES rules
- D. FCC rules always apply ✓ Correct answer
FCC Part 97 rules always apply to an amateur station, whether it is operating for RACES, ARES, FEMA or any other group. Those organizations add their own procedures but never suspend the FCC rules.
T2C02

Which of the following are typical duties of a Net Control Station?
- A. Choose the regular net meeting time and frequency
- B. Ensure that all stations checking into the net are properly licensed for operation on the net frequency
- C. Call the net to order and direct communications between stations checking in ✓ Correct answer
- D. All these choices are correct
A net control station calls the net to order and directs communications among the stations checking in. The sponsoring group usually picks the net's time and frequency, and each operator, not net control, is responsible for being properly licensed.
T2C03

What technique is used to ensure that voice messages containing unusual words are received correctly?
- A. Send the words by voice and Morse code
- B. Use the Q-code “QSR” to ask the receiving station to repeat the words back
- C. Spell the words using a standard phonetic alphabet ✓ Correct answer
- D. All these choices are correct
Spelling unusual words with a standard phonetic alphabet helps ensure accurate reception by voice. Sending the words in Morse code as well is not a standard practice, and QSR is not a request to repeat words back.
T2C04

What is RACES?
- A. An emergency organization combining amateur radio and citizens band operators and frequencies
- B. An international radio experimentation society
- C. A radio contest held in a short period, sometimes called a “sprint”
- D. An FCC Part 97 amateur radio service for civil defense communications during national emergencies ✓ Correct answer
RACES is the Radio Amateur Civil Emergency Service, an FCC Part 97 service for civil defense communications during national or other emergencies. It is not a CB combination, a contest, or an experimentation society.
T2C05

What does the term “traffic” refer to in net operation?
- A. Formal messages exchanged by net stations ✓ Correct answer
- B. The number of stations checking in and out of a net
- C. Operation by mobile or portable stations
- D. A count of the number of activations of the net each month
In net operation, traffic means formal messages that stations pass along, such as radiograms. It does not refer to check-in counts, mobile operation, or monthly activation statistics.
T2C06

What is the Amateur Radio Emergency Service (ARES)?
- A. A group of licensed amateurs who have voluntarily registered their qualifications and equipment for communications duty in the public service ✓ Correct answer
- B. A group of licensed amateurs who are members of the military and who voluntarily agreed to provide message handling services in the case of an emergency
- C. A training program that provides licensing courses for those interested in obtaining an amateur license to use during emergencies
- D. A training program that certifies amateur operators for membership in the Radio Amateur Civil Emergency Service
ARES is a group of licensed amateurs who have voluntarily registered their qualifications and equipment for public-service emergency communications. It is not a military group or a licensing course, and it does not certify people for RACES.
T2C07

Which of the following is standard practice when you participate in a net?
- A. When first responding to the net control station, transmit your call sign, name, and address as in the FCC database
- B. Record the time of each of your transmissions
- C. Unless you are reporting an emergency, transmit only when directed by the net control station ✓ Correct answer
- D. All these choices are correct
Unless you have an emergency to report, transmit only when net control directs you; that keeps the net orderly. The other choices are not standard: checking in needs your call sign, not your name and full address from the FCC database, and you do not need to record the time of each transmission.
T2C08

Which of the following relays messages using email addresses based on amateur callsigns?
- A. Winlink ✓ Correct answer
- B. FT8
- C. PSK31
- D. AMTOR
Winlink is a radio email system that relays messages through gateway stations using email addresses based on amateur call signs. FT8, PSK31 and AMTOR are digital modes, but none provides this kind of email service.
T2C09

Are amateur station control operators ever permitted to operate outside the frequency privileges of their license class?
- A. No
- B. Yes, but only when part of a FEMA emergency plan
- C. Yes, but only when part of a RACES emergency plan
- D. Yes, but only in situations involving the immediate safety of human life or protection of property ✓ Correct answer
A control operator may operate outside the license class privileges only when necessary for the immediate safety of human life or protection of property (§97.403). A FEMA or RACES plan does not extend privileges.
T2C10

What information is contained in the preamble of a formal traffic message?
- A. The email address of the originating station
- B. The address of the intended recipient
- C. The telephone number of the addressee
- D. Information needed to track the message ✓ Correct answer
The preamble of a formal traffic message holds the information needed to track it, such as the message number, precedence, station of origin, check, place of origin, and time and date. The address of the recipient is a separate part of the message.
T2C11

What is meant by “check” in a radiogram header?
- A. The number of words or word equivalents in the text portion of the message ✓ Correct answer
- B. The call sign of the originating station
- C. A list of stations that have relayed the message
- D. A box on the message form that indicates that the message was received and/or relayed
In a radiogram header, the check is the number of words (or word equivalents) in the text of the message. It lets a receiving station confirm it copied the whole text. It is not a call sign, a relay list, or a checkbox.
T2C12

Which of the following requires certification by a civil defense agency?
- A. ARES
- B. RACES ✓ Correct answer
- C. MARS
- D. SKYWARN
RACES requires certification by a civil defense agency, since it operates under civil defense authority. ARES, MARS and SKYWARN do not require that kind of certification, though each has its own membership practices.