Phraseology and Messages
Quick reference. Phraseology is given primarily in English, which is the normal practice in international oceanic operations. The unit works in both languages1; use Portuguese if the aircraft starts in Portuguese.
Templates, not rules
Constructions without an indicated official source are usage templates. Where a published form exists, it takes precedence.
Variables
CALLSIGN · POSITION · TIME · LEVEL · MACH · NEXT POSITION · ESTIMATE · ENSUING POSITION · UNIT · FREQ
Unit callsign: CENTRO ATLÂNTICO and ATLANTICO CENTER1. Mach number 0.86 is transmitted as MACH ZERO PONTO OITO MEIA and MACH ZERO POINT EIGHT SIX2.
Voice
| Situation | Template |
|---|---|
| Pilot's initial call | ATLANTICO CENTER, CALLSIGN, POSITION at TIME, LEVEL, MACH |
| Reply | CALLSIGN, ATLANTICO CENTER, roger. Maintain LEVEL and MACH. Report POSITION. |
| Confirm datalink | CALLSIGN, confirm CPDLC logon to SBAO. |
| No datalink available | CALLSIGN, no datalink available. Position reports required. |
| Position report | CALLSIGN, POSITION at TIME, LEVEL, MACH, estimating NEXT POSITION at ESTIMATE, next ENSUING POSITION |
| Request a report | CALLSIGN, report position. |
| Complete a report | CALLSIGN, report time over POSITION, present Mach number, next position with estimate and ensuing position. |
| Revised estimate | CALLSIGN, revised estimate NEXT POSITION at ESTIMATE. |
| Next reporting point | CALLSIGN, next report at NEXT POSITION. |
| Level clearance | CALLSIGN, cleared LEVEL. |
| Mach maintenance | CALLSIGN, maintain MACH. |
| Level unavailable | CALLSIGN, unable LEVEL due traffic. Expect LEVEL at POSITION. |
| Transfer | CALLSIGN, contact UNIT on FREQ. |
| No unit ahead | CALLSIGN, no ATC available ahead. Report leaving the FIR. |
RVSM
Official published form, in Portuguese and English3.
| Situation | Portuguese | English |
|---|---|---|
| Controller confirms approval status | CALLSIGN CONFIRME APROVAÇÃO RVSM | CALLSIGN CONFIRM RVSM APPROVED |
| Pilot confirms | CALLSIGN AFIRMATIVO RVSM | CALLSIGN AFFIRMATIVE RVSM |
| Pilot reports not approved | CALLSIGN NEGATIVO RVSM | CALLSIGN NEGATIVE RVSM |
| Turbulence prevents maintaining the level | CALLSIGN NEGATIVO RVSM DEVIDO TURBULÊNCIA | CALLSIGN UNABLE RVSM DUE TURBULENCE |
| Degraded equipment | CALLSIGN NEGATIVO RVSM DEVIDO EQUIPAMENTO | CALLSIGN UNABLE RVSM DUE EQUIPMENT |
| Pilot can resume | CALLSIGN PRONTO PARA REASSUMIR RVSM | CALLSIGN READY TO RESUME RVSM |
| Controller requests that notice | CALLSIGN INFORME PRONTO PARA REASSUMIR RVSM | CALLSIGN REPORT ABLE TO RESUME RVSM |
CPDLC
Do not freely translate standardized elements: Brazil adopts the message set of ICAO Doc 10037 (GOLD)4. Use free text only when no appropriate standardized message exists5.
Official published form6:
| Situation | Portuguese | English |
|---|---|---|
| Connection failure | Falha na CPDLC. Desconecte CPDLC e faça conexão com UNIT. | CPDLC failure. Disconnect CPDLC then logon to UNIT. |
| Datalink failure, continue on voice | Falha na CPDLC. Continue por voz. | CPDLC failure. Continuing on voice. |
| Ground system failure | Todas as aeronaves, falha na CPDLC. Desconecte CPDLC. Continue por voz. | All stations CPDLC failure. Disconnect CPDLC. Continue on voice. |
| Restoration | Todas aeronaves reassumam a operação CPDLC normal. Faça conexão com UNIT. | All stations resume normal CPDLC operations. Logon to UNIT. |
| Automatic transfer failed | Falha de transferência automática CPDLC. Ao entrar na área do UNIT desconecte CPDLC e faça conexão com UNIT. | Automatic transfer of CPDLC failed. When entering UNIT area disconnect CPDLC then logon to UNIT. |
| Message correction | Desconsidere mensagem (tipo) CPDLC, break (autorização corrigida). | Disregard CPDLC (type) message, break (corrected clearance). |
| Suspend requests | CALLSIGN pare o envio de solicitações CPDLC até que seja informado. | CALLSIGN stop sending CPDLC requests until advised. |
If a message goes unanswered after a reasonable period, the prescribed structure is WHEN CAN WE EXPECT (request already sent)7.
Coordination
| Situation | Template |
|---|---|
| Handoff estimate | CALLSIGN, POSITION at ESTIMATE, LEVEL, MACH, route ROUTE, RVSM, RNP 10, ADS-C and CPDLC active, SELCAL ABCD |
| Acceptance | CALLSIGN accepted at LEVEL. |
| Renegotiation | CALLSIGN unable LEVEL due traffic. Available LEVEL or estimate TIME. |
| Revised estimate | CALLSIGN revised estimate POSITION at ESTIMATE. |
| Deviation | CALLSIGN deviating right of track due weather, up to 30 miles, revised estimate POSITION at ESTIMATE. |
| Conflicting traffic | Traffic CALLSIGN and CALLSIGN, same route, LEVEL, estimated POSITION at ESTIMATE and ESTIMATE. |
| Communication failure | CALLSIGN last contact TIME, last confirmed position POSITION, LEVEL, MACH, no contact since. |
What to avoid
| Avoid | Why |
|---|---|
| Treating the ADS-C display as radar contact | There is no radar surveillance, and it misleads the pilot |
| Heading instructions as vectoring | CPDLC is not used for vectoring8 |
| Translating standardized CPDLC elements | The message set is standardized4 |
| Using the published HF frequency as if it were tunable | It is an aeronautical reference, not a network voice channel |
| SELCAL check on first contact with an aircraft on CPDLC | It should not be done at that point unless requested9 |