Operating signals for abbreviated maritime communications
This article does not cite any sources. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. Find sources: "Maritime Mobile Service Q Codes" – news · newspapers · books · scholar · JSTOR(March 2015) (Learn how and when to remove this message)
The Maritime Mobile Service Q Codes are art of a larger set of Q Codes designated by the ITU-R. The QOA–QQZ code range is reserved for the Maritime Mobile Service.
This assignment is specified in RECOMMENDATION ITU-R M.1172.
Q signals are no longer substantially used in the maritime service. Morse code is now very rarely used for maritime communications, but in isolated maritime regions like Antarctica and the South Pacific the use of Q Codes continues. Q Codes still work when HF voice circuits are not possible due to atmospherics and the nearest vessel is one ionospheric hop away.
From ITU Radio Regulations 1990, Appendix 14: Miscellaneous Abbreviations and Signals to Be Used for Radiocommunications in the Maritime Mobile Service.
Question ?
Answer or Advice
QOA
Can you communicate by radiotelegraphy (500 kHz)?
I can communicate by radiotelegraphy (500 kHz).
QOB
Can you communicate by radiotelephony (2182 kHz)?
I can communicate by radiotelephony (2182 kHz).
QOC
Can you communicate by radiotelephony (channel 16 - frequency 156.80 MHz)?
I can communicate by radiotelephony (channel 16 - frequency 156.80 MHz).
QOD
Can you communicate with me in ... 0. Dutch 5. Italian 1. English 6. Japanese 2. French 7. Norwegian 3. German 8. Russian 4. Greek 9. Spanish?
I can communicate with you in ... 0. Dutch 5. Italian 1. English 6. Japanese 2. French 7. Norwegian 3. German 8. Russian 4. Greek 9. Spanish.
QOE
Have you received the safety signal sent by ... (name and/or call sign)?
I have received the safety signal sent by ... (name and/or call sign).
QOF
What is the commercial quality of my signals?
The quality of your signals is ... 1. not commercial 2. marginally commercial 3. commercial.
QOG
How many tapes have you to send?
I have ... tapes to send.
QOH
Shall I send a phasing signal for ... seconds?
Send a phasing signal for ... seconds.
QOI
Shall I send my tape?
Send your tape.
QOJ
Will you listen on ... kHz (or MHz) for signals of emergency position-indicating radio beacons?
I am listening on ... kHz (or MHz) for signals of emergency position-indicating radio beacons.
QOK
Have you received the signals of an emergency position-indicating radio beacon on ... kHz (or MHz)?
I have received the signals of an emergency position-indicating radiobeacon on ... kHz (or MHz).
QOL
Is your vessel fitted for reception of selective calls? If so, what is your selective call number or signal?
My vessel is fitted for the reception of selective calls. My selective call number or signal is ...
QOM
On what frequencies can your vessel be reached by a selective call?
My vessel can be reached by a selective call on the following frequency/ies ... (periods of time to be added if necessary).
QOO
Can you send on any working frequency?
I can send on any working frequency.
QOT
Do you hear my call; what is the approximate delay in minutes before we may exchange traffic?
I hear your call; the approximate delay is ... minutes.
and 22 Related for: Maritime Mobile Service Q Codes information
The MaritimeMobileServiceQCodes are art of a larger set of QCodes designated by the ITU-R. The QOA–QQZ code range is reserved for the Maritime Mobile...
issued unused Q-Codes as their ITU prefix e.g. Qatar is QAT. Codes in the range QAA–QNZ are reserved for aeronautical use; QOA–QQZ for maritime use and QRA–QUZ...
defines mobile country codes (MCC) as well as mobile network codes (MNC). The mobile country code consists of three decimal digits and the mobile network...
code abbreviations, which consist mainly of brevity codes that convey messages to other parties with greater speed and accuracy. However, some codes are...
1959, and in 1969 specified that it be "for application in the maritimemobileservice only". Pronunciation was not defined prior to 1959. For the post-1959...
carried over from former commercial telegraph codes, almost all Morse abbreviations are not commercial codes. From 1845 until well into the second half of...
originally established for maritime use. In formal notation SOS is written with an overscore line (SOS), to indicate that the Morse code equivalents for the...
International code and the four unique Gerke codes into the local alphabet, hence Greek, Hebrew, Russian, and Ukrainian Morse codes. If more codes are needed...
Radiotelegraphy Communications Except in the MaritimeMobileService, and are also described identically in ACP131(F),: The QSK code is one of the earliest signal reporting...
Signals to Be Used in Radiotelegraphy Communications Except in the MaritimeMobileService. They are also described identically in ACP131(F),: Amateur radio...
such as the use of abbreviated codes like the CB radio ten-code, Qcodes in amateur radio and aviation, police codes, etc., and jargon. Some elements...
international access code. Within the system of country calling codes, the ITU has defined certain prefixes for special services, and assigns such codes for independent...
abbreviations were used, including a set of "Qcodes" specified by the 1912 Service Regulations. Article XXI of the Service Regulations required that whenever an...
its spreading codes with other base stations to facilitate inter-cell handoff and support hybrid GPS/cellular position detection for mobile emergency calls...
silence or emissions control (EMCON) is a status in which all fixed or mobile radio stations in an area are asked to stop transmitting for safety or security...
band radio Family Radio Service Public Radio Service General Mobile Radio Service KDR 444 LPD433 Mobile rig Multi-Use Radio Service PMR446 UHF CB (Australia)...
two-way radio services (such as maritime, aviation, taxis, etc.). The amateur radio service (amateur service and amateur-satellite service) is established...
2022). "Starlink For Boats! - SpaceX Announces Starlink Maritime, with Eye-Popping Price". Mobile Internet Resource Center. Archived from the original on...
South Africa where best weather was provided by SAMNet (South African MobileMaritime Net). 802.11 "WiFi" ALE (Automatic Link Establishment) APRS (Automatic...
hand-held flags replacing the mechanical arms of shutter semaphores) in the maritime world in the 19th century. It is still used during underway replenishment...