User avatar
xms3200
Topic Author
Posts: 122
Joined: Sat Apr 30, 2005 7:13 am

Airline pilots monitoring VHF 121.5 or 123.45 Mhz

Wed Dec 05, 2018 1:12 am

I was wondering if airline pilots flying the Boeing/Airbus widebodies or narrow bodies monitor either 121.5 or 123.45 at cruise altitude while flying over water, does it have to do with airline specific operation or ICAO regulations as to what frequency they monitor over a specific region.
 
jetskipper
Posts: 492
Joined: Tue Jun 12, 2001 1:50 am

Re: Airline pilots monitoring VHF 121.5 or 123.45 Mhz

Wed Dec 05, 2018 1:15 am

At my airline, it is company procedure to monitor “Guard” 121.50 at all times inflight and 123.45 when non-radar using HF or CPDLC communication.
Last edited by jetskipper on Wed Dec 05, 2018 1:18 am, edited 1 time in total.
 
AirFiero
Posts: 1325
Joined: Wed Aug 28, 2013 11:43 pm

Re: Airline pilots monitoring VHF 121.5 or 123.45 Mhz

Wed Dec 05, 2018 1:18 am

Many pilots monitor 121.5 over land, as well. It would help locate a downed aircraft quicker and also if someone misses a frequency hand off, ATC can try to reach them on “guard”. I just learned about the latter. I need get in the habit of putting up 121.5 on my second radio for these reasons.
 
DiamondFlyer
Posts: 3115
Joined: Wed Oct 29, 2008 11:50 pm

Re: Airline pilots monitoring VHF 121.5 or 123.45 Mhz

Wed Dec 05, 2018 1:25 am

AirFiero wrote:
Many pilots monitor 121.5 over land, as well. It would help locate a downed aircraft quicker and also if someone misses a frequency hand off, ATC can try to reach them on “guard”. I just learned about the latter. I need get in the habit of putting up 121.5 on my second radio for these reasons.


In the United States, when able, monitoring 121.5 is required by NOTAM.
From my cold, dead hands
 
AirFiero
Posts: 1325
Joined: Wed Aug 28, 2013 11:43 pm

Re: Airline pilots monitoring VHF 121.5 or 123.45 Mhz

Wed Dec 05, 2018 3:30 am

DiamondFlyer wrote:
AirFiero wrote:
Many pilots monitor 121.5 over land, as well. It would help locate a downed aircraft quicker and also if someone misses a frequency hand off, ATC can try to reach them on “guard”. I just learned about the latter. I need get in the habit of putting up 121.5 on my second radio for these reasons.


In the United States, when able, monitoring 121.5 is required by NOTAM.


Required by NOTAM?
 
GalaxyFlyer
Posts: 3541
Joined: Fri Jan 01, 2016 4:44 am

Re: Airline pilots monitoring VHF 121.5 or 123.45 Mhz

Wed Dec 05, 2018 3:37 am

 
gloom
Posts: 307
Joined: Thu Jun 30, 2016 4:24 pm

Re: Airline pilots monitoring VHF 121.5 or 123.45 Mhz

Wed Dec 05, 2018 11:23 am

I was quite sure guard is by default monitored on any plane radio (as a built-in function, not requiring tuning). Anyone able to deny/confirm?

Cheers,
Adam
 
GalaxyFlyer
Posts: 3541
Joined: Fri Jan 01, 2016 4:44 am

Re: Airline pilots monitoring VHF 121.5 or 123.45 Mhz

Wed Dec 05, 2018 11:45 am

Military ones, yes, but I’ve never used a civil one where guard was continuously monitored. A military UHF radio has the normal function of transmit/receive and always receives UHF Guard. Pilot has to make a selection to transmit on 243.0. Civil has to tune 121.5 on a second radio.

GF
 
User avatar
Starlionblue
Posts: 19350
Joined: Fri Feb 27, 2004 9:54 pm

Re: Airline pilots monitoring VHF 121.5 or 123.45 Mhz

Wed Dec 05, 2018 12:13 pm

GalaxyFlyer wrote:
Military ones, yes, but I’ve never used a civil one where guard was continuously monitored. A military UHF radio has the normal function of transmit/receive and always receives UHF Guard. Pilot has to make a selection to transmit on 243.0. Civil has to tune 121.5 on a second radio.

GF


Indeed. We normally have primary on VHF1, guard on VHF1 and data on VHF3. In cases where we need to monitor a second frequency, this goes on VHF2 replacing guard.
"There are no stupid questions, but there are a lot of inquisitive idiots." - John Ringo
 
geologyrocks
Posts: 161
Joined: Sun Nov 13, 2011 12:05 am

Re: Airline pilots monitoring VHF 121.5 or 123.45 Mhz

Thu Dec 06, 2018 2:21 pm

More people would probably keep it on a higher volume if the guard police weren’t so annoying.
 
User avatar
SuseJ772
Posts: 880
Joined: Wed Aug 10, 2005 11:13 am

Re: Airline pilots monitoring VHF 121.5 or 123.45 Mhz

Fri Dec 07, 2018 2:19 am

geologyrocks wrote:
More people would probably keep it on a higher volume if the guard police weren’t so annoying.


You have me intrigued. What is guard police.

I have to admit I never monitor guard when I fly but I probably should.
Currently at PIE, requesting FWA >> >>
 
User avatar
Starlionblue
Posts: 19350
Joined: Fri Feb 27, 2004 9:54 pm

Re: Airline pilots monitoring VHF 121.5 or 123.45 Mhz

Fri Dec 07, 2018 2:25 am

SuseJ772 wrote:
geologyrocks wrote:
More people would probably keep it on a higher volume if the guard police weren’t so annoying.


You have me intrigued. What is guard police.

I have to admit I never monitor guard when I fly but I probably should.


The "guard police" are those guys who will get on your case as soon as you communicate on guard.

Humorously illustrated in this video. https://youtu.be/YoZE0nE60sk?t=193
"There are no stupid questions, but there are a lot of inquisitive idiots." - John Ringo
 
747Whale
Posts: 725
Joined: Fri Dec 07, 2018 7:41 pm

Re: Airline pilots monitoring VHF 121.5 or 123.45 Mhz

Sat Dec 08, 2018 6:17 am

Globally, 121.5 is monitored. Airline aircraft don't have UHF capability to receive or broadcast on 243.
 
arcticcruiser
Posts: 374
Joined: Tue Aug 22, 2017 2:16 pm

Re: Airline pilots monitoring VHF 121.5 or 123.45 Mhz

Mon Dec 10, 2018 2:23 pm

Starlionblue wrote:
SuseJ772 wrote:
geologyrocks wrote:
More people would probably keep it on a higher volume if the guard police weren’t so annoying.


You have me intrigued. What is guard police.

I have to admit I never monitor guard when I fly but I probably should.


The "guard police" are those guys who will get on your case as soon as you communicate on guard.

Humorously illustrated in this video. https://youtu.be/YoZE0nE60sk?t=193


Thanks! Got a good laugh out of this one. So true!

Who is online

Users browsing this forum: B6JFKH81, seat1a and 20 guests

Popular Searches On Airliners.net

Top Photos of Last:   24 Hours  •  48 Hours  •  7 Days  •  30 Days  •  180 Days  •  365 Days  •  All Time

Military Aircraft Every type from fighters to helicopters from air forces around the globe

Classic Airliners Props and jets from the good old days

Flight Decks Views from inside the cockpit

Aircraft Cabins Passenger cabin shots showing seat arrangements as well as cargo aircraft interior

Cargo Aircraft Pictures of great freighter aircraft

Government Aircraft Aircraft flying government officials

Helicopters Our large helicopter section. Both military and civil versions

Blimps / Airships Everything from the Goodyear blimp to the Zeppelin

Night Photos Beautiful shots taken while the sun is below the horizon

Accidents Accident, incident and crash related photos

Air to Air Photos taken by airborne photographers of airborne aircraft

Special Paint Schemes Aircraft painted in beautiful and original liveries

Airport Overviews Airport overviews from the air or ground

Tails and Winglets Tail and Winglet closeups with beautiful airline logos