Cruisers Forum
 


Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on Cruisers Forums. Advertise Here
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 22-11-2017, 17:39   #1
Registered User

Join Date: Jan 2015
Location: Great Lakes
Boat: Grampian 26 SOLD! & (pending sea trial) Catalina 42 MkII
Posts: 97
UHF for High Fliers?

I am wondering about the value of keeping a handheld UHF radio on board to contact high fliers while sailing from New York to Gibraltar (as I recall about 400 overflights per day). Although thinking strictly emergency calls on 243.0mHz, bored aircrew monitoring autopilots and position reporting might be an interesting lot to engage for weather info.

Thoughts?
Divevac is offline   Reply With Quote
Old 22-11-2017, 18:46   #2
Moderator Emeritus
 
a64pilot's Avatar

Cruisers Forum Supporter

Join Date: Oct 2013
Location: Jacksonville/ out cruising
Boat: Island Packet 38
Posts: 31,348
UHF for High Fliers?

I have a few and thought about it, but haven’t .
123.45 is the General BS freq. and I believe the International freq for requesting position reporting.
Officially it is I believe used in “Oceanographic regions”
A few of us would fly little airplanes over Oceans on deliveries and sometimes would come up 123.45 and ask an airliner to pass on a position report for us

I believe though that regular civilian aircraft radio is VHF, and all freqs start with 1, UHF is Military only, and all freqs start with 2

Where did you get a UHF radio? Only Military uses those freqs I think.
a64pilot is offline   Reply With Quote
Old 22-11-2017, 19:50   #3
Registered User

Join Date: Jun 2013
Location: canada
Posts: 4,770
Re: UHF for High Fliers?

aircraft band is a different can of worms. I think it's vhf but with AM modulation so normal vhf radio will not work. which is FM mod. even with the right freq.
smac999 is offline   Reply With Quote
Old 22-11-2017, 19:51   #4
Registered User

Join Date: Jun 2013
Location: canada
Posts: 4,770
Re: UHF for High Fliers?

Quote:
Originally Posted by a64pilot View Post

Where did you get a UHF radio? Only Military uses those freqs I think.
the cheap FRS / GMS radios you buy at cosco are UHF...
smac999 is offline   Reply With Quote
Old 22-11-2017, 19:56   #5
Moderator Emeritus
 
a64pilot's Avatar

Cruisers Forum Supporter

Join Date: Oct 2013
Location: Jacksonville/ out cruising
Boat: Island Packet 38
Posts: 31,348
Re: UHF for High Fliers?

I believe my TV will tune some UHF frequencies too, but not aircraft frequencies
a64pilot is offline   Reply With Quote
Old 22-11-2017, 22:47   #6
Moderator and Certifiable Refitter
 
Wotname's Avatar

Join Date: Jan 2008
Location: South of 43 S, Australia
Boat: C.L.O.D.
Posts: 21,361
Re: UHF for High Fliers?

Quote:
Originally Posted by Divevac View Post
I am wondering about the value of keeping a handheld UHF radio on board to contact high fliers while sailing from New York to Gibraltar (as I recall about 400 overflights per day). Although thinking strictly emergency calls on 243.0mHz, bored aircrew monitoring autopilots and position reporting might be an interesting lot to engage for weather info.

Thoughts?
I am unaware of any civilian aircraft using UHF frequencies. The international civilian airband is 118 MHz to 136 MHz, AM with a channel spacing of 25 KHz except European airspace which has 8.33KHz spacing.

Military aircraft has both civilian VHF plus their own UHF frequencies (243 MHz is their guard frequency).

It is usual (or was?) for oceanic commercial airliners to monitor 121.5 MHz - international VHF emergency frequency (AM).
__________________
All men dream: but not equally. Those who dream by night in the dusty recesses of their minds wake in the day to find it was vanity: but the dreamers of the day are dangereous men, for they may act their dreams with open eyes, to make it possible. T.E. Lawrence
Wotname is offline   Reply With Quote
Old 22-11-2017, 22:55   #7
Moderator and Certifiable Refitter
 
Wotname's Avatar

Join Date: Jan 2008
Location: South of 43 S, Australia
Boat: C.L.O.D.
Posts: 21,361
Re: UHF for High Fliers?

Quote:
Originally Posted by a64pilot View Post
.........

Where did you get a UHF radio? Only Military uses those freqs I think.
Ah, no, there are many many users in the UHF band, the vast majority being commercial operators with privately leased frequencies as well as public domain channels
__________________
All men dream: but not equally. Those who dream by night in the dusty recesses of their minds wake in the day to find it was vanity: but the dreamers of the day are dangereous men, for they may act their dreams with open eyes, to make it possible. T.E. Lawrence
Wotname is offline   Reply With Quote
Old 23-11-2017, 00:11   #8
Registered User
 
StuM's Avatar

Cruisers Forum Supporter

Join Date: Nov 2013
Location: Port Moresby,Papua New Guinea
Boat: FP Belize Maestro 43 and OPBs
Posts: 12,891
Re: UHF for High Fliers?

Quote:
Originally Posted by Wotname View Post
Ah, no, there are many many users in the UHF band, the vast majority being commercial operators with privately leased frequencies as well as public domain channels
Yep UHF is a very wide band (300MHz-3000MHz) with a huge range of uses from 2-way radios at the lower end to WiFi networking towards the upper end.
StuM is offline   Reply With Quote
Old 23-11-2017, 00:56   #9
cruiser

Join Date: Nov 2007
Location: Probably in an anchorage or a boatyard..
Boat: Ebbtide 33' steel cutter
Posts: 5,030
Re: UHF for High Fliers?

Listen in or track them for a few dollars

https://www.rtl-sdr.com/about-rtl-sdr/
https://www.rtl-sdr.com/adsb-aircraf...-with-rtl-sdr/
conachair is offline   Reply With Quote
Old 23-11-2017, 05:28   #10
Moderator Emeritus
 
a64pilot's Avatar

Cruisers Forum Supporter

Join Date: Oct 2013
Location: Jacksonville/ out cruising
Boat: Island Packet 38
Posts: 31,348
UHF for High Fliers?

I don’t know about airliners, but almost no civilian monitors 121.5, to do so would mean you have to dedicate a radio for that, and most aircraft only have one or two.
Our Military UHF radio actually had two receivers in it, one was Guard only 243.0 so it was possible to always monitor Guard.
Only time I have ever really tuned 121.5 was if I pranged a Landing and wanted to be sure the ELT hadn’t gone off, or ATC had asked me to check 121.5 cause they were receiving an ELT signal and were trying to get a guess as to its location.
However almost everyone on an Ocean crossing will tune 123.45 as it’s sort of the airplane “net” if you will, or channel 16 thought another way.
VHF radio is very limited in range, so your not using it for ATC on an Ocean crossing, so why not?
a64pilot is offline   Reply With Quote
Old 23-11-2017, 10:50   #11
Registered User

Join Date: Jan 2010
Location: Houston, TX
Boat: Newport 41 MKII/S Carioca
Posts: 27
Re: UHF for High Fliers?

Air carriers normally have two VHF radios. When on the oceanic tracks or over open waters, they will monitor 121.5 and 123.45 when not in VHF comms with ATC. For enroute communications, data link and HF are used. Satellite comms are also used. When in VHF contact with ATC, only 121.5 will be monitored.
carioca is offline   Reply With Quote
Old 23-11-2017, 12:09   #12
Registered User

Join Date: Sep 2014
Posts: 236
Re: UHF for High Fliers?

I once carried a portable transceiver and would attempt to speak to airliners as they'd fly over. Most of the time they wouldn't respond; I don't know if is against their companies policy or if they didn'/don't know it was them that I was calling. It's neat when they do respond, but a bit disconcerting th realize that you've got a couple of weeks of sailing before landfall, whereas the jet only a couple of hours.
boatman1 is offline   Reply With Quote
Old 23-11-2017, 13:01   #13
Registered User

Join Date: Aug 2011
Location: West Sussex, United Kingdom
Boat: Tradewind 33, 33 foot, Parker 27 , 26 foot
Posts: 496
Re: UHF for High Fliers?

Airline crew monitor 121.5 on their second radio, particularly when flying over remote regions (oceans, deserts and large continents with little comms such as Africa and Australia). They do not have the ability to listen out or transmit on UHF frequencies.
Martkimwat is offline   Reply With Quote
Old 23-11-2017, 15:23   #14
Moderator and Certifiable Refitter
 
Wotname's Avatar

Join Date: Jan 2008
Location: South of 43 S, Australia
Boat: C.L.O.D.
Posts: 21,361
Re: UHF for High Fliers?

Quote:
Originally Posted by a64pilot View Post
I don’t know about airliners, but almost no civilian monitors 121.5, ......
Hmm... I thought airliners were civilian ...


But yes, I understand what you mean and I concur.

It does appear that from other posts that airline traffic (i.e. RPT, wide bodied etc) do still monitor 121.5 & 123.45 on long haul flights when beyond VHF ATC range while general aviation and regional airline traffic have no call to or (in some instances), the ability to do so.

What this really means for the OP, the answer to his question is "No, don't bother to get a UHF to communicate with air traffic; cause it won't work"
__________________
All men dream: but not equally. Those who dream by night in the dusty recesses of their minds wake in the day to find it was vanity: but the dreamers of the day are dangereous men, for they may act their dreams with open eyes, to make it possible. T.E. Lawrence
Wotname is offline   Reply With Quote
Old 23-11-2017, 18:20   #15
Moderator Emeritus
 
a64pilot's Avatar

Cruisers Forum Supporter

Join Date: Oct 2013
Location: Jacksonville/ out cruising
Boat: Island Packet 38
Posts: 31,348
UHF for High Fliers?

If you just want to talk, maybe ask about the weather etc.,, use 123.45
Do not use 121.5 for anything unless it’s real important like a Mayday.
Bet the pilots would get a kick out of talking to a sailboat.
Longest leg flown regularly by aircraft is apparently California to Hawaii.
A friend of mine years ago was delivering a crop duster from the US to Australia, first real leg to Hawaii of course.
Right after leaving California he made a call on five fingers what 123.45 is called and asked to pass on a position report, the airliner did.
Long time later upon getting close to Hawaii, he called another airliner to pass on a position report, the Pilot wanted do know how many crop dusters were there over the Pacific, John responded just me I think, why?
Airliner responded cause we passed a position report for one of you guys yesterday on the way here, John answered yeah, that was me
The airliner guys had landed the day before, slept and were on the way back, John was still chugging along, with no Autopilot, sort of like Lindbergh but with a GPS.
a64pilot is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
VHF / UHF HAM Radio Antenna ... and AIS? s/v Jedi Marine Electronics 72 11-05-2019 08:51
Sailing Hams: VHF/UHF? Dockhead Marine Electronics 22 11-04-2014 11:58
VHF/UHF Ham Radio On Board? Dockhead Marine Electronics 20 28-08-2013 03:56

Advertise Here


All times are GMT -7. The time now is 08:10.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.