This is great information . I will be picking up my new 802 this weekend and have also ordered a furono Fax-408 . I guess this technology is going to be around for a long time , I hope .
Thanks for the detailed explanation, Captain. I may have missed it, but why were you calling the USCG November Mike November? Why NMN? Or were they named NMN in the radio list? Thanks
Sergii, You're very welcome! I'm glad to have helped. And, be sure to have a look at the whole HF-DSC playlist. czcams.com/play/PLnN6ygtZ3h2n3z5nlv-ga2zYuPozhUXZX.html As well as my other playlists, that cover various communications subjects, sailing, etc. czcams.com/users/captainjohn49playlists As for calling "November Mike November" (NMN) this is the callsign of the US Coast Guard area master station in Chesapeake Virginia. The US Coast Guard has many two-way HF communications stations (Miami, New Orleans, Virginia, California, Hawaii, Guam, and Kodiak AK) and most are remotely monitored and controlled. In the old days when they actually monitored HF-SSB Voice (now they only monitor HF-DSC, then switching to two-way SSB Voice AFTER initial signaling/contact via HF-DSC), if calling a "MayDay", etc., you could certainly have just called "US Coast Guard, MayDay, MayDay, Mayday.....", etc. And, of course, out of habit of about 50 years of radio communications experience, using a station's callsign / calling a station by their callsign is always the proper way. :) And, when some the guy on the other end is a trained radio op, they are of course trained to recognize their callsign as easily as their own personal name! :) But, in this instance while I was making a general "Safety" DSC call to the US Coast Guard (using their all stations US Coast Guard MMSI # of 003669999), since the time and distance between myself and them and using the 12mhz DSC channel, I knew that I would be within easy communications range of NMN in Virginia, so to better assist them (USCG) in recognizing which station I was actually calling and to better aide them in responding I called "November Mike November". Again, if you're in Distress and calling a MayDay, you really won't need to worry about the other station's callsign... But, it is just common use / habit for me. :) BTW....PLEASE remember that HF-DSC is of vital importance everywhere these days! As the US Coast Guard has joined the other > 80 HF Maritime Coast stations worldwide that have HF-SSB Voice capabilities, but no longer monitor HF-SSB Voice, and rather now maintain a 24/7/365 radio watch-standing on HF-DSC only! (the only maritime stations left in the world that still monitor HF-SSB Voice, as well as HF-DSC, are one in New Zealand and two in Australia....and, they are heading to DSC-only monitoring in coming years) I hope this helps and answers your questions. 73, John
Thanks. Be sure to watch all the videos in the playlist. czcams.com/play/PLnN6ygtZ3h2n3z5nlv-ga2zYuPozhUXZX.html And, depending on your needs, there are other playlists that you may find helpful, too. czcams.com/users/captainjohn49playlists Fair winds, John
These GMDSS DSC frequencies were established in 1992, and fully implemented by Jan 1999, by the IMO / SOLAS conventions. (2187.5khz, 4207.5khz, 6312khz, 8414.5khz, 12577khz, and 16804.5khz) I hope you have watched the entire HF-DSC Playlist, as all of this is explained in the videos? If you haven't, please do so, or even better study up on the GMDSS. :) czcams.com/play/PLnN6ygtZ3h2n3z5nlv-ga2zYuPozhUXZXAlso.html, please read these pages for other info: www.navcen.uscg.gov/?pageName=cgcommsCall www.shipcom.com/frequencies.html And, in brief, if your question was why did I choose 12577khz, to call WLO?? This is because at that time, it was the best choice between the two choices (8414.5 or 12577) that they monitor 24hrs/day....and at that time-of-day, was also the best choice for a DSC call to the USCG (who monitor all of these 24hrs/day: 4207.5, 6312, 8414.5, 12577, 16804.5)....Frequency choice is touched on briefly in these HF-DSC Videos, but is discussed at length in the other videos... Please have a look here...czcams.com/play/PLnN6ygtZ3h2nPNdApNsZDo_Jk3NB_Bt1yAlso.html, be aware that with today's solar cycle on the down-swing, you will most likely find the next lower frequency band (8mhz vs. 12mhz) to be very useful even for daytime use over distances up to 1000 miles or more....
This is great information . I will be picking up my new 802 this weekend and have also ordered a furono Fax-408 . I guess this technology is going to be around for a long time , I hope .
Thanks for making this video. I'm study for my GROL, and I found this very useful.
Thanks
Thanks for the detailed explanation, Captain. I may have missed it, but why were you calling the USCG November Mike November? Why NMN? Or were they named NMN in the radio list? Thanks
Sergii,
You're very welcome! I'm glad to have helped.
And, be sure to have a look at the whole HF-DSC playlist.
czcams.com/play/PLnN6ygtZ3h2n3z5nlv-ga2zYuPozhUXZX.html
As well as my other playlists, that cover various communications subjects, sailing, etc.
czcams.com/users/captainjohn49playlists
As for calling "November Mike November" (NMN) this is the callsign of the US Coast Guard area master station in Chesapeake Virginia.
The US Coast Guard has many two-way HF communications stations (Miami, New Orleans, Virginia, California, Hawaii, Guam, and Kodiak AK) and most are remotely monitored and controlled.
In the old days when they actually monitored HF-SSB Voice (now they only monitor HF-DSC, then switching to two-way SSB Voice AFTER initial signaling/contact via HF-DSC), if calling a "MayDay", etc., you could certainly have just called "US Coast Guard, MayDay, MayDay, Mayday.....", etc.
And, of course, out of habit of about 50 years of radio communications experience, using a station's callsign / calling a station by their callsign is always the proper way. :)
And, when some the guy on the other end is a trained radio op, they are of course trained to recognize their callsign as easily as their own personal name! :)
But, in this instance while I was making a general "Safety" DSC call to the US Coast Guard (using their all stations US Coast Guard MMSI # of 003669999), since the time and distance between myself and them and using the 12mhz DSC channel, I knew that I would be within easy communications range of NMN in Virginia, so to better assist them (USCG) in recognizing which station I was actually calling and to better aide them in responding I called "November Mike November".
Again, if you're in Distress and calling a MayDay, you really won't need to worry about the other station's callsign...
But, it is just common use / habit for me. :)
BTW....PLEASE remember that HF-DSC is of vital importance everywhere these days!
As the US Coast Guard has joined the other > 80 HF Maritime Coast stations worldwide that have HF-SSB Voice capabilities, but no longer monitor HF-SSB Voice, and rather now maintain a 24/7/365 radio watch-standing on HF-DSC only!
(the only maritime stations left in the world that still monitor HF-SSB Voice, as well as HF-DSC, are one in New Zealand and two in Australia....and, they are heading to DSC-only monitoring in coming years)
I hope this helps and answers your questions.
73,
John
good video
Thanks. Be sure to watch all the videos in the playlist. czcams.com/play/PLnN6ygtZ3h2n3z5nlv-ga2zYuPozhUXZX.html And, depending on your needs, there are other playlists that you may find helpful, too. czcams.com/users/captainjohn49playlists Fair winds, John
Thanks. Be sure to watch the entire HF-DSC Communications playlist.czcams.com/play/PLnN6ygtZ3h2n3z5nlv-ga2zYuPozhUXZX.html
Why did you choose tjose frequencies ?
These GMDSS DSC frequencies were established in 1992, and fully implemented by Jan 1999, by the IMO / SOLAS conventions. (2187.5khz, 4207.5khz, 6312khz, 8414.5khz, 12577khz, and 16804.5khz) I hope you have watched the entire HF-DSC Playlist, as all of this is explained in the videos? If you haven't, please do so, or even better study up on the GMDSS. :) czcams.com/play/PLnN6ygtZ3h2n3z5nlv-ga2zYuPozhUXZXAlso.html, please read these pages for other info: www.navcen.uscg.gov/?pageName=cgcommsCall www.shipcom.com/frequencies.html And, in brief, if your question was why did I choose 12577khz, to call WLO?? This is because at that time, it was the best choice between the two choices (8414.5 or 12577) that they monitor 24hrs/day....and at that time-of-day, was also the best choice for a DSC call to the USCG (who monitor all of these 24hrs/day: 4207.5, 6312, 8414.5, 12577, 16804.5)....Frequency choice is touched on briefly in these HF-DSC Videos, but is discussed at length in the other videos... Please have a look here...czcams.com/play/PLnN6ygtZ3h2nPNdApNsZDo_Jk3NB_Bt1yAlso.html, be aware that with today's solar cycle on the down-swing, you will most likely find the next lower frequency band (8mhz vs. 12mhz) to be very useful even for daytime use over distances up to 1000 miles or more....
Thank you very much for your quick reply. I could not wish for any clrearer answer. Thank you!