msponer,
Sorry to be coming in a couple days late...
But, I do have some helpful info for you!
Quote:
Originally Posted by msponer
If we wanted to leave our SSB on while at sea, what frequency(s) should we monitor: 2182? The twice daily net we will check in on?
We have a Sailor HF4500B SSB, which has DSC. The automatic squelch works well enough that it doesn't bother us with static noises.
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Quote:
Originally Posted by msponer
Ahh, OK, I was thinking of leaving the SSB on to be a good neighbor. Like we leave the VHF on when we are anchored. There seems to be about a dozen boats on the way to New Zealand, and I figure that if someone has a problem it'd be nice if they can reach out at times other than the morning and late afternoon nets. But this area is well covered by Kiwi Radio and so there is probably little need to talk to us or another random sailboat. I don't want to listen for entertainment, to hear random conversations with aircraft or etc.
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1) First off, please be aware that Sailor produced TWO versions of the HF4500...
http://cirspb.ru/pdf/4500.pdf
--- One has only a single-channel MF-DSC receiver (on 2187.5khz), and was their most popular version (mainly for the EU and "coastal" markets, where Sea Area A2 GMDSS requirements were all that was needed)
--- The other had a mult-freq scanning MF/HF-DSC receiver, for Sea Area A3 and A4 GMDSS requirements...
Whether or not you have the available
electrical power on-board, and/or the desire to monitor some HF SSB Voice frequency, you might want to determine which version 4500 you have, so that you can make a determination of how much of a "good neighbor" you'd be....
2) Secondly, while others have pointed out that most cruisers do not maintain any
HF radio watch at all (damn near none), except for their
weather nets, cruisers nets, etc...
Some sailing in rallies, and/or even just friends heading in the same general direction DO still try to maintain an
HF radio watch....(especially if the Voice Squelch function works well)
I have written about all of this previously, in quite detail....
And, all the answers can be found in the links in the sticky above...
http://www.cruisersforum.com/forums/...tc-133496.html
And, specifically, here is a great discussion about HF freq/channel choice...
HF Radio Freqs, summertime Atlantic crossing, offshore Net..
I personally would suggest an 8mhz freq for boats sailing along a particular
route / in the same geographic area, for a wider coverage area....
Less
noise, typically stronger signals, than the lower freqs....but you can find some "skip zones" exist near sunset and after dark, so 6mhz would be secondary...
And, a 12mhz freq, if you desire longer range comms (beyond 500 miles daytime)...
8291.0khz is the international GMDSS
Safety and Calling freq in the 8mhz
marine band, and would be my suggestion for monitoring, if you only have the capability to monitor onw HF freq....
This would work well for contacting other vessels that also choose to monitor this freq (they would all need to know ahead of time), that are within a few hundred miles of you almost 24/7....
Also, this freq is monitored by the Australian Maritime
Safety Authority (AMSA) and New Zealand Maritime Safety Authority (and USCG), and would work well, for those boats not equipped with HF-DSC, when in range of those stations...
Australian marine comms
The maritime radio service for New Zealand - Maritime NZ
HF Marine Communications in Tasmania - MAST MAST
Brunei Bay Radio - HF/SSB radio email for isolated locations in SE Asia, the North West Pacific and Indian Oceans. The low-cost and reliable alternative to satellite email for isloated or remote locations, islands, communities, tourism, conservation,
About the GMDSS - Australian Maritime Safety Authority (AMSA)
HF Marine Radio Services
But, like all things in life, there are some trade-offs...
In order to make an exact recommendation, this is where I would need to know where you are sailing and who else may be around, and how far away they would be...
Tough questions, as everyone
sails a different course, different speed, etc. and everyone departs at different times....
So, in order for you to figure this out on your own....here are the general rules-of-thumb:
--- 16mhz for long-range daytime comms...(700 - 5000+ miles)
[16420.0khz is the 16mhz international GMDSS Voice SSB Safety and Calling freq]
--- 12mhz for long-range comms, across oceans, etc. (500 to 5000 miles, daytime....usable in early evenings as well)
[12290.0khz is the 12mhz international GMDSS Voice SSB Safety and Calling freq]
--- 8mhz for medium range comms, regionally (0 - 500 miles, daytime....200 to 5000 miles, nighttime)
[82
91.0khz is the 8mhz international GMDSS Voice SSB Safety and Calling freq]
--- 6mhz for medium range comms, especially early morning and near sunset (0 - 300 miles, daytime....100 to 3000 miles, nighttime)
[6215.0khz is the 6mhz international GMDSS Voice SSB Safety and Calling freq]
--- 4mhz for shorter-range comms (0 - 200 miles daytime, 100 to 3000 miles, nighttime)
[4125.0khz is the 4mhz international GMDSS Voice SSB Safety and Calling freq]
So, you see....if all you desire is to maintain an HF Voice SSB radio watch for other boats like yours, in your regional area, who would want to stay in contact (and/or are not equipped with HF-DSC), then 8291.0 is a good freq to maintain watch on....and once you've made contact there, you'd move off to 8294.0 or 8297.0 (or some other band if necessary) for further traffic...
If you desire to contact / maintain an HF SSB Voice radio watch, for boats traveling farther than a few hundred miles, try 12290.0khz....
(although, for my personal taste, for those sailing across the Atlantic, we used to use 12359.0khz...which was Herb's weather net freq....but, since he's retired, if all you wish is to have a radio watch freq, NOT a net freq, then use 12290.0khz...)
Have a look at these YouTube playlists...
HF-DSC Comms...
https://www.youtube.com/playlist?lis...ga2zYuPozhUXZX
Maritime HF Comms...
https://www.youtube.com/playlist?lis...ZDo_Jk3NB_Bt1y
And, if you(and/or anyone else) desires a video explaining freq/channel choice....have a look here...
And, for explanation of the GMDSS SSB voice freqs...
I hope this helps...
Fair winds...
John