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Message from Calico at Tuesday, 02-Nov-10 13:52:13 GMT

Hello there!

For the ex or current Mariner, Captain, Chief Engineer, Radio Officer, Sailor, Passenger or any good person interested in what's happening around the various oceans and seas covered by Global Tuners Radios, here's a possible place to post and exchange information!

Marine communications include both Analogue and Digital transmissions, on all sorts of frequencies and modulations including C and Ku bands.

Busy (and easy) frequencies for Voice Communications are (among many-many others) 2182 kHz (USB) and 156.8 MHz (NFM) from where ship stations get redirected after initial contact to other "working frequencies" if need be.

Here's what one could come across!

http://photos.marinetraffic.com/ais/showphoto.aspx?photoid=224047&size=full

or

http://sidoxia.files.wordpress.com/2009/11/sinking-ship.jpg

- Did you find or hear something interesting on some frequency ?

- Have you found some program that decodes digi-modes nicely for you?


Let's talk about it !

Bon Voyage then and 73

Calico

Message from Calico at Thursday, 11-Nov-10 01:55:35 GMT

Marine VHF channels

All frequencies in MHz and NFM



Ch._ Ship__ Coast

0 156.000 156.000 Private Used by UK HM Coastguard
1 156.050 160.650 duplex
2 156.100 160.700 duplex
3 156.150 160.750 duplex
4 156.200 160.800 duplex
5 156.250 160.850 duplex
6 156.300 157.300 simplex ship to ship
7 156.350 160.950 duplex
8 156.400 157.400 simplex intership (=ship to ship)
9 156.450 156.450 simplex intership
10 156.500 156.500 simplex intership
11 156.550 156.550 simplex
12 156.600 156.600 simplex
13 156.650 156.650 simplex intership
14 156.700 156.700 simplex
15 156.750 156.750 simplex intership
16 156.800 156.800 simplex DISTRESS, SAFETY AND CALLING
17 156.850 156.850 simplex intership
18 156.900 161.500 duplex
19 156.950 161.550 duplex
20 157.000 161.600 duplex
21 157.050 161.650 duplex
22 157.100 161.700 duplex
23 157.150 161.750 duplex
24 157.200 161.800 duplex
25 157.250 161.850 duplex
26 157.300 161.900 duplex
27 157.350 161.950 duplex
28 157.400 162.000 duplex
29 to 36 private, no public correspondence allowed
37 157.850 157.850 private Used by UK Marines and Yacht Clubs
38 to 59 private no public correspondence allowed
60 156.025 160.625 duplex
61 156.075 160.675 duplex
62 156.125 160.725 duplex
63 156.175 160.775 duplex
64 156.225 160.825 duplex
65 156.275 160.875 duplex
66 156.325 160.925 duplex
67 156.375 156.375 simplex inteship UK Coastguard
68 156.425 156.425 simplex
69 156.475 156.475 simplex intership
70 156.525 156.525 smiplex DSC
71 156.575 156.575 simplex
72 156.625 156.625 simplex intership
73 156.675 156.675 simplex intership
74 156.725 156.725 simplex
75 156.775 156.775 simplex
76 156.825 156.825 simplex
77 156.875 156.875 simplex intership
78 156.925 161.525 duplex
79 156.975 161.575 duplex
80 157.025 161.625 duplex UK Marinas
81 157.075 161.675 duplex
82 157.125 161.725 duplex
83 157.175 161.775 duplex
84 157.225 161.825 duplex
85 157.275 161.875 duplex
86 157.325 161.925 duplex
87 157.375 157.375 simplex
88 157.425 157.425 simplex

M2 161.425 161.425 private Used by UK Marinas and Yacht Clubs
ASI 1 162.025 162.025 simplex Automatic Ship Identification (data)
ASI 2 161.975 161.975 simplex Automatic Ship Identification (data)

Relevant Disclaimers:
1) *Not for mariners' reference* please consult ITU tables.
2) Frequency table relevant to UK only

Message from Calico at Thursday, 25-Nov-10 09:23:28 GMT

Very Low Frequencies can have pleasant surprises in store.

Usually automated shift keying modulated transmissions mark allocated frequencies for various Navies.

On the odd occasion though, direct SUBMARINE communications on encrypted A1A take place (Morse) and shortly after automated messages follow.

Here is an A1A message as was captured here in Dorset, UK in the past 24 hours:

"uuu uuu uuu uuu uuu uuu rdndl rdl 361078629036107862903610786290k"

And the videos themselves:
Live Submarine Traffic1-->
http://www.youtube.com/watch?v=bhiMipTMSEs&feature=mfu_in_order&list=UL

Live Submarine Traffic2-->
http://www.youtube.com/watch?v=lJM2O-zhj1U&list=ULl2TEhTbcLTA&playnext=1

If interested in the topic please read comments below these two videos and kindly provide any additional info.
73
Tim

Message from iz0mvn at Tuesday, 03-May-11 17:16:30 GMT

8-156.400 157.400 simplex >>> 156.400 - 156.400
---------------------
70-156.525 156.525 simplex DSC >>> Distress, Digital, No phone mode! (Epirb)
---------------------
ASI 1- 162.025 162.025 simplex - Automatic Ship Identification (or AIS)
ASI 2- 161.975 161.975 simplex - Automatic Ship Identification (or AIS)
Automatic Identification System (AIS)

sorry Tim
Aki

Message from Ray at Wednesday, 16-Nov-11 03:44:47 GMT

its either 5:00 or 6:00 UTC on the HF Charlotte node you can listen to some sort of cargo (i think) vessels on 4.149 mhz USB check in to jacksonville fla. and relay info of the statistics of their travel to their destinations and back...

Message from RadioMuseum at Sunday, 27-Nov-11 02:59:44 GMT

Are the ship to shore radiotelephone channels on Marine VHF used for anything anymore? A lot of frequency pairs involved. I never hear anything while scanning them, even in the summer. Perhaps those channels would get more use in open repeater service around various harbors, public/non-commercial use, given the popularity among recreational boaters of hand-helds with limited range.

Message from iz0mvn at Tuesday, 29-Nov-11 10:09:44 GMT

A lot of frequency pairs is for public service telephone use, not used in simplex but in duplex mode. Aki

Message from iz0mvn at Tuesday, 29-Nov-11 10:23:29 GMT

CH 68 (156.425 simplex) is used H24/7 for meteo-bulletin. Aki.

Message from RadioMuseum at Thursday, 01-Dec-11 17:23:25 GMT

Here in the U.S. along the East Coast, I have found NO public service telephone use of those duplex channels, that many of us knew as the old "radio telephone" or "ship to shore" channels. I wonder if mobile /cellphone has taken their place since it's the same sort of signal range, line-of-sight.

Message from iz0mvn at Tuesday, 06-Dec-11 07:48:48 GMT

Yes, possible; under coast mobile cellphone has taken place of radiotelephone.
73 Aki

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