Erasing MMSI number from DSC vhf

I have several times fitted better radios to cars I have owned. But there was been nothing to prevent me selling on the old radio. The old radios did not become worthless when they were taken out of my car.
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As a security measure, the majority of manufacturer-installed car audio systems are key-coded. This code needs to be input at first installation, and at any subsequent time the power connection to the device is broken - without it, the device won't work. Without an accompanying key code, any such radio is worthless.
 
greenalien said:
Without an accompanying key code, any such radio is worthless.
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Not strictly true. Most car radios can be decoded for free by searching in the web or by paying a very modest sum on the likes of eBay.

With or without a code, car stereos are not worth a great deal these days which is a good thing. Lost count of the number I had nicked out of my cars back in the 80's/90's. Just don't hear of it now.
 
yesod said:
shame the 'design by committee' didn't think about what happens when you reflag boats into another country.....
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Going through this at the moment, bought a boat with all Portugese numbers in Lisbon and now been issued with new mmsi and call sign by Ofcom!
Can a navman 7100 be reset anybody know?
My first post on here, great forum!
 
NOAH'SDAD. I've just checked the Navman handbooks where they state that the input of the MMSI number is a once only operation; one exception to this is when using inland waterways in Europe when an ATIS MMSI can and must also be entered; When the ATIS MMSI is switched On the normal MMSI is switched Off, and vice versa .
Specific channels are listed that become available for use on those inland waterways and you are restricted to a 1Watt transmission.
Reading further it states that after the first time entry of the ATIS MMSI you may edit it until confirmed by the second confirming entry(as a password) thereafter it is permanently embedded.
The operation manual I have only refers to the 7200US and 7200EU models though I have the installation guide for the 7100,7200 and 7000 versions.


ianat182
 
MMSI & DSC alarms

Note that within range of Italian transmitters, they seem to use DSC alarms for weather related announcements.
Had to dash down below a few times to turn off and on my Cobra VHF TX/RX.
Due to propagation conditions obtaining sometimes, both Italian and Spanish broadcasts can be heard in French waters, sometimes as far away as Valencia.
 
I had the same problem when I bought my boat the Navman 7100 needed a reset.A kind forumite sent me the method which worked a treat.

Am happy to send by PM if anybody wants it.
 
l'escargot said:
That is a myth. Alarms are as frequent as maydays, how many of those do you hear on an average day?
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It has some basis in fact, in that when shore stations got DSC kit they were keen to use this new toy and sent out Safety alarms before all kinds of routine announcements.

However, those who are holding off from DSC because of this can relax, on the South Coast I haven't heard a pointless alarm for gunnery times etc for years.

Pete
 
prv said:
It has some basis in fact, in that when shore stations got DSC kit they were keen to use this new toy and sent out Safety alarms before all kinds of routine announcements.

However, those who are holding off from DSC because of this can relax, on the South Coast I haven't heard a pointless alarm for gunnery times etc for years.

Pete
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I have a DSC radio on regularly in the Solent and go for days without hearing alarms. If everyone had DSC and used it properly it would be even quieter as it negates the need for calling up on 16 - even radio checks could be done without broadcasting to the whole world.
 
I had to have my Icom reset when the licensing authority had issued the same number to several users. It cost £15 at my local dealer which I was able to reclaim. It needs a special programming unit I was told.
 
Had a similar problem with the Simrad on my last boat. Simrad wanted nearly as much as a new set just to re-programme it.

So now I won't ever be buying Simrad.

However PRS Comms - find them on Ebay, not only re-programmed it for about £30 they also re-assigned the correct frequency set and fully tested the thing, so very well worthwhile.
 
mikemanor said:
Normally the set needs to be returned to an approved retailer to get the MMSI reset - but they can do it.

There are one or two sets that have "hidden menus" allowing a user to reset the MMSI but most do not.
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Yep, hidden menus, most can be obtained online and you can erase the old mmsi and leave it like new for the next boat, I've done it myself a couple of times with Icom sets and Silva. You certainly don't have to pay a dealer large sums of cash for 2 mins work.
 
l'escargot said:
I have a DSC radio on regularly in the Solent and go for days without hearing alarms. If everyone had DSC and used it properly it would be even quieter as it negates the need for calling up on 16 - even radio checks could be done without broadcasting to the whole world.
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+1
 
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