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Originally Posted by Tim M
On a handheld unit you're limited to 5 watts of transmission power which isn't very much and very much limits the effectiveness of the system
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You've been around here and boats long enough to presumably know that:
- there are 6W H/Held radios around
- the power isn't the limiting factor for a h/held - it is the height of the antenna
However your general point that range is not great is valid, and for someone with a functioning H/Held VHF, a PLB may be a better "addition" that the DSC "upgrade".
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(DSC was a nice idea when originally thought out, in reality it is seldom used for the purpose it was originally designed for).
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Probably true that mobile phones have usurped a lot of the anticipated need for DSC, but I do have much more confidence in my crew correctly following the hit red button approach than voice comms in the panic situation that my incapacitation would surely bring.
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In any case, sounds like you may need to re-do your VHF Short Range Certificate.
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does it?
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A PLB attached to your lifejacket will send your GPS position to the coastguard;
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eventually! the time from magic button to someone in the "local" ops room getting it is considerably longer for a PLB than a DSC.
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they respond to every transmission so you are much more likely (in my opinion) to be sure of receiving assistance.
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To be clear to the unaware, by "respond", Tim means investigate, not that the person in distress gets any direct feedback (which means you have no idea if the signal did or did not reach someone). They also won't necessarily send the cavalry to every alert immediately, they are likely to make some phone calls to see if it could be a mistake, put out a VHF call to you (or others in the area)...
They also of course respond to every DSC distress message they get too!
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Originally Posted by Rob57
.with non fixed unit do I need a ships licence? Is a 2.75m open boat too small for one anyway (can’t find any details on Ofcom website)?
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If you mean is a 2.75m boat too small for a fixed VHF then technically no - you could fit one if you have a battery and either use a stubby aerial or mount a long aerial on a pole*. The former will have no better range than a handheld though. Personally though, in your shoes I would be following the others advice and going PLB. If they haven't convinced you enough then keep in mind that the battery life of DSC radios is much worse than their simpler cousins.
(*I get a massive improvement in range/quality from a roughly 1m aerial on a pole about 2m above the deck compared to a h/held being used sitting on the "tubes".)