macphail Posted January 28, 2011 Report Share Posted January 28, 2011 Hi -new to this so please forgive. There have been a lot of comments on the various communication technologies but here is my tuppence worth. 1. sat comm: is point to point not broadcast (no-one else can hear the tx)2.mobile phones are point to point technology, oh and no-one else can hear the tx (although the MRCC can re-route).3. Channel 0 pagers are the newest CG pager system replacing Vodafone both have their pluses but both have their problems due to the Shetland topography.4. The microwave link south is susceptible to atmospheric and environmental factors, electrical supply and single point of failure problems -in other words not resilient and cannot be guaranteed and follows the self same route south. Also a power cut in Scalloway will cut the signal to the Scalloway transmitter taking out Vodafone and O2. Enough for now I think PS Moddie if this ends up in the wrong place, please put it into the Shetland Coastguard thread. Quote Link to comment Share on other sites More sharing options...
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