Author: Russ

Dual Band AIS – Raymarine AIS250

At last Raymarine have produced an AIS receiver – not only that but it combines three other cost saving attributes : 1. It has a…

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Dual Band AIS – Secas

Secas have come out with a dual band AIS receiver – with status lights ! – a big gripe with the NASA product that I…

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Connecting Phillips Navigator MK8 to a MT500 DSC/VHF

After a recent correspondence via this blog, I thought it would be useful to publish the interface information for this connection. The Philips MK8 has…

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AIS CSDTMA – what is it ?

AIS Class B, as specified within IEC-62287-1, in fact operates slightly differently in the way transmissions are controlled it does not use SOTMA it uses…

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AIS Class B – Whats the difference

AIS Class B was specified as a much less expensive, limited range and limited feature sub-set of the original Class A. Class B has a…

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