Author: Russ
AIS Class A – What is SOTDMA?
Published Date: 3 March, 2007 Leave a Comment on AIS Class A – What is SOTDMA?
The operation of AIS depends on the Self Organizing Time Division Multiple Access (SOTDMA) data communication technology, which was developed in the 1980’s. It allows…
VHF – Low or High Power on Transmit?
Published Date: 27 February, 2007 Leave a Comment on VHF – Low or High Power on Transmit?
VHF radios that conform to the ETU spec have two power settings 1 or 25 watts for fixed sets and 1 or 5/6 watts for…
Hydroptere – 47.2 knots
Published Date: 27 February, 2007 Leave a Comment on Hydroptere – 47.2 knots
The fastest sail boat in the world is the Hydroptere. This is an incredible trimaran and if you watch the video on the site below…
Collision avoidance – ARPA , CPA or …what?
Published Date: 24 February, 2007 2 Comments on Collision avoidance – ARPA , CPA or …what?
If you have a Radar it will probably be set to use ARPA to assist you in deciding whether you are on a collision course…
What is the Automatic Identification System (AIS)
Published Date: 24 February, 2007 Leave a Comment on What is the Automatic Identification System (AIS)
Courtesy of the excellent US Coasd Guard Navigation Site… http://www.navcen.uscg.gov/enav/ais/default.htm Picture a shipboard radar display, with overlaid electronic chart data, that includes a mark for…