The significance of the satellite switch has also been talked about in another forum.
Below, I am posting a question I asked Raymarine and their answer. As you can see, this "conversation" occurred just last week.
Question:
I have a C80 MFD with GPS/2 KW radar/depthsounder system purchased last september.
Recently, I have begun to notice that when I am in the channel at the entrance to Clear Lake Tx (my home port), the display shows the boat at the very edge of the channel even when I am visually in the dead center of the channel. This is a new development. Nothing has changed about the channel itself.
I am not sure whether the display is showing me slightly "off" my position at all times. Is that even possible? If so, it makes me very nervous- I run some pretty tight channels using the display!
Response (Chuck Anderson) 09/05/2007 12:05 PM
Click on the following URL for information on this topic:
http://raymarine.custhelp.com/cgi-bin/r ... faqid=1321.
(Note: This is what you get from that URL - Alok
Question
What impact does the recent change to the United States' WAAS GPS correction system have on my Raymarine products?
Answer
The Federal Aviation Administration (FAA) recently decommissioned two WAAS GPS satellites (PRN 122 and PRN 134), and the activated two replacement satellites (PRN 135 and PRN 138). The WAAS firmware in certain Raymarine products does not recognize satellites 135 or 138.
All of the Raymarine products affected continue to receive the standard GPS signals and therefore are safe for navigation. As always, these products are an aid to navigation. It continues to be the user's responsibility to use caution, sound judgment, official government charts, notices to mariners and proper navigational skill when using this or any other electronic navigational product.
All software updates and instructions for these products will be posted to Customer Support section of
www.Raymarine.com.
If you have additional questions, please contact our product support department by clicking on the "Ask Raymarine" tab above, or by telephone on 603.881.5200. Press option 4 for Tech Support.
PRODUCTS AFFECTED:
C/E series utilizing an RS120 or RS125 GPS sensor connected on SeaTalk - require a software update that will be posted on our website during September, 2007.
2007 RC435 and RC435i- require a software update that will be posted on our website in early November 2007.
A60 and A65 utilizing RS12 GPS sensor- solution pending, check back for update on our website in early September 2007.