In an earlier post I mentioned that a Raymarine tech person said that the RayStar 125 GPS unit on my boat would see a GPS week rollover discontinuity this year. The issue arises because of using a 10-bit value to represent the week number, hence every 1024 weeks (about 20 years) that counter rolls over. (I have read that newer GPS units may be using a 13-bit value thus yielding a rollover period of over 150 years.)
Today, I found a table on the old Raymarine forum that was produced by Raymarine showing the year at which various products containing a GPS receiver had or will have problems and what corrective action to take. That table can be found at the URL below. Note that this issue doesn't affect the accuracy of the GPS fix. Rather, it only affects the unit's ability to properly calculate the current date/time using the data from the satellites.
Today, I found a table on the old Raymarine forum that was produced by Raymarine showing the year at which various products containing a GPS receiver had or will have problems and what corrective action to take. That table can be found at the URL below. Note that this issue doesn't affect the accuracy of the GPS fix. Rather, it only affects the unit's ability to properly calculate the current date/time using the data from the satellites.
