FURUNO Singapore News & Events
“GPS Rollover on 20th June 2021”
15 February 2021
We would like to inform valued customers and users of FURUNO GPS marine products of the GPS week number rollover occurring on 20th June 2021.
This happens because the GPS system calculates time by counting to 1023 weeks, after which, the count resets to zero. This is called the “GPS Week Number Rollover”. Subsequent erroneous data information on the GPS receiver clock may result in position instability, causing position errors, including failure of the GPS position acquisition etc.
List of Affected Equipment
Rollover Occurrence Date: 20th June 2021
| MODEL | SERIAL NUMBER | MODEL | SERIAL NUMBER |
| GP-3500F | Before 3484-0893 | GP-1650W | Before 3474-3690 and 3474-3706 to 3473-3733 |
| GP-80 | All serial number | GP-1650WD | Before 3476-6430 |
| GP-90 | Before 4400-6461 | GP-1650WF | Before 3475-0200 |
| GP-1640 | Before 3458-0700 | GP-1650WDF | Before 3477-0254 |
| GP-1640F | Before 3459-0950 | GP-1850W | Before 3478-1813 |
| GP-320B | Before 3473-6767 | GP-1850WF | Before 3480-2745 |
| GP-32 | Before 4439-1803 | GP-1850WD | Before 3479-0594 |
| GP-37 (GP-37-J) | Before 4441-3005 | GP-1850WDF | Before 3481-1225 |
Recommendation
- – To update the software for GP-3500 & GP-3500F to software V.06.03.
- – For other models, retrofit to latest model.
Note: Cold-starting will not restore date information.
Contact us for more information:
For Retrofits: salesgrp@furuno.sg
For Software Upgrade: sdc@furuno.sg
Click here for more details.
