22/08/2024
JRC GPS week number rollover ＊1 for equipment is to occur on some of our GPS' on 8th September 2024 or 3rd August 2025.
The subject models are designed to turn the clock back 19.6 years (23th January 2005), and will continue to work incorrectly under normal use, however there is no influence on positioning operation.
However, as the results, the following abnormalities occur in some equipment.
For details, please see the 2. notice and countermeasures below.
*1 GPS week number rollover :
The week number counter in GPS resets once every 1023 weeks, which is approximately 19.6 years. The week number counters for the GPS in the objective equipment below started their week count from 23rd January 2005. It is on 8th September 2024 at 00:00 AM (UTC) that the week number counters rollover will occur.
September 8, 2024 GPS ROLLOVER impacts the following JRC devices*:
August 3, 2025 IS JUST AROUND THE CORNER – GPS Rollover affecting JRC devices*:
*Depending on device, either ALL or specific S/N or CORE may apply
| Equipment | Models | Subject Serial No. | Notice | Countermeasures | ||
| Inmarsat Fleet Broadband FB250 | JUE-500 | All | The registration process to the Inmarsat network fails and communication becomes impossible. The date of the internal clock and log function of the device returns to the starting date. | Upgrade the software＊2 Confirmation method of JUE-500software version | ||
| GPS Navigator | JLR-7500 | All | Note that time and date will go back to the starting date (January 23, 2005) when a master-reset of equipment or a battery replacement is carried out after rollover day. | When the time and date go back to the staring date, the equipment will return to normal operation by the following settings. Setting method of JLR-7500 Setting method of JLR-7600 Setting method of JLR-4331W Setting method of JLR-4340 Setting method of JLR-20/30 | ||
| JLR-7600 | All | |||||
| GPS Receiver | JLR-4331W | After KE51719 | ||||
| JLR-4340 | All | |||||
| GPS Compass | JLR-20 | All | ||||
| JLR-30 | All |
| Equipment | Models | Subject Serial No. | Notice | Countermeasures | ||
| AIS | JHS-182 | JHS-182: after BB51401 NTE-182: after BB71401 | Note that time and date will go back to the starting date (December 18 ,2005) when a master-reset or restarting of equipment is carried out after rollover day. | Upgrade the software＊2 or JHS-183 replacement | ||
| JHS-183 | NTE-183: up to BE04000 NCM-983: up to BB04206 | Upgrade the software＊2 | ||||
| GPS Navigator | JLR-7800 | All | Note that time and date will go back to the starting date (December 18 ,2005) when a master-reset of equipment or a battery replacement is carried out after rollover day. | When the time and date go back to the staring date, the equipment will return to normal operation by the following settings. Setting method of JLR-7800 Setting method of JLR-7900 Setting method of JLR-4341 Setting method of JLR-21/31 | ||
| JLR-7900 | All | |||||
| GPS Receiver | JLR-4341 | All | ||||
| GPS Compass | JLR-21 | All | ||||
| JLR-31 | All |
*2 : For more information, and countermeasures, please contact our service agents or sales representatives.
For the software update, the corresponding cost will be charged.ontent
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