In a notice of 12 March IALA informed its members that the GPS Week Number will be rolling over on 6 April. It is understood that this could lead to errors in both GPS position and time for some GPS receivers, or systems such as AIS, using GPS. This should not affect newer equipment, or equipment that has had regular firmware updates from the manufacturer. While the date of the rollover is identified as 6 April 2019, some equipment may rollover on a different date depending on the implementation in the manufacturer’s firmware. Most manufacturers are aware of the rollover and have provided information on their websites.