Infrastructure maintenance – April 22, 2026, 8:30 PM to 11:00 PM (EST)

System maintenance is planned on Wednesday, April 22, 2026 between 8:30 PM and 11:00 PM (EST). During this time, you may not have access to the following web maps: CHS Tides station map, CHS Surface Current map, CHS Chart Index, or CHS Nautical Charts – Find A Dealer. The IWLS REST-API, tides station table, and tide station pages will still be available. We apologize for the inconvenience.