A free app for Android, by Hydrographic Office of Marine Department of HKSARG.

eSeaGo is an offline, free mobile app for displaying information on Hong Kong waters, including sea charts. It can be used with the latest version of Android, iOS, and Windows devices.

As an offline app, eSeaGo is designed to save data and resources, which means that it does not need to connect to the Internet to work. It is a useful app for people who need to download the data to their mobile devices and have a low- or non-connection.

In addition, eSeaGo provides a simple and convenient solution for displaying the chart information for Hong Kong waters free of charge. It can display the information in portrait or landscape orientation, which is convenient for users to view and read the information.

It also provides a speed indicator and a true bearing indicator to help users better understand the route. The app is also able to provide a warning when users are approaching the harbor.