The Offshore App is designed for Windows 10.Download for Windows 10
Windows 10 Offshore App 5.0.4 updated Oct 2019 - New Vector Topographical Maps.
Please ensure you have the latest Windows Updates installed.
To install the Offshore App your Windows Login needs to have Administrator rights.
The Windows 7/8 build of the Offshore App is no longer supported. You can still download the last build 4.0.5 (above) which was updated on April 2019. We recommend upgrading to Windows 10 to get the Windows 10 Offshore App and the latest features.