Abstract: A network connected marine electronics system has one or more marine electronic devices, a mobile software application for installation on a mobile communications device, and a remote cloud-based information system. Marine data on the user's mobile communications device can be synchronized with marine data on the user's marine electronic devices and vice versa using a wireless marine network onboard a marine vessel and without the need to connect to a remote server. Marine data on the mobile communications device can include marine data transferred to the mobile communications device from marine navigation devices on another boat of the user and can include marine data of other users in a user community who uploaded that marine data to the cloud-based information system and selected to share it with other users. The network connected marine electronics system enables definition of different user roles and permissions for different users.