Abstract: Systems and methods for remotely monitoring contents of a vessel in real-time. Along a shipping route, status of the contents (e.g., volume) is periodically and automatically transmitted to a remote user. A method includes determining volume of contents in a vessel at a first location along a route, determining volume of the contents in the vessel at a second location along the route, and comparing the two determined volumes. If the change in volume satisfies a preset threshold, then the method includes triggering a notification to a remote user.