I like how it shows you where your vessel has been in relation to other vessels within its class or type (so far). It's very helpful for determining if another boat could be hitting my keel while docking at port. It can also help with maneuvering when navigating narrow channels. The only thing about this software so far is there are some issues loading certain files into it - sometimes they load but not always. If you're looking to keep track of what boats have passed through ports before arriving at yours, then using an app such as exact EarthShip View will do just fine! When we dock our own ships near others' docks, especially large ones, we use Exact Earthship view to determine who should get first berth/wharf space since those areas tend to fill up quickly during busy times.