Our AIS device reports our position as we travel. If there is an receiver connected to the Internet, then our position is logged into the Marine Traffic database. These internet-connected receivers are run by volunteers and especially in France, few and far between. To get over this, we use an app provided by Marine Traffic which takes our GPS position and sends it to the database over the internet. We generally run this app at the end of each cruise to mark our end location.
We have had a bit of trouble with this service, a ‘phantom’ boat called Caveman has been appearing instead of us. It’s been fixed twice and we hope that is the end of it but if Caveman appears instead of Catharina Elisabeth, the map is not reliable.