The race map seem only keep the race start and current boat position. It would be better if the whole historical locations of the boat are kept and drawn on the map. Otherwise, nice!
The boat's historical track is shown after some time (within an hour of starting), but it will only draw the lines between the positions at the top of each hour (so intra-hour positions are lost, but this isn't that interesting anyway for more long-distance races). But you're right, it's a bug that it doesn't show you any track within the first hour. :)
Also, when you have more than one boat in a race, you'll see your historical track and all the other boats' tracks shown on the same map. This makes it interesting for long-distance races with multiple boats.
The boat's historical track is shown after some time (within an hour of starting), but it will only draw the lines between the positions at the top of each hour (so intra-hour positions are lost, but this isn't that interesting anyway for more long-distance races). But you're right, it's a bug that it doesn't show you any track within the first hour. :)
Also, when you have more than one boat in a race, you'll see your historical track and all the other boats' tracks shown on the same map. This makes it interesting for long-distance races with multiple boats.