Garmin GPS receivers store two different types of track logs. The first, is an "active" track log. This is the current set of bread crumbs (points) that your GPS unit is laying down (recording) while you are moving. The second, is a "saved" track log. This is what an active track log becomes once you give it a name and save it for future use. There are distinct differences between the two.
An active track log can be made up of as many as several thousand individual points, the exact number dependent upon which receiver you own. A saved track log is an active track log that has been reduced to a maximum of just hundreds of points. This means that an active log will have a much higher resolution of the same route compared to a saved log, and show much greater detail of your path.
Additionally, and just as importantly, an active track log stores information for each point that a saved log does not-- chiefly, the date and time of each point. From this additional information can be calculated much information, including leg and average speeds, as well as leg and total elapsed times.
So you can see that it is mandatory that you submit your active track log to us once completing the rally. Besides clearing your log prior to the rally, you must also remember to not delete your active log, even if you save it first. You must also either: 1. Setup your track log so that it does not "autoflow" or overwrite the current log when it becomes full, or 2. Manually turn off the track log at the completion of the rally, or soon afterwards to prevent your current log from being overwritten on the ride or drive home, if you use your GPS then as well.
We will post suggested track log settings for your GPS receiver based on the number of tracklog points your unit is capable of holding, and will do so for each rally to aid you in getting a good log without running out of memory while also maintaining the highest possible resolution. If this all sounds like gobblety-gook... take heart, for we will provide simple instructions that will make it easy. Once you've setup logging once, it will become a piece of cake after that.