Hi,
There is a way to get single tracks displayed as multiple, unconnected sections. Humminbird does it when, for example, you start your unit a long distance away from the last place you stopped it. You'll notice that the current track does not join the end of the existing points.
We use the same technique in our product to show "contours", and provide track merging features of the sort you describe.
See
here for a step-by-step on how this works. With merging and (optionally) simplification of the track paths (to reduce the track point count), you can get a huge number of trails into each track slot. This also gives the advantage of having far fewer tracks to edit when changing the appearance in the HB unit.
So yes - I am plugging ReefMaster
- but, no need to buy - you should be able to get it done within the free trial period.
matt