Hi,
The rough workflow is something like:
- Create a new map project.
- Create a shoreline (optional) either by drawing in the project or importing from Google Earth (preferred).
- Add tracks to the project. The tracks are what will provide the depth data which is used to create the contours.
- Generate the project and switch to the contour view to see the contours.
If you have empty areas in your project, you can try increasing the max interpolation settings - this will interpolate larger gaps between track points, and fill in more gaps. If you still have gaps in your project, you probably need more data so you need to go out and map those areas.
Matt