They are meant maily as reference and are in low quality. You can make out some details but some fine details might appear too blurred.
For an example you can check out our low resolution map collection at DriveTruRPG:
The ships will be about 15-40 meters long. Each will fit into a letter sized sheet - 5 mm on the sheet represent 5 feet.
We will try to make as many different types as possible. Several smaller ships might count as one spaceship map. Two floors of a big ship counts as two maps. We will make one or two small space stations.
Don't see the answer to your question? Ask the project creator directly.