On 10 Jan 2015, at 07:26, shadow@shadowgard.com wrote:
>Things that will prevent the ship from lifting fall into several
> categories:
>
> 1. legal...
> 2. "practical"...
> 3. "physical"...

4. Psychological
Don't do anything to the ship but allow the crew to become aware that the ship has been sabotaged - just trying to figure out how the opposition has subverted their diagnostics to hide the sabotage should take some time. If there is minor damage that they can find after a short time, they might be encouraged to spend longer looking for the serious damage.