From Rolls Royce, and being used as a steerable bow-thruster and stern-thruster, for maneuvering a tugboat...
https://www.youtube.com/watch?v=AZeWPlVoLko
[youtube]AZeWPlVoLko[/youtube]
https://www.youtube.com/watch?v=AZeWPlVoLko
[youtube]AZeWPlVoLko[/youtube]