As an illustration, not quite off-topic, for manual steering, the helmsman (http://www.youtube.com/watch?v=GUcQNxwcPtA) uses a wheel just the same way as for any other ship, with the same conventions, limited rudder angles and pivoting speeds. See also vampire's interesting post (http://80.95.161.114/shipsim/forum/index.php/topic,9156.0.html) about it, particularly the steering response delays.
The manual azimuthing remote controls, just in front of the supposed OOW in the first picture, are used for manoeuvring in any direction by rotation of the base. The main electric AC motor rotates a fixed pitch propeller in either direction, and is controlled by the lever.
Regards,
Luc