The Steering Flat - this is a machinery space, so it has to have noise and people to get an idea of the size.
I have found some info that leads me to believe that the 4 steering rams and cylinders were renewed in 2007. The two steering motors certainly look new. The ram cylinders hold 350 litres of oil each, so the total system capacity must be at least 1,400 litres.
Forgot to add - the high pitched whining noise is from the hydraulic pumps (the note changes when the rudder moves), while the low pitch roaring noise is from the propellers almost directly underneath the Steering Flat
A ram cylinder end cover is located below the electric motor shown below.
Cheers
SkillySnr