I love Red Eagle. It is so easy to turn it around.
The lower two wheels control the power of each of the thrusters.
The upper two wheels control which way the thrust is going. You'll see a dial for each of these "direction" wheels, that has a white line indicating the way that the thruster will move the vessel.
So, to get going, apply power to both thrusters by turning the lower two wheels. Set them the same, or else you'll go round in a circle.
To reverse, just spin the two direction wheels so that the white line points downwards. To go sideways, set them so that the white lines both point sideways.
To turn the vessel around, set one line to point to the left and the other to point to the right.
You'll soon get the hang of it.
PS if you want to get Red Eagle into Portsmouth Harbour, there is an updated version on Creators forum.
Also, I created a set of missions that use Red Eagle in the Solent. You'll find those to be a great deal of fun once you learn to steer Red Eagle.