As I have had explained to me - thanks John - the rear facing pilot doesn't have mechanical controls but has a system giving 10% AFCS authority.
Anyone familiar with the Sea King AHT (auxiliary hover trim) will understand the idea.
As with the AHT, there is a verbal handover of control with the forward pilot following through on the mechanical controls while the load is positioned/lifted and then taking control for the transition.
Late to the party here, but some old images of the backseat of the S-64.
Yes, the same system that gives the crewman in the back of a Sea King 10% authority
