The switch next to the PVI-800 mode selector rotary switch is mislabelled. It has changed with the new cockpit update. The top position should be 'Shkval,' and the bottom position 'INU'.
Currently the top position says 'INU,' incorrectly, and the bottom position says 'Update,' which doesn't really mean anything.
I have verified this because by trying to use the Shkval to designate a target in the PVI-800, I have to set it to the 'INU' (up) position for it to work properly. If I set it to the 'Update' position it saves my own co-ordinates as the target point.
The switch behaviour has not changed, the switch labels are just wrong.