s61n
Bit of a thread drift but it is still valid.
Ok, I get where you're going with this and it may work for regular slinging using a crewman for directions but I seriously doubt anyone would bother if they were doing true longlining, I wont. I am not shooting down the idea, there are certain applications where it will work but not in the production longlining environment where time means money.
If you mount the screen in the door close to your instruments (For those who have instruments mounted in the door or floor) you may struggle with reflection. Changing focus between a small screen and whatever you are slinging 70 to 300 feet below you is going to be challenging and will necessitate shorter lines being used just to keep the load in the screen.
A controllable zoom camera/view will require a bit more dexterity and excess brainpower to interpret but could help. An oblique view from the tail stinger will help to judge height when doing precision work, if there are no shadows to assist. As another point to ponder, when will technology enable fore and aft mounted cameras to show a 3D view, or a reasonable impression of depth perception to be shown on a screen, superimposed images like a stereographic projection?
For other flying, I do like the idea of a forward or aft looking camera to ensure clearance from obstacles in a LZ. Takes some of the guesswork out of the equation.