Please, no wretched electronic systems. Use common sense and mirrors. A one convex mirror so you can see the whole plane for starting, push-backs, general handling and so forth and a flat mirror so you can see the nosewheel and stop line for docking. No electrics are need, no calibration program etc. and you will reduce the liability for foul-ups. You won't need any staff training (because it is effectively pilot operated) and we get the information we need to park. The only maintenance required is a an occasional wash by the window cleaner. I reckon mirrors would be cheaper to install and run than ANY electronic system and will also be considerably more reliable.
PM
Utter Rubbish!
Speaking as someone that sees the old Mirror type system and two other electronic type systems in use. The most errors are definitely with the Mirror System. The number of times aircraft stop short on these or pilots can't see their stop markings at night is a frequent occurrence.
Whereas the laser Safedock type is a lot more reliable.