Hi Winter I take it that from your post there is a possibility of collisions between cranes. I admit that I am not up on that. However I wonder if you could look at something along the lines of parking sensors that will alert the oprators if the cranes get within a certain distance of each other. Regards Mike

Winter I have had the pleasure of using various systems. I might be an old cynic but sorry you cannot beat the robust RA where crash radios are used and it is controlled by humans. Problems encountered with Smie systems. 1. Not synchronised daily. 2. Being cut out by Radio Masts, Taxi Firms Radios, Concrete Pumps and many other electronic wizardry. 3. Biggest problem of all Crane Operator not being trained properly in there use. There are many varied types as you know and sites must ensure that supplied operators are aware of how to use them. I was very fortunate in that we only had one TC Operator Supplier who had trainers that ensured operators were trained before using them.