No link, my idea, remember you saw it here first.
On the APRA the mate on watch clicks on a target’s AIS display and from a menu selects either “red to red” or “green to green”. The AIS for that target then displays a “pending” symbol.
On the target ship an audible sounds, the target ship mate either selects “accept” or not.
If the target ship mate selects “accept” for say “red to red” own ship’s AIS changes from “pending” to “red to red”. . All the ships which are considered as risk of collision will show either “r to r” or “g to g” on each ship’s display.
No confusion, no bs on the VHF.