I remember, in the 60's Transport Command, knowing all about consul but only listening to it out of interest.
We did get friendly in Bermuda with a small yacht crew-a chap and his girl friend-who were about to make their first transatlantic crossing. Not only did we let them use our hotel rooms for a shower but the Nav set up a ground school for them on consul.
They departed with one of Her Majesty's consul charts suitably marked with Ocean Stations and frequencies. I hope that they made it!