This is the point i'm making, weather its a coaster or blood great grey jobby (not that theres many of them left) if yachts listened on channel 12 they would have all the info about shipping movements they need.
If they were on dual watch, they would be on channel 12 anyway. And why is there move room for evasive action by the larger ship around the Nab ?, how could anyone know the draft of a ship unless they had called the ship, or listened on ch 12 to the conversation between the pilot or master of the ship and VTS ?.