Chilli - don't confuse the guy; the statement by RAC/OPS is perfectly accurate and correct. "Heading" is the compass heading selected by the pilot. If he is on his own navigation it will be the heading to get him to his destination, or next point at which his route changes. A "radar heading" is a heading which the pilot flies when instructed to do so by the air traffic controller. Don't worry about whether the term is strictly right at your stage; just believe what RAC/OPS and I have written!