Master Launchcontroller

The Master Launchcontroller of Krull was a Wizard in charge of the launch of the space craft Potent Voyager. He briefed the Arch-Astronomer on the status of the mission. He also reported on the escape of Rincewind and Twoflower from the custody of Garhartra, and the emergence of a small, fierce monster from the sea which began attacking everything in sight, including ships in the harbor.

He was described as a practical magician, not a diplomat. Is he perhaps not a true Wizard, but a lesser Magician? Or is this just another case where The Colour of Magic mixes the words "magician" and "wizard"? (Pratchett does so later, when the Arch-Astronomer orders all magicians/wizards in Krull to attack the Luggage).