Originally Posted by Minnesail
Yes, that is exactly what I was taught. The teacher was Navy and he said any communication with Navy or Coast Guard should be in true, but for his own navigation he used magnetic because it was his opinion that it was simpler and had fewer opportunities for error.
I can see your instructors point. Perhaps the simplicity of using magnetic while coastal cruising or island hopping where the distance from help is not so great and course changes are likely more numerous would be advantageous while using true on long crossings for communicating position in the same format as ships encountered or emergency situations would be a reasonable compromise for the sake of speed and convenience.