Marina Board Exam: In the time diagram , the angle at the pole between the hour circle of the First point of Aries to the meridian of the observer at Greenwich is called:

Marina Board Exam

In the time diagram , the angle at the pole between the hour circle of the First point of Aries to the meridian of the observer at Greenwich is called: 
A. SHA of Aries 
B. Right Ascension 
C. GHA of Aries 
D. Sidereal Hour Angle



Answer:  C.  GHA of Aries