Great Circles And Rhumb Lines Flashcards
What is a great circle?
The most direct route between two routes
What does antipodal mean?
Opposite sides of the earth.
What are rhumb lines?
Route between two places that takes place in one direction.
What is the northern vertex of latitude of a great circle the same as within a great circle route?
The angle at which you cross the equator.
DI/ID
How do you calculate the distance between A and B if they’re on the same meridian?
CHLAT x 60
How do you calculate the distance between A and B if they’re both on the equator?
Chlong x 60
At 60’N, what is the circumference of the earth?
10,800nm
What is the cosin of 60 degrees?
0.5
What is departure known as in terms of navigation?
E to W along a parallel of latitude.
What is the equation for departure?
Chlong x 60 x cos (latitude)
What does it mean by rhumb line distance?
Departure.
At the northern or southern vertex, what is your heading?
090 or 270 degrees
For two positions lying on the same latitude, blank follows that parallel of latitude, and is therefore either 090°(T) or 270°(T).
The rhumb lines
