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what shape is the earth and what can it be considered if viewed in small parts?
the earth is a sphere, but small parts of it can be considered to be flat
when does the curvature of the earth become important?
when travelling large distances
what do we use to state directions?
bearings
what is a bearing?
a bearing is the horizontal direction of an object from an observer expressed as the clockwise angle from north to the direction of the object
what are bearings measured in and what three figures are they given as?
bearings are measured in degrees as figures from 000 degrees to 360 degrees
what is a back bearing or reverse bearing?
is the bearing of the opposite direction that differs from the bearing by 180 degrees
if a bearing is less than 180 degrees, how do you find the back bearing?
add 180 degrees to the bearing
if a bearing is more than 180 degrees, how do you find the back bearing?
subtract 180 degrees from the bearing
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