Transit Survey

Bearing angles - transit surveying ?

The true bearing of line AB is N30.15E, and the true bearing of line AC is S10.55E. The angle BAC measured clockwise is:

A. 19.20
B. 199.20
C.41.10
D.138.50

i thought this was the calculation:

180 - 30.15 - 10.55 = 139.3 ?! but thats not correct on the multiple choice... what am i doing wrong?

Perhaps what you put as decimal places are actually minutes. (1 degree = 60 minutes)

180º00' - 30º15' - 10º55'

To make it easier to subtract we can rewrite 180º as 178º120'

So
180º00' - 30º15' - 10º55'
= 178º120' - 30º15' - 10º55'

So, now you work out the degrees
178º - 30º - 10º
= 138º

Then the minutes
120' - 15' - 55'
= 50'

And then we arrive at 138º50', in which case the answer would be D.

Find Transit Survey On eBay Below:



Recently Purchased Transit Survey:


heavyduty wood tripod surveying transit level survey equipment, topcon tripod for survey transit level theodilite surveyor surveying tool, transit tripods and grade poles for surveying, sokkia tripod wood fiberglass survey gps laser mount field transit used, northwest aluminum quick clamp survey contractor tripod for transit laser nat83, sokkisha sokkia lietz topcon wooden tripod transit survey surveyor from wood, cst berger builders aluminum construction survey tripod transit



Comments are closed.