I had a go at this:
Figures in
green are my measuring
Figures in
yellow are arbitrary coefficients from the instructions
Figures in
red are the answers
Measurements
- 8866.5km West of Meridian
- [COLOR="rgb(46, 139, 87)"]4764.2km[/COLOR] North of Equator
8866.5km /
120 = 73.8875
73 means I'm at
73W
0.8875 x
120 = 106.5km extra
106 means I've got 53' (106 /
2 =
53)
The 0.5km left over is
15" (
1km = 30", therefore 500m = 15")
W73 53' 15"
4764.2km /
120 = 39.702
39 means I'm at
39N
0.702 x
120 = 84.24km extra
84 means I've got 42' (84 /
2 =
42)
The 0.24 left over is
7"
N39 42' 7"
W73 53' 15" N39 42' 7"
Which is bang on - although my maths may not be.