The Gea Org.

Navigation with Distance, Time, and Pace (V)

By Robert Finlay of

Edited by Federico Ferrero

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ESTIMATING TIME to GET THERE: Time equals distance divided by your pace. Usually this is the estimated distance divided by your anticipated pace. Ask yourself two questions. More or less how for is it? And how fast do I plan on going? Some examples:

Ref. map B4, Grapevine and Grassy Springs

1. Mountain Biking on a Road: At top is a map with 1000 m grid squares. How long is it going to take to bike over to WP 1?

Distance: Count the number of grid squares the road travels through. I count 3. Multiply that by a "fudge" factor of 1.5, you get 4.5 km. If you measure it carefully you still get 4.5 km. After you ride it; your odometer will show 4.5 km. 1.5 seems to be a good "fudge" factor for unimproved roads and trails.

Pace: You figure you'll ride at 10 km/hr (6.25 mph).

Time: 4.5 km divided by 10 km/hr equals a little under one-half hour. ( 0.45 hr is 4 and tenths of an hour or 27 min.) A little under 30 min is a good enough answer.

Additional Map Analysis: For the 1st two-thirds of your ride you are going generally northwest. The terrain is draining generally to the northeast. This means you'll be crossing a lot of gullies; i.e. a lot of up and down.

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