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How To Set a Compass

map1 

In this example imagine that we are standing at the pumping station (bottom right circle) and want to go to the stream junction (top left). 


1st  Line up the base plate- Lay the base plate of the compass between the two points with the direction of travel arrow pointing where you want to go i.e. to the stream junction (See map2). 
note: Using the inner orienting lines of the base plate is more accurate than using the plastic edge of the base plate

map2 

2nd  Swivel the compass housing until North (red N) points to the top of the map, use the parallel orienting lines on the compass and the blue grid lines on the map to help you.(map3) 
note: you can find the top of the map (grid north) by looking at the writing, most of it runs from west to east with north being at the top.

map3 

3rd Read off the bearing, in this instance 312 degree's
4th Add 2 degree's to adjust for the difference between grid north (which the map points to), and magnetic north (which the compass needle point's to). 
note: this difference varies over time and also with country , this information is usually specified on the map. The variation given here is for Snowdonia in 2007
5th Follow the bearing- Swivel the whole compass until the red end of the needle line's up with the North (red N) on the compass housing. Then follow the direction of travel arrow.
 
  Further recommended reading:


Explorer Map 0017: Snowdon/Yr Wyddfa and Conwy Valley/Dyffryn Conwy (Explorer Maps)
 Amazon price: ?5.59

1:25000 map of Northern Snowdonia

Snowdon 1:25000 maps
Mountaincraft and Leadership 
Eric Langmuir

  Amazon price: ?14.99

Comprehensive but concise navigation section. Also chapters on ropework, mountain weather and winter skills. Required reading for mountain leaders but also any keen hillwalker.

Mountaincraft and Leadership
Navigation for Walkers 
Julian Tippett
 
Amazon price: ?8.99

An excellent book that takes the reader on a tour of basic navigation. By using clear language the author communicates in a concise way how to navigate. 

Navigation for walkers
  See the High Trek Library for more books

 

  Recommended Gear:
Silva Expedition 4 Compass 
2 degree graduations
An extended base plate with integral magnifier
Silicon map grippers
Stencil holes
Luminous markings
Scales in metric and imperial, together with 1:25000, 
1:50000, and 1:63360 (for old 1"map) romer scales.
Weight: 35g


Cotswold Price: ?26  

Field&Trek Price ?24.99

 

Navigation courses

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Copyright ? 2016 [High Trek Snowdonia]. All rights reserved.
Revised: February 13, 2009
High Trek Snowdonia
Tal y Waen
Deiniolen
Gwynedd
Wales

LL55 3NA
Tel:01286 871232
Email mail@hightrek.co.uk