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Silva 515 User Manual

Silva 515
16 pages
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A PRECISION INSTRUMENT
DESIGNED FOR
PROFESSIONAL USE.
INSTRUCTION MANUAL
RANGER COMPASS
model: 515
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Silva 515 Specifications

General IconGeneral
TypeBaseplate compass
Global balanceYes
ClinometerNo
Liquid filled capsuleYes
Luminous markingsYes
MagnificationNo
Resolution degree
Water resistanceWaterproof

Summary

Silva Ranger Compass Components

General Compass Usage and Handling

Determining Field Directions

Basic Conditions for Field Direction

Outlines the two essential conditions for using the compass to find directions in the field.

Map Bearings and Magnetic Declination

Obtaining Bearings from a Map

Explains how to determine direction readings from a map using the compass.

Understanding Magnetic Declination

Defines magnetic declination and its relationship to True North and compass readings.

Allowing for Magnetic Declination

Temporary Declination Adjustment

Describes a method to temporarily adjust the compass for declination each time it is used.

Permanent Declination Adjustment

Permanent Declination Adjustment

Explains how to use the compass's built-in mechanism for a permanent declination setting.

Taking a Bearing

Adjusting Field Bearings for Declination

Plotting Locations on a Map

Triangulation Method for Plotting

Details the triangulation method using cross-bearings to plot locations on a map.

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