Brunton Compass Instructions History of Diving Museum

Brunton Compass Instructions

Brunton Compass InstructionsA Brunton compass is a navigation instrument that combines a compass with a clinometer, allowing users to measure magnetic azimuths, determine slopes, and perform various navigational tasks. Here are detailed instructions on how to use a Brunton compass:

Familiarize Yourself: 
Ensure you understand the basic components of the Brunton compass: the compass housing, the sighting arm, the bubble level, and the clinometer.

Set the Declination: 

  • Determine the magnetic declination for your location. This information can be found on topographic maps or obtained online. (Magnetic declination, sometimes called magnetic variation, is the angle between magnetic north and true north. Declination is positive when this angle is east of true north and negative when it is west.)
  • Adjust the declination screw on the compass housing to set the correct declination for your area. This ensures accurate navigation by compensating for the difference between magnetic and true north.

Open the Compass:

  • Hold the compass with the hinge up and open the compass lid.
  • Align the sighting arm with the compass housing, making sure they are parallel.

How to Use a Brunton CompassTake a Bearing:

  • Sight the target along the sighting arm.
  • Rotate the compass housing until the north arrow aligns with the magnetic needle.
  • Read the azimuth (the horizontal angle or direction of a compass bearing) from the compass housing.

Measure Slope with Clinometer:

  • Close the compass lid and flip the Brunton compass to expose the clinometer (a tool that is used to measure the angle of elevation, or angle from the ground, in a right - angled triangle).
  • Hold the compass with the clinometer side up.
  • Sight the target along the clinometer's slot.
  • Read the slope angle (a number that describes both the direction and the steepness of the line), from the scale on the clinometer.

Use the Bubble Level:

  • When taking a bearing or measuring slope, ensure that the bubble in the bubble level is centered. This ensures that the compass is held level for accurate readings.

Close the Compass:

  • Close the compass when not in use to protect the delicate components.

Navigate with the Brunton:

  • To navigate, follow your chosen azimuth by sighting along the compass and aligning the north arrow with the magnetic needle.

Here Are Some Tips:

  • Practice using the compass in various conditions to become proficient.
  • Check the accuracy of the compass periodically, and if needed, calibrate it.
  • Be aware of local magnetic anomalies that may affect the accuracy of your readings.

Remember that these instructions are a general guide, as features and procedures may vary.

Brunton Compass

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