MD69AZI AZIMUTH SIGHT
MD69AZI Fitted to MD69BR Bearing RepeaterMD69AZI Azimuth SightMD69AZI Azimuth Sight on MD69BR Bearing Repeater

MD69AZI AZIMUTH SIGHT

MODEL NUMBER: MD69AZI

The MD69AZI from MARINE DATA is a precision Azimuth reading device designed for taking accurate bearings of the sun and other celestial bodies and of terrestrial landmarks.

SKU: F069051 Category: Tag:

Product Description

OVERVIEW

The MD69AZI from MARINE DATA is a precision Azimuth Sight reading device designed for taking accurate bearings of the sun and other celestial bodies and of terrestrial landmarks.

Based on the William Thomson (Lord Kelvin) Pattern, the MD69AZI is designed for use with the MD69BR series of Bearing Repeater (bezel Ø 9.7 inch; 246.4 mm) and finished in satin jet black paint to complement other marine equipment. The MD69AZI is supplied complete in a varnished marine plywood instrument case for safe and convenient storage.

The MD69AZI Azimuth Sight from MARINE DATA: easy to use and simple to maintain.

SPECIAL FEATURES

  • Adjustable UV and neutral density sun filters
  • Robust marinised construction

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Product Specifications

PHYSICAL

  • Type: Thomson pattern azimuth reading device, Group II
  • Weight: 1.9kg
  • Dimensions: 257mm diameter; 134mm height (filters vertical)
  • Mounting: Designed for use with the MD69BR series of Bearing Repeaters; bezel Ø9.7inch (Ø246.4mm)
  • Reflector: Rotating 60° triangular prism, 30mm length
  • Sun Filters: 1x UV filter (SchottTM RG780) 1x neutral density filter (SchottTM NG1)
  • Collimating Lens: 100mm Focal Length; 33mm Diameter
  • Spirit level: Sensitive to tilt of <1°
  • Construction: Marine Grade Naval Brass
  • Finish: RAL9005 satin black paint

OPERATIONAL

  • Method I: To take bearings of landmarks or low luminosity objects near to or on the horizon (set the arrow on prism adjustment thumbwheels = DOWN). A distant object is sighted directly by the eye and the compass card simultaneously viewed indirectly through the prism. Max. altitude approx. 34° above horizon.
  • Method II: To take bearings of the sun or other celestial objects high in the sky (set the arrow on prism adjustment thumbwheels = UP). The compass card is viewed directly through the collimating lens and a distant object simultaneously viewed indirectly through the prism. Max. altitude approx. 60° above horizon.

ADDITIONAL INFORMATION

  • The MD69AZI meets ISO25862:2009 for the testing and certification of Group II azimuth reading devices
  • Always use the sun filters when taking azimuth bearings of the sun; never attempt to take bearings of the sun with unprotected eyes
  • This pattern of azimuth sight was originally developed by the British physicist Sir William Thomson (Lord Kelvin) (1824-1907) and introduced in the early 1880s

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