November 30, 2007

• Celestial Navigation

  You know you have too much time on your hands when you start thinking of learning to use a sextant.

  
  

  	$43.99 USD DAVIS INSTRUMENTS — Mark III Sextant While this sextant has been used to navigate both the Atlantic and Pacific oceans, its primary application is as a great tool for students to use before buying a more expensive sextant. It has a 7″ arc and four sun shades. Plastic construction is corrosion-proof and instantly adjustable. Case not included.     * Frame Material: Plastic construction     * Sighting System: Half-silvered mirror     * Scope Magnification: None     * Filter Shields: Four sun shields     * Arc Range: 2′ of arc     * Drum Calibration: 120° to -5° of arc     * Lighting: None     * Weight: 6oz.     * Case: Not included     * Included Accessories: Instruction booklet     * Warranty: One Year from http://www.westmarine.com/webapp/wcs/stores/servlet/product/10001/-1/10001/1611
  	$144.99 USD DAVIS INSTRUMENTS — Mark 15 Sextant The same precision and quality as the Mark 25,(#137216) but with a conventional half-silvered horizon mirror sighting system instead of the beam converger, and no LED illuminator. Same rugged plastic construction; same instrument specifications.     * Frame Material: Rugged plastic construction     * Sighting System: Half-silvered horizontal mirror     * Scope Magnification: 3 x 27mm     * Filter Shields: Seven large sunshades     * Arc Range: .2′ of arc     * Drum Calibration: 120° to -5° of arc     * Lighting: None     * Weight: 14.5oz     * Case: Padded shock-resisting case     * Included Accessories: Well-written introduction and case     * Warranty: One Year from http://www.westmarine.com/webapp/wcs/stores/servlet/product/10001/-1/10001/1615
  	$229.99 USD DAVIS INSTRUMENTS — Mark 25 Sextant Accurate, lightweight and affordable An affordable sextant just half the weight of comparable instruments with metal frames, therefore easier to hold steady for accurate reading. Features a full field dielectric beam converger, combining horizon and celestial images in a single field for easy, reliable sights even in low light conditions. LED illumination floods the arc and drum with soft light for night use.     * Frame Material: Reinforced plastic     * Sighting System: Full-field beam converger     * Scope Magnification: 3 X 27mm     * Filter Shields: Seven large sunshades     * Arc Range: 2/10 minute of arc     * Drum Calibration: 120° to -5° of arc     * Lighting: LED Illumination     * Weight: 16.5oz Case     * Warranty: One Year from http://www.westmarine.com/webapp/wcs/stores/servlet/product/10001/-1/10001/6690
  	$1,099.00 USD WEEMS and PLATH — Tamaya Jupiter Sextant This full-sized sextant is an excellent value with many of the features found only on more expensive sextants. Includes large mirrors, a 57 x 42mm index and a 57mm diameter horizon. The inclined handle provides a natural and comfortable grip. Full illumination on the arc and drum. Optional scopes available in 4 x 40mm and 7 x 35mm (sold separately).     * Frame Material: Die cast aluminum, bronze arc     * Sighting System: Split horizon mirror     * Scope Magnification: Optional 4x40mm or 7×35 telescopes     * Filter Shields: 4 for index mirror, 3 for horizon mirror, one special shade glass and        one Polaroid glass for eyepiece of telescope     * Drum Calibration: -5° to 125°     * Lighting: Included for both arc and drum     * Weight: 3lbs. 12oz.     * Case Material: Molded plastic     * Included Accessories: Two AA batteries     * Warranty: Two Years from http://www.westmarine.com/webapp/wcs/stores/servlet/product/10001/-1/10001/126967

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