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The Mark 15 has a 7″ (18 cm) frame radius graduated from 120 degrees to –5 degrees and comes with a traditional half-silvered mirror
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Vantage Pro2 Plus features an industry-leading transmission range of 1
Includes the new 5
Webbing is 12″ (31 cm) long
Mark 25 Sextant Navigation Tool - SKU 25 Marine Category_Radar Reflectors The Mark 15 has aA sextant is an excellent tool to have on board any size craft as a backup in case there is a failure of the navigational systems. Used to measure the angular distance between two visible objects, the most common sextant navigation points are an astronomical object and the horizon. Sextants have many uses, ranging from measuring the distance of a landmark to determining Greenwich Mean Time. The top of the line Davis plastic sextant, the Mark 25