{"id":14752,"date":"2024-03-25T15:28:46","date_gmt":"2024-03-25T07:28:46","guid":{"rendered":"http:\/\/www.erun-tech.com\/?post_type=product&p=14752"},"modified":"2024-03-27T20:55:47","modified_gmt":"2024-03-27T12:55:47","slug":"liufenyi","status":"publish","type":"product","link":"http:\/\/www.erun-tech.com\/en\/product\/liufenyi","title":{"rendered":"Sextant"},"content":{"rendered":"

<\/h2>\n

Sextant<\/h2>\n

 <\/p>\n

Legal Basis: Regulations on the Administration of Seafarer Training of the People's Republic of China (Order No. 5 of the Ministry of Transport, 2019)<\/strong><\/div>\n
Product Category: Captain, Chief Officer, Third Officer Training
\n<\/strong><\/div>\n
Product Name: Sextant<\/strong><\/div>\n
Functional Requirements: Meet the requirements of the training syllabus.<\/strong><\/div>\n
Specified quantity: 20 units<\/strong><\/div>\n
<\/div>\n
\n

Basic Parameters
\n(1) Measurement Range: -5 to +130\u00b0
\n(2) Measurement accuracy: 40 arcseconds
\n(3) Discrimination rate: 8.75 arcseconds
\n(4) Telescope:
\nMagnification: 3.5X
\nField of view: 5\u00b0
\nObjective lens diameter: 40 mm
\nExit pupil diameter: 11 mm
\n(5) Illumination voltage: 3 volts
\n(6) Operating temperature range: -30 to 50\u00b0C
\nThe nautical sextant is an optical instrument used to measure the angle between celestial bodies and the horizon\u2014specifically, the altitude of celestial objects, the horizontal angle between two landmarks, and the vertical angle of a single landmark.
\nThe sextant is a precision angular measurement instrument composed of three major components: the mount, the optical system, and the angular reading device. The optical system includes the telescope, movable prism, fixed prism, and filters; the angular reading device comprises the graduated arc, pointer rod, drum wheel, and vernier scale. All these components are mounted on the frame, with the optical system and angular reading device integrated into a single unit via the pointer rod. The sextant measures angles based on geometric principles such as: \u201cthe exterior angle of a triangle equals the sum of its two non-adjacent interior angles,\u201d \u201ccorresponding angles in parallel lines are equal,\u201d and \u201ca central angle can be measured by the arc distance it subtends.\u201d
\nPurpose
\n1. Determine the ship's position by measuring the altitude of celestial bodies.
\n2. Measure two horizontal angles between three known positions on the ground, then determine the ship's position on the chart using a three-rod quadrant.
\n3. Determine distance by measuring the vertical angle to a target of known height.
\nInstrument accessories
\n1. Sextant 1 unit
\n2. Monocular 1 unit
\n3. One spare light bulb
\n4. Calibration wrench 1 piece
\n5. Oil cruet 1
\n6. Screwdriver 1
\n7. Brush 1 piece
\n8. Cleaning cloth 1 piece
\n9. Instruction Manual 1 copy
\n10. Certificate of Conformity (1 copy)<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"

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