Морской Sextant измерительный угол навигации моряка корабль инструмент для навигации лодка аксессуары морской лодки морской яхты

Описание

Marine Sextant Measuring Angle Navigating Sailor Ship Instrument Navigation Tool

Feature:

1. The sextant is a precision angle measuring instrument, which consists of three parts: the frame body, the optical system and the angle reading device.
2. The optical system includes a telescope, a moving mirror, a fixed mirror and a filter; the angle reading device has an indexing arc, an index rod, a drum wheel and a vernier scale.
3. These components are mounted on the frame and the optical system and the angle reading device are integrated into one unit via the indicator rod.
4. The sextant is based on the principle that the geometrical "outer angle of the trigonometry is equal to the sum of the two adjacent inner corners", "the angle of the parallel line is equal", and the "central angle can be measured by the arc distance of the circle".
5. Professional manufacturing, stable performace, high reliability.

Specification: