Nautical Equipment
Founded in 2011, Kunshan EMF Marine Co., Ltd. is a professional company specializing in Chinese shipbuilding and marine engineering equipment. The company’s main products include marine fire-fighting equipment, life-saving equipment, navigation equipment, ship outfitting parts, navigation and measurement equipment, marine tools, and more.
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![Nautical Sextant]()
Nautical SextantThe Sextant GLH130-20/40 are precision marine navigation instruments designed for accurate angle measurement between two visible objects. It features a durable construction, typically with a...read more -
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Binocular If Wp with Scale and CompassBostron 7x50 Waterproof and Fog Proof Binoculars with large eyepieces and wide field of view, ideally for marine environmentread more -
![Spare Wind Socks]()
Spare Wind SocksA wind sock is a simple but critical meteorological instrument. It is a conical tube open at both ends, mounted on a pole. The larger end is fixed to a circular frame, aligned with the wind...read more -
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Chart DividersThe BRASS Chart Divider is a timeless tool built to last. Featuring two sharp points connected by an adjustable brass hinge, it allows for exact setting and holding of a specific measurement. Its...read more -
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Digital Night Vision BinocularsThe NV-400B represents a significant leap forward in affordable, high-performance night vision technology. It utilizes a digital CMOS sensor and advanced image processing to deliver a clear,...read more -
![Barograph]()
Why choose us
Certification
The safety equipment we supply is approved by DNV, BV, RINA, LR, KR, ABS, CCS, and other classification societies, in accordance with international rules and resolutions for the marine and offshore industry.
Our Services
We also provide services such as product sourcing in China, procurement plan optimization, joint R&D, and supplying other specialized products based on customer requirements.
Production Market
After more than a decade of growth, we have established long-term, satisfying partnerships with over 200 professional customers from around the world, including Europe, the Middle East, Southeast Asia, South America, and North America.
Product Parameter (Specification)
|
Type |
GLH130-20 |
|
Measuring range |
-5~130 degree |
|
Accuracy |
(+,-) 10" |
|
Readability |
12" |
|
Working Temperature range |
-30°~+50℃ |
|
Telescope |
3.5x40 |
|
Lamp voltage |
3V |
|
Net weigh |
1.8kg |
|
Type |
GLH130-40 |
|
Measuring range |
-5~130 degree |
|
Accuracy |
(+,-)20" |
|
Readability |
12" |
|
Working Temperature range |
-30°~+50℃ |
|
Telescope |
3.5x40 |
|
Lamp voltage |
3V |
|
Net weigh |
1.2kg |
A sextant is a precision instrument made up of several key parts:
Frame – The backbone of the sextant, typically made of brass or aluminium.
Index Mirror – Fixed to the moving arm, this mirror reflects light from a celestial body.
Horizon Mirror – Half-mirrored, allowing both direct and reflected views of the horizon.
Index Arm – Moves the index mirror and is used to measure angles.
Arc and Vernier Scale – Marked in degrees and minutes for precise measurements.
Telescope – Helps in sighting celestial bodies more clearly.
Filters – Used to protect the eyes when viewing the sun.
Micrometre Drum – Allows fine adjustments to improve accuracy.
Practical Tips for Using a Sextant at Sea
Practice on Shore First
Before using a sextant at sea, hone your skills on stable ground.
01
Choose Calm Conditions
Taking a sight on a [itching deck is challenging; pick moments when the sea state allows for steadier readings.
02
Use Sun Filters
When measuring the sun’s altitude, always use the appropriate filters to protect your eyes.
03
Take Multiple Sights
The more readings you take, the more accurate your calculations will be.
04
Keep the Sextant Dry and Clean
Salt and moisture can affect the mirrors and moving parts.
05
Customization Process
Set a Strategy
Determine quantity, style and delivery time.
Sign Contract
Provide efficient, high-quality services.
Production
Strict control and quality control at all levels.
Delivery
Delivery to customers according to contract time.
We're well-known as one of the leading nautical equipment manufacturers and suppliers in China. If you're going to buy high quality nautical equipment made in China, welcome to get more information from our factory.