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This section provides an overview for magnetic compasses as well as their applications and principles. Also, please take a look at the list of 10 magnetic compass manufacturers and their company rankings. Here are the top-ranked magnetic compass companies as of December, 2024: 1.SINGHLA SCIENTIFIC INDUSTRIES, 2.Northrop Grumman Sperry Marine, 3.AMI Marine Co., Ltd.
Table of Contents
A magnetic compass is an instrument used to measure the Earth's magnetic field and determine direction.
The magnetic compass installed in aircraft used to be primarily a simple device consisting of a directional magnet and a scale. Nowadays, instruments indicating direction are often derived from information obtained by a magnetic sensor located at the tip of the wing, known as a Horizontal Situation Indicator (HSI).
The direction displayed by the magnetic compass includes composite errors. Deviation represents the angle between the true North Pole and the magnetic North indicated by the compass. Variation is the angle between the magnetic North and the North indicated by the compass, also known as magnetic variation. The magnetic heading indicated by the compass is the sum of deviation and variation concerning the true North.
Errors also include dynamic errors that occur when the aircraft changes its heading or accelerates/decelerates.
The magnetic compass installed in aircraft serves as an instrument to inform pilots about the heading of the aircraft. It has been used since the early days of aviation, comparing favorably to other instruments.
However, the direction indicated by the magnetic compass always includes errors such as deviation and variation. Pilots must correct these errors to determine the correct heading.
On the other hand, methods for aircraft to determine direction have advanced in various ways. Techniques such as relying on radio waves emitted from ground-based antennas to determine the aircraft's position and direction or receiving signals from satellites for position and direction information have been developed and put into practical use.
Nevertheless, the magnetic compass remains an essential instrument, still installed in the cockpit today.
*Including some distributors, etc.
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Singhla Scientific Industries, established in 1956 and headquartered in Ambala, Haryana, India, is a manufacturer, exporter, and supplier of a diverse range of laboratory equipment. Its product offerings encompass laboratory microscopes, pipettes, triple beam balances, borosilicate glassware, as well as spectrometers, microscope equipment, and rotary evaporators. These products cater to the expanding needs of the laboratory industry and find application in medical, nursing colleges, pharmacy colleges, school labs, and beyond.
Shreeji Instruments, established in 2008 in India, is a supplier engaged in trading and supplying a wide range of construction material testing and surveying equipment. Company’s products are sourced from dependable manufacturers adhering to international quality standards. The assortment includes equipment for cement and concrete testing, safety items, and various measuring instruments. Aligned with industry standards and guidelines, its range covers soil and sand testing, bitumen testing, construction equipment, geodetic tools, and more.
Sadana Brothers, established in 1984 and headquartered in Jharkhand, India, is a manufacturer of scientific instruments and equipment. The company specializes in electrophoresis power supply, tripod magnifier stool-type table tops, microscope slides with depression, and more. Its products span heat transfer lab equipment, optical instruments and devices, and Glassware Instruments, serving various sectors, including medical colleges, institutes, and centers. The company provides electricity and magnetic, science, and biology instruments, employing raw materials and technologies in fabrication.
Amrit Scientific Ind. Private Limited, established in 1965 and located in New Delhi, India, is a supplier, distributor, and manufacturer of laboratory equipment, medical equipment, and blood collection tubes. The company offers a diverse range of products, including parafilm tape, stainless steel scissors, food-grade nitrile gloves, examination gloves, and vernier calipers. These products are used for sealing containers in laboratories, precise cutting, maintaining hygiene, ensuring safety in medical settings, and providing accurate measurements in industries like manufacturing and research. These products are used in scientific research, medical facilities, educational institutions, and industries such as healthcare and food handling.
China Deyuan Marine Fitting Company Limited, established in 2009 in Zhuhai, China, is a manufacturer and supplier of marine and offshore equipment. In 2013, it expanded further by establishing Deyuan Marine Co., Ltd (Zhuhai City Deyuan Import and Export Company Limited) as its subsidiary. The company’s product line includes marine life saving equipment, marine fire fighting equipment, environment protection equipment, marine mooring equipment, and marine power and propulsion equipment engines. Its products comply with SOLAS (Safety of Life at Sea) regulations and are approved by various Classification Societies, including ABS, CCS, DNV, and IRS.
Ranking as of December 2024
Derivation Method| Rank | Company | Click Share |
|---|---|---|
| 1 | SINGHLA SCIENTIFIC INDUSTRIES |
27.9%
|
| 2 | Northrop Grumman Sperry Marine |
14.4%
|
| 3 | AMI Marine Co., Ltd |
11.5%
|
| 4 | China Deyuan Marine Fitting Company Limited |
8.7%
|
| 5 | Ruian Shunfeng Navigation Instruments Co.,Ltd |
6.7%
|
| 6 | Zhenjiang Matchau Marine Equipment Co.,Ltd. |
6.7%
|
| 7 | SADANA BROTHERS |
6.7%
|
| 8 | Amrit Scientific Ind. Private Limited |
6.7%
|
| 9 | Nantong Saiyang Electronics Co.,Ltd |
5.8%
|
| 10 | Shreeji Instruments |
4.8%
|
Derivation Method
The ranking is calculated based on the click share within the magnetic compass page as of December 2024. Click share is defined as the total number of clicks for all companies during the period divided by the number of clicks for each company.Number of Employees
Newly Established Company
Company with a History
*Including some distributors, etc.
| Country | Number of Companies | Share (%) |
|---|---|---|
|
India
|
4 | 80.0% |
|
China
|
1 | 20.0% |
