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Sextants – equipment for astronomical navigation

A sextant is used for astronomical navigation by measuring the angle between a celestial body – such as the sun or a star – and the horizon. Together with nautical almanacs, you can calculate your position at sea without using GPS.

At Navigasjonsbutikken Kart.no AS you will find sextants from Cassens & Plath, Celestaire and Davis Instruments, as well as accessories for navigation with sextants and training in astro-navigation.

Cassens & Plath sextants

Cassens & Plath sextants are among the world’s most precise navigation instruments and are manufactured in Germany. The instruments are used by long-distance sailors, navigation schools and maritime institutions all over the world.

Celestral sextants

Professional metal sextants used by long-distance sailors, navigation courses and maritime institutions. The Astra series is known for its high precision and solid construction.

Davis sextants

Professional metal sextants used by long-distance sailors, navigation courses and maritime institutions. The Astra series is known for its high precision and solid construction.

Mechanical ship chronometer from Wempe
Astronavigation

Chronometer and precise timekeeping

For astronomical navigation, precise time is crucial. A mechanical ship’s chronometer makes it possible to determine longitude with high accuracy – a method used at sea for over two hundred years.

Mechanical ship chronometer
Wempe Manufacture Caliber 5 – designed for precision navigation at sea
kr 337,500
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Artificial horizon and observation equipment

Auxiliary equipment for sextant observations when the natural horizon is not visible.

Optics and observation accessories

Optical aids and accessories for observation in astronomical navigation.

Spare parts

Spare parts for sextants and navigation instruments – contact us for availability and selection.

Storage and transportation

Cases and accessories for safe storage and transportation of sextants.

Books and navigation tables

Bøker, stjernekart, nautiske almanakker og navigasjonstabeller for astronomisk navigasjon. Celestial Navigation in the GPS Age forklarer metoder for himmelnavigasjon, The Star Finder Book viser hvordan du bruker stjernefinneren 2102-D, og The Nautical Sextant gir innsikt i sekstantens konstruksjon og mekanikk.

What is a sextant used for?

A sextant is a classic navigational instrument used to measure the angle between a celestial body and the horizon. With the help of nautical almanacs and navigation tables, latitude and longitude can be calculated without the use of electronic aids.

Astronomical navigation is still used by many long-distance sailors as a backup to GPS, and is also an important part of teaching classical navigation.

Whole Horizon or Split Horizon?

Hexagons are usually supplied with two types of horizon mirrors.

The Whole Horizon Mirror makes it easier to see the horizon and is often used by beginners and courses.
Split Horizon Mirror is the traditional solution where the horizon is seen directly through the mirror and is preferred by many experienced navigators.

Sextants at Navigasjonsbutikken Kart.no

The navigation shop Kart.no AS carries sextants and accessories for astronomical navigation from manufacturers such as Celestaire and Davis Instruments. The range includes training sextants, professional metal sextants and equipment for sextant navigation at sea.