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Freiberger Drum Sextant

Freiberger Drum Sextant

FPM-FG-TS-BLACK

Description

Freiberger Drum Sextant (Available in Black or Gray)

The traditional instrument for celestial position finding in sea. Comfortable weight and size with excellent balance from it’s well designed light metal alloy frame. Large horizon and index mirrors which are tested for optical flatness and parallelism. The clamping device and micrometer drum are fully enclosed for protection against dirt and water spray.

Standard telescope 4×40 is adjustable for height and fitted with a protective rubbers eyepiece. The correct amount of brightness through the sextants optical light paths is controlled by means of swing in graded filters 4 for the index and 3 for the horizon mirrors.

Option: Illumination device which is detachable (battery operated) 8 x 30 monocular telescope Can be supplied as a surveying sextant (for horizontal sights) and fitted whith a detachable penta prism to extend the measuring range to 215 degrees.

GERMANENGLISH
GradbogenGraduated arc
Teilungsradius 170 mmradius 170 mm
Teilungslänge -5° bis +125°scale of degrees -5° to +125°
Skalenwert 1°interval 1°
TrommeleinteilungDrum graduations
Skalenwert 1′interval 1′
Schätzung 0,1′visual interval 0.1′
FernrohrTelescope
Objektivöffnung 40 mm (od. 30 mm)lens aperture 40 mm (or 30 mm)
Vergrößerung 4-fach (8-x verfgb.)magnification 4-x (8-x avail.)
AbmaßeDimensions
Sextant 26 x 24 x 13 cmSextant 26 x 24 x 13 cm
HSS/VSS Durchmesser 65 mmHVM/FVM diameter 65 mm
Koffer 34 x 32 x 17 cmcarrying case 34 x 32 x17 cm
GewichtWeight
Trommelsextant 1,4 kgdrum sextant 1.4 kg
TS + Holzkoffer 4,0 kgDS + wooden case 4.0 kg
immer orientiertAlways orientated
• exakte Positionsfindung und -berechnung mittels Messung
des Höhenwinkels zwischen den Visierlinien Schiff-Kimm
und Schiff-Gestirn bzw. durch Horizontalwinkelmessung in
Küstennähe
• exact determination of your position and calculation by measuring elevation
angle between lines of sight (horizon and celestial body) or horizontal angle
measurement nearby coast respectively
unentbehrlichEssential features
• kaum störanfällig, unbeeinflusst durch Elektromagnetismus
• preiswert und einfach in der Handhabung
• lange Nutzungsdauer
• vorgeschriebene Ausrüstung zur Hochseenavigation
• barely susceptible, uninfluenced by electromagnetism
• reasonably priced and easy to handle
• long life time
• mandatory equipment for deep sea navigation
sichere NavigationReliable Navigation
• optimale Einstellungsgenauigkeit
• verzerrungsfreie Abbildung durch hochwertige Spiegel von geprüfter
Planheit, korrosionsfest versiegelt und feinfühlig justierbar
• ideal accuracy of adjustment
• unstretched reproduction of image (high quality mirrors of
verified flatness, corrosion resistant sealed and precisely
adjustable)

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