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Boaters' Resale Shop of TX 2503 0557.17 MARK 25 SEXTANT & ARTIFICIAL HORIZON BY DAVIS with MANUALS & CASE * DAVIS INSTRUMENTS MARK 25 MASTER BEAM CONVERGER SEXTANT (J83006) & ARTIFICIAL HORIZON NAVIGATION KIT * SEE ALL 8 PHOTOS & DETAILS * SOLD IN CONDITION PICTURED * TWO AAA BATTERIES NOT INCLUDED * ITEM WAS PREOWNED, USED, IS IN FAIR PHYSICAL CONDITION AND APPEARS TO BE OPERATING PROPERLY BUT HAS NOT BEEN TESTED FURTHER * TWO AAA BATTERIES NOT INCLUDED *
MARK 25 DESCRIPTION
Many experienced navigators prefer the plastic-framed Mark 25 to metal sextants for some very good reasons, and affordability is only one of them. The instrument’s light weight makes it easier to hold steady for accurate reading. Replaces the conventional half-silvered mirror with a full-field dielectric beam converger and combines horizon and celestial images in a single field for easy, reliable sights even in low light conditions. LED illumination floods the arc and drum with soft light for night use.
Frame Material: Reinforced plastic, upgraded for stability
Sighting System: Full-field beam converger
Scope Magnification: 3 x 27mm
Filter Shields: Seven large sunshades
Arc Range: 120° to -5° of arc
Drum Calibration: 2/10 minute of arc
Lighting: LED Illumination
Weight: 16.5oz.
Case: Padded shock-resisting case
Included Accessories: Well-written instructions and case
Davis Artificial Horizon 144
Answers the need of every sextant user who cannot depend on a natural sea horizon.
Use for backyard practice, finding exact position when inland, and making exact sextant shot on foggy mornings.
To use, fill with water and read the angle of the reflected sun with your sextant. Half your sextant reading is the sun's angle above the true horizon. Windproof and corrosion resistant, the reflecting surface is completely enclosed.
Comes with two sun shades, a lid and full directions.
Compact 6" x 4" x 1-1/2" (15 x 10 x 4 cm).
MARK 25 DESCRIPTION
Many experienced navigators prefer the plastic-framed Mark 25 to metal sextants for some very good reasons, and affordability is only one of them. The instrument’s light weight makes it easier to hold steady for accurate reading. Replaces the conventional half-silvered mirror with a full-field dielectric beam converger and combines horizon and celestial images in a single field for easy, reliable sights even in low light conditions. LED illumination floods the arc and drum with soft light for night use.
Frame Material: Reinforced plastic, upgraded for stability
Sighting System: Full-field beam converger
Scope Magnification: 3 x 27mm
Filter Shields: Seven large sunshades
Arc Range: 120° to -5° of arc
Drum Calibration: 2/10 minute of arc
Lighting: LED Illumination
Weight: 16.5oz.
Case: Padded shock-resisting case
Included Accessories: Well-written instructions and case
Davis Artificial Horizon 144
Answers the need of every sextant user who cannot depend on a natural sea horizon.
Use for backyard practice, finding exact position when inland, and making exact sextant shot on foggy mornings.
To use, fill with water and read the angle of the reflected sun with your sextant. Half your sextant reading is the sun's angle above the true horizon. Windproof and corrosion resistant, the reflecting surface is completely enclosed.
Comes with two sun shades, a lid and full directions.
Compact 6" x 4" x 1-1/2" (15 x 10 x 4 cm).
Specifications
| Condition | Used |
|---|---|
| Brand | DAVIS INSTRUMENTS |
| Manufacturer Part Number | MARK 25 (MASTER J83006) & 144 |
| Condition Description | DAVIS INSTRUMENTS MARK 25 MASTER BEAM CONVERGER SEXTANT (J83006) & ARTIFICIAL HORIZON NAVIGATION KIT * SEE ALL 8 PHOTOS & DETAILS * SOLD IN CONDITION PICTURED * TWO AAA BATTERIES NOT INCLUDED * ITEM WAS PREOWNED, USED, IS IN FAIR PHYSICAL CONDITION AND APPEARS TO BE OPERATING PROPERLY BUT HAS NOT BEEN TESTED FURTHER * TWO AAA BATTERIES NOT INCLUDED |
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