Sextant Davis Mark 3 — Reliable Training and Backup Celestial Navigator

The Davis Mark 3 is a full‑size marine sextant designed to make celestial navigation accessible, dependable and enjoyable. Purpose‑built for students, sailors and expedition teams, it combines a robust molded construction with a clear, easy‑to‑read vernier scale, integrated sunshades and a no‑batteries, no‑electronics philosophy that works anywhere on Earth. Whether you are learning your first sights or building redundancy into your navigation toolkit, the Mark 3 delivers practical accuracy for real‑world use at a highly attractive price—available with expert support from Stratosens.com.

Key Benefits and Applications

• Learn celestial navigation with confidence — The intuitive layout, labeled components and included instruction booklet help beginners progress quickly from first sight to plotted position.
• Dependable backup at sea — As a non‑electronic instrument, it remains ready when power fails or GNSS coverage is unavailable, making it a smart addition to any offshore grab‑bag or emergency kit.
• Clear sights in bright conditions — Built‑in sunshades reduce glare so the Sun can be brought down to the horizon comfortably and safely during daytime observations.
• Full‑size handling — A stable, full‑size frame improves grip and control on deck, supporting steadier sights and repeatable measurements.
• Durable and corrosion‑resistant — The rugged polymer body and mirrors are designed for the marine environment, resisting salt and UV for long service life with minimal maintenance.
• Perfect for teaching and clubs — An affordable, reliable choice for sailing schools and navigation courses that need multiple units for hands‑on training without compromising functionality.

Featured technical specifications

• Measurement range — Graduated arc designed for typical marine celestial work, covering angles from 0° up to 120° for Sun, Moon, planet and star sights.
• Reading resolution — Vernier scale readable to approximately 2 arcminutes, enabling practical position fixes when sights are averaged with good technique.
• Optics and viewing — Naked‑eye peep sight without telescope for simplicity and low weight, ideal for training and emergency use.
• Mirror system — Index mirror and half‑silvered horizon mirror provide a bright, split‑image view to superimpose the celestial body on the sea horizon.
• Sun protection — Integrated index and horizon sunshades support comfortable, glare‑controlled observations in daylight.
• Construction — Heavy‑duty molded polymer frame and arc for corrosion resistance, dimensional stability and easy care in saltwater environments.
• Scales and controls — Clearly marked degree arc with vernier for fine reading, plus accessible adjustment screws to set and check index error before shooting sights.
• Included materials — Supplied with an instruction booklet that walks through pre‑sight checks, taking sights and basic sight reduction.
• Compatible accessories — Works with commonly used training aids such as an artificial horizon and optional carry case for protected transport and storage.

Why the Davis Mark 3 is the perfect choice

Combining practicality, durability and value, the Davis Mark 3 delivers everything most navigators need to train effectively and maintain a robust backup to electronic systems. Choose yours at Stratosens.com to benefit from curated, marine‑proven instrumentation, fast dispatch, and knowledgeable support that helps you get the most from every sight you take.