Hawke Endurance ED Marine 7x42

• 7× Magnification in a Single-Tube Marine Monocular Format: The 7× magnification is the standard recommendation for marine optics, providing a stable hand-held image on a moving vessel where the combined motion of waves and vessel movement makes higher magnification difficult to use effectively. The monocular format delivers the marine-optimised optical specification of the Endurance ED Marine range in a significantly lighter and more compact single-tube design — at just 405 g and 80 mm wide × 159 mm high — suited to sailors and boaters who prefer a single monocular over a full binocular.
• Integrated Compass with Rangefinder Reticle — Compass Variant Only: The Compass variant (art. no. 36521) incorporates a built-in integrated compass that projects a bearing display into the field of view, allowing the user to read their heading or the bearing to any observed object without breaking observation. A rangefinder reticle is also visible in the field of view for distance estimation. The compass is optimised for northern hemisphere latitudes (Europe and USA). The standard 7×42 (art. no. 36520) omits the compass and rangefinder reticle. Both variants weigh 405 g.
• 42mm Objective Lens with 6mm Exit Pupil and ED Glass: The 42mm objective lens at 7× magnification produces a 6mm exit pupil — supporting good image brightness in the variable and reduced-light marine environment during overcast conditions and low-light periods. The Extra-Low Dispersion (ED) glass reduces chromatic aberration and colour fringing for a clean, neutrally rendered image on the high-contrast subjects encountered at sea. The phase corrected BAK-4 roof prism and fully multi-coated lenses maintain resolution and contrast across the full aperture.
• Floating Wrist Strap — Essential for Marine Use: Both variants are supplied with a floating wrist strap — keeping the monocular buoyant on the water surface if accidentally dropped overboard. Note that the marine monoculars use a wrist strap rather than the neck strap supplied with the marine binoculars — more practical for single-handed monocular use on deck. The field of view of 131 metres at 1,000 metres and 17mm of eye relief support comfortable scanning on open water.
• Waterproof, Fogproof with Tripod Thread and Stay-On Covers: The body is nitrogen purged, waterproof, and fogproof with the distinctive blue high-grip rubber exterior of the Endurance ED Marine range. A built-in ¼"-20 UNC tripod mounting thread enables use on a vessel mount or chart table holder. Stay-on objective lens covers remain attached during use. Close focus distance of 2 metres covers close-range identification when needed.

About the Endurance ED Marine Series

The Hawke Endurance ED Marine series is Hawke's dedicated marine optics range, built on the H5 optical system with Extra-Low Dispersion (ED) glass and phase corrected BAK-4 roof prisms configured for marine and boating use. All models feature 7× magnification, ED glass, phase correction, full waterproofing, floating straps, and the distinctive blue rubber-armoured finish.

The monocular sub-series covers two configurations — the 7×42 (art. no. 36520) without compass and the 7×42 Compass (art. no. 36521) with integrated compass and rangefinder reticle — providing a lightweight single-tube alternative to the binocular models for mariners and boaters who prefer a compact monocular format for on-water observation.

About the Model (Hawke Endurance ED Marine 7x42 Monocular)

The Hawke Endurance ED Marine 7x42 Monocular is a purpose-built marine monocular designed for sailors, coastal walkers, anglers, and boaters who require the optical quality and marine-specific features of the Endurance ED Marine range in a single-tube format. The 7× magnification with a 42mm objective lens delivers a field of view of 131 metres at 1,000 metres, an exit pupil of 6mm, and an apparent field of view of 53° in a package that weighs just 405 g — significantly lighter than any binocular in the Marine lineup.

The ED glass reduces chromatic aberration and colour fringing for a clean image in the high-contrast marine environment, while the phase corrected BAK-4 roof prism and fully multi-coated lenses maintain resolution and contrast. The close focus distance of 2 metres extends usability to close-range targets. The 17mm of eye relief and twist-up eyecup with position stops accommodate both bare-eyed and eyeglass-wearing users.

The Compass variant (art. no. 36521) adds a built-in integrated compass and rangefinder reticle visible in the field of view — enabling heading reading and distance estimation without breaking observation. The compass is optimised for northern hemisphere latitudes. Both variants weigh identically at 405 g and share all optical and mechanical specifications. Both are supplied with a floating wrist strap and stay-on lens covers. The built-in ¼"-20 UNC tripod mounting thread supports use on a vessel mount. The body is nitrogen purged, waterproof, and fogproof with a blue high-grip rubber exterior. Dimensions are 80 mm wide × 159 mm high.

About Hawke

Hawke Optics is a British optics brand registered in England and Wales, with products distributed across Europe, North America, and international markets. The company produces a broad range of optical products including riflescopes, airgun scopes, crossbow scopes, red dot sights, reflex sights, binoculars, monoculars, spotting scopes, marine optics, and laser rangefinders, covering applications from hunting and precision shooting to nature observation and marine use.

Hawke organises its product lineup into distinct optical system tiers — from the entry-level H2 through H5 to the flagship H7. The Endurance series is built on the H5 system, representing the mid-tier of Hawke's product range across binoculars, monoculars, riflescopes, spotting scopes, red dot sights, rangefinders, and marine optics.

Main Features

• Type: Monocular
• Magnification: 7×
• Objective Lens Diameter: 42 mm
• Prism System: BAK-4 Roof Prism, Phase Corrected
• Prism Coating: Silver Mirror Coating
• Lens Type: Extra-Low Dispersion (ED) Glass
• Field of View: 131 m @ 1,000 m / 393 ft @ 1,000 yds
• Apparent Field of View: 53°
• Eye Relief: 17 mm
• Exit Pupil: 6 mm
• Close Focus Distance: 2 m / 6.6 ft
• Eyecup: Twist-Up with Position Stops
• Eyecup Diameter: 43 mm
• Compass: No (36520) / Yes, northern hemisphere (36521)
• Rangefinder Reticle: No (36520) / Yes (36521)
• Tripod Mounting Thread: Yes (¼"-20 UNC)
• Lens Coating: Fully Multi-Coated
• Optical System: H5
• Construction: Nitrogen purged, waterproof, fogproof
• Dimensions (W × H): 80 × 159 mm
• Weight: 405 g
• Colour: Blue

Warranty

The monocular is covered by a 10-year warranty.

In the Box

• Monocular
• Protective Carry Case
• Protective Pouch
• Floating Wrist Strap
• Objective Lens Cover (Stay-On)
• Ocular Lens Cover
• Lens Cloth
• Instruction Manual