A good pair of binoculars is one of the most-used pieces of gear on any sailboat. You use them to pick out buoys and marks, identify lights at night, check which way a ship is heading, read the water ahead and spot your anchorage. Sailing binoculars need to cope with spray, motion and low light, which is why marine models look so different from birding or hunting glasses.

Quick answer: for most sailors, 7×50 waterproof, nitrogen-purged binoculars are the best choice. The 7x magnification is steady enough to use on a moving boat, and 50 mm lenses gather plenty of light at dusk and dawn. A built-in compass is useful for taking bearings. If budget allows, image-stabilized binoculars give the steadiest view of all. Whatever you choose, add a floating strap.

How to Choose Binoculars for Sailing

Magnification and lens size

Binoculars are described by two numbers, such as 7×50. The first is magnification; the second is the diameter of each objective lens in millimeters. Higher magnification sounds better, but every bit of boat motion and hand shake is magnified too. On a moving deck, anything above 7x or 8x quickly becomes hard to hold steady, which is why 7×50 is the classic marine standard.

Larger lenses let in more light. Divide the lens size by the magnification to get the exit pupil: a 7×50 has an exit pupil of about 7 mm, which is excellent in low light. A compact 8×30 has under 4 mm, so it is less bright at dusk but much lighter.

Configuration	Best for	Trade-off
7×50	All-round sailing, low light, night watches	Heavier and bulkier
8×30 / 8×42	Day sailing, racing, compact storage	Less bright at dusk; more shake
10x and above	Image-stabilized models only	Hard to hold steady without stabilization

Field of view

Field of view is how wide an area you can see, usually given in feet at 1,000 yards (or meters at 1,000 m). A wide field makes it much easier to find a buoy or another boat in the first place. Higher magnification narrows the field of view, another reason why 7x is popular on boats.

Focus: center or individual

Center-focus binoculars use one wheel to focus both sides at once, with a diopter adjustment for one eye. Many marine binoculars use individual eyepiece focus instead: you set each eye once and, because most things you look at on the water are far away, everything stays sharp without refocusing. That is handy when you need to grab them quickly, but less convenient when several crew with different eyesight share one pair.

Waterproof and fogproof

Marine binoculars should be sealed with O-rings and purged with nitrogen or argon so moisture cannot get in and the inside of the lenses will not fog. Waterproof ratings vary, so check what the manufacturer says about immersion. Even waterproof binoculars can get spray and condensation on the outer lenses, so carry a lens cloth.

Compass and rangefinder reticle

Many marine binoculars include a built-in compass, displayed in the view, so you can take a bearing on a landmark or check whether a ship’s bearing is changing (a steady bearing with decreasing range means a risk of collision). A rangefinder reticle lets you estimate the distance to an object of known height. Both are useful backups to a chartplotter and radar.

Image stabilization

Image-stabilized binoculars use a battery-powered system to cancel out hand shake and some boat motion. They allow higher magnification on a moving boat and are a real pleasure to use. The downsides are price, the need for batteries and, on some models, limited weatherproofing.

Eye relief, coatings and floating straps

• Eye relief: if you wear glasses or sunglasses, look for long eye relief and twist-up or fold-down eyecups.
• Lens coatings: fully multi-coated lenses and BaK-4 prisms give brighter, sharper images and reduce glare from the water.
• Armor: rubber armor protects against knocks and gives a better grip with wet hands.
• Floating strap: few full-size binoculars float on their own. A floating strap is cheap insurance.

Best Binoculars for Sailing

Here are popular options for different budgets and types of sailing. Models and versions change, so check current availability and specifications before buying.

1. Steiner 7×50 Navigator Pro: classic marine binocular with compass

The Steiner 7×50 Navigator Pro is a traditional marine binocular from a German manufacturer known for rugged optics. It has the ideal 7×50 configuration, high-contrast coatings, a waterproof, rubber-armored body and a built-in compass whose display sits at the edge of the view so it does not block the image. A great choice for cruisers who want one pair that does everything.

• Pros: excellent low-light performance, compass, tough build
• Cons: heavier than compact models; premium price

2. Steiner Military-Marine 8×30: compact and tough

The Steiner 2033, model 830 is a compact 8×30 from Steiner’s Military-Marine range. It is rugged, waterproof and much smaller than a 7×50, and Steiner’s focus-free design keeps most distant objects sharp without constant adjustment. It does not have a compass or rangefinder, and its smaller lenses are not as bright at night, so it suits day sailing, racing and small boats best.

• Pros: compact, light, very tough
• Cons: no compass; less light-gathering than 7×50

3. Bushnell Marine 7×50: compass and rangefinder on a budget

The Bushnell Marine 7×50 offers the classic marine setup at a moderate price: 7×50 optics, a waterproof, nitrogen-purged housing, an analog compass and a rangefinder reticle for estimating distance. Fold-down lens caps keep the lenses clean. A solid choice for most cruising sailors.

• Pros: compass and rangefinder, good value, waterproof
• Cons: optics not as refined as premium brands

4. Fujinon Mariner 7×50: comfortable all-rounder

The Fujinon Marine Binoculars (Mariner 7×50) are comfortable to hold for long periods thanks to their rubber eyecups and give a bright, sharp view in daylight. Individual eyepiece focus makes them quick to use once set. Some versions include a compass. Many sailors use them as a main pair; others keep them as a reliable backup.

• Pros: comfortable, bright, good value for 7×50
• Cons: individual focus is less convenient for sharing

5. Nikon OceanPro: dependable mid-range choice

The Nikon binoculars in the OceanPro line are waterproof, fogproof 7×50 marine binoculars with a reputation for clear optics and good contrast. A version with a built-in compass is available, as well as a cheaper version without one, which may suit sailors who rely on a chartplotter for bearings. Add a floating strap.

• Pros: good optics, trusted brand, compass option
• Cons: fewer extras than some rivals

6. Canon 10×30 IS II: image-stabilized

The Canon 1030 IS II uses Canon’s image stabilization to steady the view at the press of a button, which makes 10x magnification usable on a boat. It runs on two AA batteries, with battery life dropping sharply in cold weather. It has limited weather protection, so keep it out of spray and store it below when not in use, and its eye relief is on the short side for glasses wearers.

• Pros: very steady image, compact, higher magnification
• Cons: needs batteries; not built for heavy spray; no compass

7. Vortex Crossfire HD: sharp all-purpose binoculars

The Crossfire HD from Vortex is an all-purpose binocular with fully multi-coated lenses, nitrogen purging, O-ring seals and rubber armor. Center focus and twist-up eyecups make it easy to share and comfortable with glasses. It comes with Vortex’s GlassPak harness case. It is not a dedicated marine binocular (no compass or rangefinder), but it works well for coastal and day sailing.

• Pros: sharp optics, waterproof, good harness case
• Cons: no marine-specific features; higher magnification models are harder to hold steady

8. Aomekie 7×50: budget marine binocular

The Aomekie 750 is an affordable 7×50 with BaK-4 prisms, waterproofing, and an illuminated compass and rangefinder reticle. It is a reasonable choice for occasional sailors or as a second pair. Check the current waterproof and floating claims for the version you buy, and use a floating strap.

• Pros: low price, compass and rangefinder
• Cons: build and optical quality below premium brands

9. Hooway 7×50: budget compass binocular

The Hooway binoculars are another budget 7×50 with a built-in compass, rangefinder reticle, nitrogen purging and a thick non-slip rubber body. A carry bag and tripod adapter are included. Fine for casual use, although optics and durability are not on a par with Steiner or Fujinon.

• Pros: very affordable, compass and reticle
• Cons: heavier and less refined

10. Glassowl Night Vision: digital night vision

The Glassowl IR binoculars are digital night vision binoculars that use an infrared illuminator and a screen to show an image in darkness. They can help you pick out moorings, docks and objects at short range at night. They are not traditional marine binoculars: they are not designed for heavy spray, their range is limited, and they do not replace a proper searchlight, radar or lookout.

• Pros: see in near-total darkness at short range, can record images
• Cons: limited range and resolution; needs batteries; not marine-grade

Quick Comparison

Binoculars	Type	Compass	Best for
Steiner 7×50 Navigator Pro	7×50 marine	Yes	Cruising, night watches
Steiner Military-Marine 8×30	8×30 compact	No	Day sailing, racing
Bushnell Marine 7×50	7×50 marine	Yes (plus reticle)	Value cruising pair
Fujinon Mariner 7×50	7×50 marine	Some versions	All-round use
Nikon OceanPro	7×50 marine	Optional	Mid-range all-rounder
Canon 10×30 IS II	Image-stabilized	No	Steady view, longer range
Vortex Crossfire HD	General purpose	No	Coastal, day sailing
Aomekie 7×50	Budget marine	Yes	Second pair
Hooway 7×50	Budget marine	Yes	Casual use
Glassowl Night Vision	Digital IR	No	Short-range night use

Using and Caring for Marine Binoculars

• Brace yourself against the boat, or rest your elbows, to steady the view. On a rolling boat, brace your body and let your knees absorb the motion.
• Find the object with your eyes first, then raise the binoculars without moving your head.
• Rinse saltwater off with fresh water if they are waterproof, then dry them and clean lenses with a proper lens cloth.
• Keep them in a padded holder near the helm or companionway so they are always to hand, and use the neck strap.

Binoculars are part of a wider safety kit. See our guides to must-have boat safety equipment and cruising sailboat equipment essentials, and if you are buying gear for a sailor, our gift ideas for boaters and sailors. Good eye protection helps too, so take a look at our best sailing sunglasses.

Best Binoculars for Sailing: Summary

• 7×50 waterproof, fogproof binoculars are the best all-round choice for sailing.
• A built-in compass helps with bearings and collision checks; a rangefinder reticle helps estimate distance.
• Compact 8x30s suit day sailing and racing; image-stabilized binoculars give the steadiest view at higher magnification.
• Look for good coatings, enough eye relief if you wear glasses, and always add a floating strap.