Navigation compass built for demanding outdoor navigation and precise map work, presented as Silva Expedition 4 Compass. Durable construction and luminous markings bring confidence on long expeditions and night operations. Is carrying a specialist navigation tool worth the extra weight on every trip?
⚡ At a Glance
- • Navigation Accuracy: Precise bearing readings aided by declination adjustment, sapphire jewel bearing and rotatable housing
- • Best for: Experienced navigators, outdoor professionals and rescue personnel requiring exact map work
- • Not ideal for: Casual walkers or beginners who prefer simpler, entry-level compasses
Full-size baseplate includes multiple map-measuring scales and an integrated magnifying lens. Luminous markings and robust construction maintain reliable use in low light and harsh conditions.
Accurate Map Work – with dedicated 1:25k, 1:40k and 1:50k scales
Scales printed in millimetres and inches combine with a magnifying lens for precise distance measurement on standard topographic maps. A rotatable housing aligns with the Silva 1-2-3 navigation system to plot bearings accurately.
Measure and plot distances quickly on common map scales, reducing time spent estimating. Suited to route planning where map precision matters.
Reliable Night Navigation – thanks to luminous markings
Luminous markings activate after exposure to light and remain visible for up to six hours, enabling orientation and quick bearing checks in low-light conditions.
Perform route-finding at dusk or during overnight legs with readable markings. Less dependence on a torch for rapid checks speeds up navigation.
Durable, Stable Operation – with sapphire jewel bearing and silicon friction feet
A sapphire jewel bearing reduces needle friction for rapid, stable settling while silicon friction feet hold the baseplate steady on maps; a detachable lanyard adds safety and accessibility.
Needle settles quickly for accurate readings and the base remains steady during plotting. Rugged components resist tough weather on extended trips.
✨ The 4 Key Reasons for Silva Expedition 4 Compass
- Map Measuring Scales – Measure distances precisely on 1:25k, 1:40k and 1:50k maps.
- Declination Adjustment & GPS Functionality – Allow correction for local declination and integration into GPS workflows.
- Luminous Markings – Provide up to six hours of illumination after activation in light.
- Sapphire Jewel Bearing – Ensure fast, stable needle settling for accurate bearings.
📋 Technical Details at a Glance
- Category: Sports / Navigation compass
- Brand: Silva
- Model: Expedition 4
- Type: Full-size baseplate compass
- Map Scales: 1:25k, 1:40k, 1:50k (mm & inches)
❓ Frequently Asked Questions
Q: Is the compass suitable for night navigation?
A: Yes, luminous markings remain visible for up to six hours after activation in light, supporting low-light orientation and bearing checks.
Q: What map scales are included for distance measurement?
A: Includes 1:25k, 1:40k and 1:50k scales in millimetres and inches, plus an integrated magnifying lens for precise map work.
Q: Who is the Expedition 4 aimed at?
A: Designed for experienced navigators and rescue professionals, the full-size baseplate and advanced features suit demanding and technical navigation tasks.
🏆 Our Verdict
Ideal for experienced navigators and rescue teams who need reliable, precise map work in challenging conditions. Robust construction, sapphire jewel bearing and multiple map scales combine to make navigation straightforward in daylight and at night. While likely an investment for casual users, durability and practical features deliver strong long-term value for regular users.
