NV-20 Compass Necklace - Rugged and reliable navigation aid with precision luminous dial and photoluminescent lamp. UK-made.

• A rugged and reliable navigation aid. Can be used day and night, in all weather conditions.
• Featuring a shockproof, military-grade compass; precision luminous dial, fluid-damped and built to keep working in extreme conditions.
• Also features a photoluminescent lamp on the reverse side, for map reading and as a personal marker. Gentle illumination; ideal as it won’t ruin dark-adapted vision.
• Oil and seawater resistant TPU construction ensures the NV-20 will last under field use. The ideal backup to other, larger navigation devices such as GPS or a lensatic compass, which could fail to work due to flat batteries, extreme conditions or damage.
• Size: 35mm x 27mm x 13.5mm. Cord length: 400mm loop (800mm total). Weight: 11.6g. Made in the UK by Polymath Products.

The NV-20 Compass Necklace is a compact navigation accessory that is designed to keep working when other devices may have failed. Due to its small size, low weight and rounded ergonomic design it can be comfortably carried at all times. It is ideal for daily wear around the neck, perfectly placed for making quick checks of heading, to make sure you are not off-course. Very accurate for its size, the 20mm diameter compass was specially designed and is a far cry from many other 'button' compasses available. It is tough, shockproof, and built to last. Equally capable of both day and night navigation thanks to the very best in photoluminescent GITD (glow-in-the-dark) material. The compass is easily readable in the dark, and just a few seconds of light from a flashlight will 'recharge' it. The NV-20 also features a photoluminescent lamp on the underside, similarly charged by light exposure. After charging, it provides sufficient illumination for reading maps or text in the dark, and functions as a personal marker. The NV-20 is extremely durable, with oil and seawater resistant construction. It can be used underwater and at extreme altitudes. NV-20 dimensions: 35mm x 27mm x 13.5mm. Cord length: 400mm loop (800mm total). Weight: 11.6g. Product for use by adults only, or under close adult supervision.