Tritium Compass – Hand Bearing

Tritium Compass – Hand Bearing

The Plastimo Iris 50 Hand Bearing Compass, enhanced with Betalight illumination, offers two illumination options: a continuous Betalight source for preserving night vision, or a photoluminescent/glow-in-the-dark backplate. The compass features a prism that eliminates parallax errors by projecting the reading to infinity, and a wide 20° field of view for optimal bearing conditions.

Available in various colors, the Iris 50 is supported by a 5-year warranty.

 

Features

  • Dual-use: Hand bearing and traditional compass
  • No batteries, bulbs, parts, or switches: Maintenance-free operation
  • Optimized performance: For accurate reading and bearings
  • Neck cord: For easy deployment
  • Protection: Good against hard knocks, smooth finish that doesn’t slip even when wet
  • Legibility: Outstanding card readability with one-degree graduations
  • Accuracy: Pivot and hard stone ensure long life and shock resistance
  • Bottom cell: Soft, ultrasonic welding to prevent bubbles and leaks
  • Illumination: Built-in tritium, maintenance-free, corrosion-resistant, operates without batteries, lifetime >15 years
  • Reading method: Course reading from above the compass without using the prism
Tritium compass in light and dark application

Specifications

Operation Temperature Range -20°C to +60°C
Water Resistance Up to 50 meters depth
Available Colors Army green, desert/sand, blue, yellow, orange
Field of View 20°
Casing Material Smooth, non-slip finish, ergonomic design
Accuracy One-degree graduations, no parallax error
Dimensions Standard dimensions not specified
Weight Standard weight not specified
Warranty 5 years
Protection Features Shock-resistant, prevents bubbles and leaks, corrosion-resistant, durable pivot and stone
Calibration Northern Hemisphere standard

Illumination Options

  • Betalights®: Fixed securely within the unit, using gaseous tritium activation of phosphor in a sealed glass tube, providing a reliable light source with a service life of 10 years. Maintenance-free with no moving parts.
  • Photoluminescent/Glow-in-the-Dark Backplate: Requires no electrical power supply, charged in ambient lighting conditions, gradually reducing in brightness over 60 minutes.

Frequently Asked Questions

The tritium vial provides continuous illumination with a half‑life of about 12.3 years.

Yes, the anodised aluminium housing is fully waterproof and suitable for maritime use.

This compass is designed for maritime navigation, outdoor trekking, tactical operations, and orienteering.

No calibration is needed. The compass is pre-aligned and sealed, requiring no maintenance. Just store it in a dry, secure place when not in use.

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