Probably the most resourceful compass in the world for artillery; target acquisition and command posts. The 55 is a unique compass featuring both an optical precision sighting system and a SILVA 1-2-3 SYSTEM compass in the same unit, giving unbeatable precision and versatility in the field. The compass has a luminous graduation ring and markings for compass reading in the dark. Once activated by daylight/flashlight it will give light up to 4 hours of light. 360 degrees on the graduation ring and 6400 mils 360 degrees on the sighting scale.
| Accuracy | /- 1 degree |
|---|---|
| Altitude use | 5000m @-15 °C |
| Clinometer | No |
| Declination adjustment | No |
| Graduation | 6400° / 360° |
| Illumination | 4 hours after activation in light |
| Impact resistance | 30g in XYZ directions and free fall from 1.5 m height into gravel |
| Magnifying lens | Yes |
| Material | Acrylic |
| Patented red/black N/S lines in capsule | Yes |
| Resolution degrees / mils | Outer ring: – / 50 Precision sighting scale: 1 / 20 |
| Scales | Baseplate: 1:25k, 1:40k, 1:50k, mm, inch |
| Settling time from 90° angle to complete rest | 6 sec |
| Settling time from 90° angle within ± 3° | 4 sec |
| Sighting System | Prismatic precision |
| Silicon friction feet | Yes |
| Size | 126 x 60 x 16 mm |
| Temperature operating range | -30 to 60 C |
| Type of compass | Baseplate, Lensatic precision sighting compass, Silva 1-2-3 System Mirror sighting compass |
| UTM position plotting scales (Romer scales) | 1:25k, 1:40k, 1:50k |
| Variant | Magnetic Equator, Magnetic North, Magnetic South |
| Water resistance | Waterproof |
| Weight | 39g |
![Ronstan ClearStart 40mm Sailing Watch- Blue [RF4054B]](https://www.tickstrap.shop/image/ronstan-clearstart-40mm-sailing-watch-blue-rf4054b_Qz0h5p_300x.webp "Ronstan ClearStart 40mm Sailing Watch- Blue [RF4054B]")
