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Solid Brass Engineers Compass 5"
This Hampton Nautical Solid Brass Engineering Lensatic Compass is available in a polished brass finish. The compass card has the standard 0 - 360 degree scale, as well as the 0 - 64 Mil scale (one yard at 1,000 yards). The cardinal points are luminous for easy viewing in the dark, and the compass features a standard glass bezel with two lines at 45-degree angles. The bezel also rotates with detents so you can change the heading reference a known amount without looking at the compass. The front sight has a magnifier to simultaneously view the magnetic heading when taking a sight. Folding the sight down operates a needle lift mechanism to protect the compass bearing. On the side of the compass is a needle freeze mechanism to hold a reading.
The lid of the compass has a glass window with a line etched into the glass for use as a rear sight. The outside of the compass has a brass guard to protect the glass. The back of the compass can be custom engraved with a minimum quantity purchase.
A wooden box is included with the compass.
- Polished brass housing for compass
- Luminous face cardinal points glow in the dark
- Rotating dial with detents for taking accurate bearings
- Dual scales marked 0-360 degrees and 0-64 mils
- Needle lift automatically operates to protect bearing
- Lensatic site for precise readings
- Handcrafted leather case to store compass
- Custom engraving available on large quantity orders (call us for information)
Used by engineers on land as well as at sea, the engineer’s compass played an integral part in navigation, mapping, and correcting a ship’s compass. As exploration expanded and the Industrial Revolution began, further changes were needed aboard ships to ensure accurate travels. Although ship deviation had been a minor factor with wooden ships, with the introduction of steel and iron hulls it became a problem that could vastly sway a ship’s travels. The solid hulls of these ships could become magnetized, and even with an ideally placed compass above deck, often the magnetic force caused the marine compass to point in only one direction. The method of swinging a ship was devised, in which the ship was constantly pointed a slightly new direction, along its course, while bearings were compared to stationary celestial bodies in determining the correct reading. The rectangular method of compensation was also developed, in which additional magnets were placed around the nautical compass to correct deviation. While a ship was headed due North, lead by an engineer’s marine compass, magnets were placed for and aft until the primary marine compass pointed North. Following this, the ship was lead due East while magnets were placed athwartship to create a solid Easterly bearing, then small iron spheres were slowly moved outwardly away from the compass as the ship was lead Northeast. Finally a vertical magnet was placed below the axis of these marine compasses to negate the affect of a ship’s roll, resulting in a compass that was as balanced as physically possible.