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The CPT‑130M (similar model in the CPT‑130 series of marine compasses) refers to a table‑mounted liquid magnetic compass designed for marine navigation. It’s built to provide reliable directional information on board vessels and meets marine magnetic compass standards
Simple and durable construction — reliable for long‑term marine use.
Accurate reading: Compass card graduated from 0° to 360° with 1° intervals.
Stable performance: Designed to maintain accuracy under marine conditions and allow correction of magnetic deviation.
Liquid‑filled design: Helps damp the motion of the compass card so it stabilizes quickly.
Card Diameter: ≈130 mm (the number 130 refers to this card size).
Indicating Deviation: ≤1.5° (typical accuracy range under standard magnetic conditions).
Operating Temperature: Roughly –25 °C to +60 °C (varies slightly by exact version).
Stabilization (Half‑Period): ≥5.59 s — how quickly the needle settles after movement.
Power Supply (for illumination): Often DC 24 V for lighting the compass card.
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