A method for calibrating the accuracy of a ship's compass bearing in a dock
By using a gyro theodolite to automatically find north in the dock and combining it with calibration points and scales, the problem of compass accuracy calibration during the shipbuilding period was solved. This achieved high-precision, low-cost compass calibration, ensuring the accuracy requirements of ship navigation performance and shortening the construction and commissioning cycle.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CSSC HUANGPU WENCHONG SHIPBUILDING CO LTD
- Filing Date
- 2026-05-22
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technologies make it difficult to calibrate compasses with high precision during the shipbuilding period in dry dock, and existing methods rely on field conditions, are complex to operate, and have unstable accuracy.
The true north reference is obtained by automatically finding north using a gyro theodolite, and parallel calibration points and scales are set on the ship's deck. The true bow azimuth is obtained by rotating 180° and verifying the double-end symmetry, and deviation compensation and correction are performed.
It enables high-precision, low-cost compass calibration during the ship's dock construction period, ensuring the compass's accuracy requirements in the ship's navigation performance, shortening the construction and commissioning cycle, and possessing an inherent self-verification mechanism to avoid the influence of field conditions.
Smart Images
Figure CN122408831A_ABST