Submarine cable laying navigation system

Customer Background

A Chinese marine engineering company contracted for a submarine fiber optic cable project between Southeast Asian nations required high-precision navigation for their cable-laying vessel in open ocean areas with limited GPS coverage.

Challenges

• Remote offshore areas experience intermittent GPS signals, requiring high-precision INS for dead reckoning.
• Cable routes with bends and crossings demand precise vessel positioning and cable direction control.
• Marine environment requires salt-fog resistance, vibration immunity, and high reliability.

GyroSens Solution

• GyroSens equipped the vessel with the GSGYR312F three-axis fiber optic gyroscope (tactical grade):
• Triaxial integrated digital closed-loop design based on Sagnac effect.
• Bias stability <0.1°/h (10s smoothing), random walk <0.01°/√h.
• Dynamic range ±500°/s, bandwidth ≥200Hz, RS422 digital output.
• 3-second rapid startup with immediate operation.
• All-solid-state design with no rotating parts for high reliability and long MTBF.
• Operating temperature -45°C～+70°C, suitable for marine environments.

Results

The vessel maintained heading accuracy better than 0.2° even in GPS-challenged areas, successfully completing 300km of submarine cable laying with positioning error within design tolerances.

Recommended Product

GSGYR312F Three-Axis Fiber Optic Gyroscope (Standard Model)

Call to Action

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