🚢 Maritime Intercept Course Calculator

Calculate the optimal course and time required to intercept a moving target. Essential for search and rescue operations, vessel rendezvous, and tactical maritime navigation.

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Own Ship Parameters

Target Vessel Parameters

Enter course/speed and press Calculate

The interception vector will appear here

Results are for reference only. Please double-check the answers.COLREGs Rule 7 Compliant Math

⚙️ How to Use

Step 1: Input Speed

  • Enter your Own Ship Speed in knots.
  • Ensure your speed exceeds the target's relative speed for a cross.

Step 2: Target Data

  • Input the target's Course and Speed.
  • Add the Bearing and Distance from your current position.

Step 3: Analyze

  • Review the Course to Steer and Time to Intercept.
  • Confirm the vectors using the Interactive Diagram.

Navigation Tip: Intercept is based on a constant bearing. If the relative bearing remains unchanged, you will intercept or collide.

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Navigation Standards

Calculations follow COLREGs Rule 7 (Risk of Collision) based on relative bearing analysis and mathematical sine rule.

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Optimal course generation assumes constant target speed and the shortest path interception vector.

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Real-time SVG visualization of relative motion vectors for enhanced situational awareness.

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