Core Eggs In Depth: Rule 7 - Risk of Collision

Introduction

• Focus on Rule 7 of the maritime collision regulations.
• Discusses the determination of risk of collision.

Rule 7 Overview

Rule Definition

• Every vessel must use all available means appropriate to determine if risk of collision exists.
• If there's any doubt, risk is deemed to exist.

Connection to Rule 5

• Echoes Rule 5, which emphasizes the need to keep a proper lookout.

Key Elements of Rule 7

Proper Use of Radar

• Utilize radar if fitted and operational.
• Importance of long-range scanning for early warning of collision risks.
• Systematic observation through radar plotting or visual plotting.
  • Radar Plotting: Take series of plots to assess risk over time.
  • Visual Plotting: Series of compass bearings should be taken systematically.

Avoiding Assumptions

• Do not make assumptions on scanty or incomplete information.
• Needs a complete picture to determine risk of collision.

Considerations for Risk of Collision

Key Indicators

• Risk is deemed to exist if:
  • The compass bearing of an approaching vessel does not appreciably change.
  • Must monitor the difference between the own heading and the approaching vessel's bearing.

Additional Scenarios

• Large Vessels:

  • Risk may still exist even when there is an appreciable change in bearing.
  • Focus on a specific part of the large vessel (e.g., bow) for accurate bearing assessment.

• Tugs and Tow:

  • Similar to large vessels, the bearing may change, but risk can still exist if approaching a long tow.

Conclusion

• Importance of systematic observation in determining risk of collision.
• Highlighted that risk may exist even with changing bearings in certain situations.
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