Maritime English
Maneuvering

What is Interaction Zone Warning?

Interaction Zone Warning Advisory issued when proximity of shallow banks or passing vessels may cause hydrodynamic interaction affecting steering and under-keel clearance.

Source: IMO SMCP, STCW Convention, SOLAS, COLREG

How is “Interaction Zone Warning” Used in Practice?

VTS: Interaction zone warning, northbound tanker approaching your port bow at one cable distance, expect suction effect.

Certification Exam Relevance

STCWMarlins TestISF WatchkeeperGMDSS

Who Needs to Know This Term?

  • Deck Officers
  • Engine Officers
  • Masters

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Frequently Asked Questions

What is Interaction Zone Warning?

Advisory issued when proximity of shallow banks or passing vessels may cause hydrodynamic interaction affecting steering and under-keel clearance.

Where can I learn this term for free?

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