BOTH INTERNATIONAL & INLAND When action to avoid a close quarters situation is taken, a course change alone may be the most effective action provided that __________.

Correct Answer: Option A — it is a large course change

Under Inland Navigation Rules, for the condition where 'When action to avoid a close quarters situation is taken, a course change alone may be the most effective action provided that', the correct requirement is: 'it is a large course change'. This standard ensures clear navigational intent and collision avoidance.