BOTH INTERNATIONAL & INLAND The vessel...

🔍 Key Concepts

• Review Navigation Rules, Rule 27 – Vessels Not Under Command or Restricted in Their Ability to Maneuver and focus on the required day shapes. • Compare the day shapes for towing over 200 meters (Rule 24), fishing/trawling (Rule 26), and mine clearance (Rule 27(f)). • Pay attention to the specific combination ball – diamond – ball and how additional balls or diamonds indicate the safe side vs. obstructed side of a vessel doing underwater work.

💭 Think About

• First, identify the basic vertical shape pattern shown on the right side of the illustration: what does a ball over a diamond over a ball normally indicate? • Then look at the shape on the left side: is a single diamond used for long tows, for fishing gear, or for marking the safe side of an obstruction? • Match each multiple‑choice option with the correct day shape in the Rules, and eliminate any option whose shape clearly does not include ball–diamond–ball.

✅ Before You Answer

• Verify in the Rules which vessel displays ball – diamond – ball by day. • Check which situation uses a single diamond to mark the side where other vessels may pass vs. the side that is obstructed. • Confirm that day shapes for trawlers/fishing with extended gear and for mine clearance look different from the pattern shown in the illustration.

BOTH INTERNATIONAL & INLAND The vessel showing the shape in illustration D022RR below is which of the following?

A trawler shooting nets in the direction indicated

A tug with a tow exceeding 200 meters unable to deviate from course

A vessel engaged in mine clearance operations

A fishing vessel with gear extending more than 150 meters horizontally

🔍 Key Concepts

💭 Think About

✅ Before You Answer