🔍 Key Concepts

• International Rules (COLREGS) Rule 3 – Definitions, especially the definition of a vessel "constrained by her draught" • The difference between vessel not under command (NUC), vessel restricted in her ability to maneuver (RAM), and constrained by her draught • Which types of vessels the Rules say can or cannot be considered "constrained by her draught"

💭 Think About

• Ask yourself: According to the International Rules definition, is "constrained by her draught" about the vessel’s work or equipment, or about her ability to safely deviate from her course because of the depth/width of water? • Consider each choice: Which ones describe other special conditions (like NUC or RAM) rather than the specific, defined term "constrained by her draught"? • Think: Does the definition limit this status to a particular mode of propulsion, or could any vessel qualify? What do the Rules actually say?

✅ Before You Answer

• Look up the exact wording of Rule 3(h) – vessel constrained by her draught in the International Regulations • Confirm which status applies to a vessel that through exceptional draught in relation to the available depth and width of navigable water is severely restricted in her ability to deviate from her course • Verify whether the Rules say a vessel "constrained by her draught" must be a certain type of vessel (e.g., power-driven only) or engaged in a particular type of work (e.g., towing, dredging, etc.)