🔍 Key Concepts

• Safe working load (SWL) vs. breaking strength of mooring lines • Purpose of a mechanical brake on a mooring winch during normal operations and emergencies • Difference between maximum expected working tension and design safety margins

💭 Think About

• Ask yourself: Is a brake normally designed to match the absolute breaking point of the line, or to safely control it in realistic operating conditions with a safety margin? • Which option best reflects a realistic, conservative safety design: tied to breaking strength, working tension, or a percentage above/below working tension? • Consider what would happen operationally if the brake held right up to the line’s breaking strength—would that be safe for the crew and fittings?

✅ Before You Answer

• Distinguish between breaking strength (when the line parts) and safe working tension (normal use limit). • Think about standard safety practice: brakes and gear are often rated relative to working load, not ultimate breaking strength. • Verify which option reflects a brake designed to prevent dangerous overload while still allowing the line to render before structural failure.