🔍 Key Concepts
• Breast lines vs. spring lines vs. bow/stern lines and how each controls different vessel movement at the dock
• How a vessel moves (in/out from dock vs. ahead/astern) when different lines are tensioned
• Typical mooring arrangement names: breast, spring, bow, and stern lines
💭 Think About
• Think about which line(s) primarily prevent the vessel from moving directly away from or toward the dock, rather than forward or backward along the dock
• Visualize the vessel lying alongside a pier: which lines run roughly at a right angle to the dock, and which run more fore‑and‑aft?
• Ask yourself: if only this type of line remained, would the ship mostly stay pressed in toward the pier, or could it easily drift away from it?
✅ Before You Answer
• Identify which option’s line(s) run most nearly perpendicular to the pier in normal practice
• Confirm which types of lines are primarily to control fore‑and‑aft movement (surging) instead of in‑and‑out movement
• Make sure you can explain, in your own words, what each named line (bow, stern, spring, breast) is intended to control before choosing