🔍 Key Concepts

• Rule 34 – Maneuvering and Warning Signals (vessels IN SIGHT of one another) • Rule 35 – Sound Signals in Restricted Visibility • Which specific sound patterns are used as fog signals versus maneuvering signals

💭 Think About

• Identify which of the listed signals are clearly described in Rule 35 (restricted visibility) and eliminate those choices. • Check Rule 34 to see which signal is defined only as a maneuvering signal when vessels are in sight of one another. • Ask yourself: which of these signals would you expect to hear in fog, and which is used to indicate an alteration of course or other maneuver to another vessel you can actually see?

✅ Before You Answer

• Carefully verify in the Navigation Rules that a prolonged blast is associated with fog/restricted visibility situations. • Check whether four short blasts appear as a special identity signal in restricted visibility for certain vessels (e.g., pilot vessels). • Confirm which option is defined solely under Rule 34 (in-sight maneuvering) and does NOT appear in Rule 35 (fog signals).