🔍 Key Concepts

• Definition of a power-driven vessel vs. a sailing vessel when an engine is in use (Navigation Rules, Rule 3 and Rule 25) • Required lights and shapes for sailing vessels and for vessels under power (Navigation Rules, Part C) • Sound signals in restricted visibility for vessels underway (Navigation Rules, Rule 35)

💭 Think About

• When a sailboat has its engine running and propeller engaged, how is it classified under the Rules: as a sailing vessel or a power-driven vessel? • Which signals (lights, shapes, and sound signals) apply specifically to a vessel that is considered power-driven and which apply only to a vessel considered sailing? • Look at each option: which one describes a requirement for a vessel that is truly operating as a sailing vessel only, and which describes one for a power-driven vessel?

✅ Before You Answer

• Verify how the Rules define a power-driven vessel when the engine is in use, even if sails are set. • Check what day shape (if any) is required for a power-driven vessel that also has sails set. • Confirm what sound signal in fog is required for a vessel underway making way that is classified as power-driven, and whether prolonged vs. short blasts apply.