🔍 Key Concepts
• Rule 1 & 3, COLREGS/Navigation Rules – definitions of special types of craft (seaplane, air-cushion vessel, submarine, WIG)
• Lights and Shapes for special vessels in Part C of the Navigation Rules (International & Inland)
• The phrase “high-intensity all-round flashing red light” and which specific craft is assigned that light
💭 Think About
• Look up each of the four vessel types in the Navigation Rules and see which one has a unique requirement for a high-intensity all-round flashing red light
• Think about which of these craft is most likely to need a very conspicuous warning light when operating close to the surface among other vessels
• Ask yourself: is this light shown continuously whenever in that operating mode, or only during specific operations like landing/taking off or surfacing?
✅ Before You Answer
• Verify in the Navigation Rules, Part C – Lights and Shapes, the exact wording for any vessel showing a high-intensity all-round flashing red light
• Confirm which of the listed craft has a special provision separate from the standard masthead, sidelights, sternlight pattern
• Be sure the light described is red, all-round, flashing, high-intensity (not white, not yellow, not just a normal navigation or anti-collision light)