🔍 Key Concepts

• IALA Region B lateral system used in the U.S. • The memory aid "red right returning" – what it tells you about color AND numbering when entering from seaward • Difference between daymark shape (on a piling/dayboard) and buoy shape/light characteristics

💭 Think About

• When you are coming in from the sea, what color and numbering are on your starboard side? Are those numbers odd or even? • Does a starboard mark have to show a fixed red light, or can it have different red light characteristics (flashing, occulting, etc.)? • Which shapes (square vs. triangle) are normally associated with port vs. starboard daymarks in the U.S. lateral system?

✅ Before You Answer

• Verify which side (port or starboard) uses even numbers when returning from sea under the U.S. IALA-B system. • Check whether Morse (A) white light is associated with starboard lateral marks or with a different type of aid (e.g., safe water mark). • Confirm which side (port or starboard) uses square dayboards versus triangular dayboards in U.S. practice.