🔍 Key Concepts

• Light characteristics used on navigation lights (flashing, occulting, isophase, Morse) • A Morse light combines short and long flashes to form a repeated Morse letter (e.g., dot-dot-dash) • In the diagrams, different shapes/lengths represent different durations of light or dark

💭 Think About

• Which option shows a repeating pattern made up of two different flash lengths rather than all flashes being the same? • Which patterns could instead represent simple flashing, occulting, or isophase lights with equal on-times? • Look closely: where do you see a clear short-short-long or short-long type sequence repeating across the strip?

✅ Before You Answer

• Verify that a Morse light must contain at least two different durations of light, forming a Morse letter. • Confirm that the chosen pattern is not just equal flashes separated by equal periods of darkness (that would be a simple flashing or isophase light). • Make sure the pattern you pick repeats the same short/long sequence along the whole length, as a Morse character would.