🔍 Key Concepts

• SOLAS liferaft required equipment for ocean service (pyrotechnic signals, markers, lights) • Best night-time visibility to aircraft from above the sea surface • Difference between day signals vs night signals (smoke, dye, lights, flares)

💭 Think About

• Which of these signals can be seen most clearly from an aircraft after dark, when colors on the water are hard to distinguish? • Think about which items are mainly intended for daylight use to mark position on the sea surface rather than shine upward. • Consider which device produces a bright light or flame with elevation, making it easier for aircraft to see at night.

✅ Before You Answer

• Identify which options are primarily daylight-only distress signals (smoke, dye). • Determine which option is specifically listed in SOLAS liferaft equipment for ocean service as a night distress signal. • Ask yourself: Which of these would create a strong, visible signal upward into the sky for aircraft at night?