Which weather information should be reviewed before departure?

• A. Forecasts for wind, currents, and tides only.
• B. Rainfall probability and air temperature.
• C. Forecasts for wind, waves, visibility, currents, tides, and thunderstorm risk.
• D. Cloud cover and UV index.

Answer: (C)

The key idea is that safe departure depends on checking a full range of weather conditions that can impact handling, navigation, and safety at sea. The best choice is the one that includes forecasts for wind, waves, visibility, currents, tides, and thunderstorm risk. Each element affects different parts of the operation: wind determines vessel control and planning for fuel or power usage; waves influence stability, ride quality, and potential hull or equipment stress; visibility sets how far you can see hazards and other vessels; currents and tides change speed, course accuracy, and the risk of grounding or drift; thunderstorm risk signals the chance of lightning, gusty winds, heavy rain, and rapid weather changes that might require delaying, rerouting, or altering plans. Other options miss one or more critical factors—focusing only on wind, currents, and tides omits waves, visibility, and storm risk; rainfall probability with air temperature neglects sea-state and hazard visibility; cloud cover and UV index don’t address the operational dangers essential for safe departure.