The helicopter deck on an offshore drilling unit is required to be fitted with perimeter lights in alternating colors of __________.
• Offshore drilling unit helicopter deck lighting requirements in 46 CFR (MODU regulations) • Purpose of perimeter (deck edge) lights for helicopters at night or in low visibility • Typical aviation safety color conventions: what different colors usually indicate (e.g., caution, obstruction, safe landing area)
• Think about which two colors are most commonly used in both marine and aviation contexts to mark safe operating areas and boundaries rather than hazards only. • Ask yourself: which color pair would give high contrast and good visibility from the air at night without being confused with emergency or obstruction-only lighting? • Consider which color combination is most consistent with standard helicopter landing pad markings you may have seen on offshore platforms, ships, or hospital roofs.
• Verify in the relevant 46 CFR part for MODUs and helicopter facilities what colors are specified for deck perimeter lights. • Check which of the listed colors are typically associated with hazard/obstruction versus guidance/operational boundaries in both maritime and aviation lighting. • Confirm that the chosen color pair would be clearly distinguishable from navigation lights and from emergency signal lights to avoid confusion.
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