Helicopter operations aboard ship — whether a full landing on a helideck or winching personnel and cargo without the helicopter actually landing — require rigorous safety procedures given genuinely serious hazards specific to combining an aircraft with a moving vessel at sea.
Landing vs Winching Operations
- Landing operations — the helicopter fully lands on a dedicated helideck, common on larger vessels equipped for this, or in medical evacuation and pilot transfer scenarios where a helideck is available
- Winching operations — the helicopter hovers over the vessel without landing, lowering or raising personnel and cargo via winch cable, common on vessels without a helideck, or for at-sea medical evacuations
Real Hazards Specific to Helicopter Operations
- Rotor wash — the powerful downdraft from rotor blades can genuinely dislodge loose items on deck, creating a real hazard to personnel and equipment; deck areas are cleared and secured before any helicopter approach
- Static electricity — a helicopter builds up static charge during flight; the winch cable or hook must be allowed to touch the deck (grounding the charge) before being handled, since touching an ungrounded cable can deliver a genuine electric shock
- Deck movement — a rolling or pitching vessel presents real challenges for both landing and winching, factored into weather limits for conducting operations at all
Ship-Side Coordination: The Helicopter Landing Officer
A designated Helicopter Landing Officer (HLO) coordinates the ship’s side of the operation — deck preparation, communication with the aircraft, and directing deck personnel — but critically, the pilot retains full authority and final decision-making over the aircraft itself at all times. The HLO manages the ship’s environment; they don’t command the helicopter.
Fire Fighting Readiness
Given the genuine fire risk any aircraft operation carries, fire fighting equipment and trained personnel are positioned and ready during any helicopter operation — a real, mandatory precaution, not routine deck activity.
Weather Limits
Helicopter operations have defined weather limits (wind speed, vessel motion) beyond which operations are suspended — a genuine, non-negotiable safety threshold, since conducting operations beyond safe limits risks the aircraft, crew, and vessel.
Exam Relevance
Helicopter operation types, static electricity hazards, and the HLO’s role and limits are core Ship Knowledge and Safety topics in deck officer competency exams, particularly relevant for vessels regularly conducting such operations.