Emergency Preparedness — Mindset and Planning
Emergencies don't wait for convenient moments. Preparation is what you do before you need it.
The Prepared Crew
The majority of serious offshore accidents follow what safety researchers call the Swiss cheese model — a sequence of small failures, each individually survivable, that happen to line up at once. No single hole sinks the boat; it's the alignment of holes across multiple layers of defence. Remove one layer of failure, and the cascade stops. Preparation is how you add layers of defence.
Before any offshore passage, the skipper must know every crew member's actual abilities — not what they claim, not what they did ten years ago. Can they reef in the dark? Can they hold a course on instruments? Can they manage the boat alone for ten minutes while you deal with a problem below? Honest crew assessment is not an insult to anyone; it's the foundation of task assignment when things go wrong.
Emergency roles must be assigned before departure, not during the emergency. Who calls MAYDAY? Who deploys the life raft? Who handles the helm while the MOB recovery is underway? Who operates the bilge pump? Assign those roles, talk through them at the dock, and make sure every person can physically reach the equipment they're responsible for.
The skipper's primary safety responsibility is preparation. Seamanship skill matters — but a skilled skipper who hasn't briefed the crew, hasn't checked the flares, and hasn't filed a float plan is a liability. Preparation is not paperwork. It is the difference between a manageable emergency and a fatal one.
Run a 'what if' scenario at the dock before every offshore passage. Pick an emergency — fire, MOB, flooding — and walk the crew through their roles step by step. Five minutes at the dock is worth an hour of confusion at sea.
Never assume crew have been on a safety briefing before. Even experienced sailors may not know where your specific boat's flares are stored, how your EPIRB activates, or what your MOB procedure looks like. Brief every crew member, every passage.
The 'Swiss cheese model' of accident causation describes accidents as:
Float Plans
A float plan is the document that tells someone ashore where you left from, where you're going, when to expect you, and who to call if you don't show up. It costs nothing and has saved lives. Not filing one is not seamanship — it's optimism with consequences.
A complete float plan includes: departure point and time, destination and expected arrival time, route if a specific one is planned, vessel name, type, colour, length, and registration number, MMSI and EPIRB registration number, names and emergency contact details of all crew, and a description of safety equipment aboard (number of life jackets, flares, raft). The more detail, the faster a search can be targeted if needed.
Leave the float plan with a responsible person ashore — not someone who will forget to check, not an email that might go unread. Marinas can hold float plans. The US Coast Guard provides CG Form 3029 (the official float plan form) as a free download. Some cruising clubs and yacht clubs maintain a float plan service. Use it.
Tell your contact what to do and when: if you have not called by [time], call the Coast Guard or local maritime authority. Give them the MMSI number and EPIRB ID so searchers can correlate any distress signal immediately with your vessel. If you alter your plans mid-voyage — change of destination, extended stop — update the float plan. A float plan for a route you're no longer taking delays search and rescue.
The USCG float plan form (CG-3029) is available free at uscgboating.org. Print several copies, keep one aboard, and give one to your shore contact before every offshore passage.
Why should a float plan include your vessel's MMSI and EPIRB registration number?
Pre-Departure Safety Checks
A pre-departure safety check is not a bureaucratic exercise. It is the last opportunity to find a problem before you're offshore. Do it every time, without exception. The check that feels pointless is the one that will eventually find the expired flare, the dead battery, or the disconnected bilge pump float switch.
The check should cover, at minimum: VHF radio — transmit and receive on Channel 16, confirm DSC is connected to GPS; flares — check expiry dates, know how many you have and where they are; EPIRB — confirm registration is current, test self-test function, confirm HRU is in date if deck-mounted; life jackets — correct count for crew, correct sizes, inflator bladders seated correctly, crotch straps present; bilge pumps — manual pump operational and located, electric pump switches tested, float switch operational; fire extinguishers — pressure in the green, pin and seal intact, accessible.
Jacklines and tethers must be inspected before each offshore passage, not once a season. Check jackline attachment points for corrosion, check webbing for UV degradation or chafe, check tether hooks for positive locking. A tether that unclips under shock load is not a tether.
Walk through the MOB drill concept with crew at the dock. Identify the MOB pole location, the throwing horseshoe, the MOB button on the chartplotter. Everyone aboard should be able to initiate an MOB recovery — not just the skipper.
Keep a written pre-departure checklist aboard and tick it off every time. Memory is unreliable under the pre-departure rush. A laminated checklist on the chart table takes 90 seconds to complete and ensures nothing is skipped.
Flares expire. In the US, SOLAS-approved flares are typically valid for 42 months from manufacture date. Carry current flares — expired flares may not function, and carrying them does not meet the legal carriage requirement in many jurisdictions.
During a pre-departure check, you find your EPIRB's self-test passes but the HRU shows an expiry date from 18 months ago. What should you do?
The Safety Briefing
The safety briefing is not optional, not embarrassing, and not something to rush through once you're already offshore. Deliver it at the dock, with everyone paying attention, before the lines are cast off. Every person aboard must know the following before the boat leaves the slip.
Life jacket locations and donning: where they are stowed, how to put one on, how to activate the inflation. If you carry inflatable life jackets, demonstrate the manual inflation procedure — because automatic inflation requires water immersion, which may not be immediate. Harness attachment points and when tethers are required (your boat's specific rule — some skippers require tethers at night or in any conditions above 20 knots; state your rule clearly).
Man overboard procedure: who shouts 'MOB', who presses the MOB button, who keeps eyes on the person in the water (the spotter does not stop watching, no matter what). Walk through the recovery method you'll use on your boat — the skipper's preferred MOB approach. Every crew member should know what the boat will do and what their role is.
MAYDAY call procedure: where Channel 16 is, how to key the mic, the words of the call. EPIRB location and activation: physically point to it, explain manual activation, explain what happens after. Fire extinguisher locations: point to each one. How to stop the engine: show the kill switch and the key. 'Abandon ship' signal and kit: what signal the skipper will give, where the abandon-ship bag is, what goes in the life raft — and what doesn't. The briefing should take five to ten minutes. It is the best ten minutes you will spend on that boat.
Post a laminated card at the helm and below decks with the MAYDAY call format, the vessel MMSI, and the EPIRB registration number. Under stress, people forget. The card doesn't.
During an MOB situation, what is the designated spotter's only job?
Summary
Most offshore accidents follow the Swiss cheese model — cascading small failures, not single catastrophic events. Preparation removes layers of failure.
Every crew member must know their emergency role before departure. Assign roles at the dock, not during the emergency.
A float plan must include vessel details, MMSI, EPIRB registration, crew names, and a clear trigger instruction for your shore contact.
Pre-departure checks must cover VHF, flares, EPIRB, life jackets, bilge pumps, fire extinguishers, jacklines, and tethers — every passage, without exception.
The safety briefing covers life jacket locations, MOB procedure, MAYDAY call, EPIRB activation, fire extinguishers, engine stop, and abandon-ship protocol. Deliver it at the dock before departure.
Preparation is the skipper's primary safety responsibility. Seamanship skill is secondary to having prepared the crew and the vessel.
Key Terms
- Swiss Cheese Model
- A model of accident causation that describes how accidents occur when multiple small failures align simultaneously, each defeating one layer of defence. Used in aviation and maritime safety.
- Float Plan
- A document left with a responsible person ashore that records departure details, destination, expected arrival, vessel description, MMSI, EPIRB ID, and crew information — used to initiate search and rescue if the vessel fails to arrive.
- MMSI
- Maritime Mobile Service Identity — a unique nine-digit number assigned to a vessel's DSC-equipped VHF radio and registered with maritime authorities. Used to identify a vessel in distress calls and DSC transmissions.
- HRU
- Hydrostatic Release Unit — a pressure-sensitive device that automatically releases an EPIRB or life raft from its mounting cradle if submerged to approximately 4 metres depth. Must be replaced before its stamped expiry date.
- EPIRB
- Emergency Position Indicating Radio Beacon — a 406 MHz distress beacon registered to a vessel that, when activated, transmits a coded signal via satellite to a rescue coordination centre.
- MOB
- Man Overboard — the emergency situation in which a crew member has entered the water unintentionally. MOB procedure involves immediate position marking, maintaining visual contact, and executing a recovery manoeuvre.
- Jackline
- A line or webbing strap rigged fore and aft on deck to which crew members clip their safety tethers, allowing them to move along the deck while remaining attached to the vessel.
- DSC
- Digital Selective Calling — a feature of VHF marine radios that allows a vessel to send a formatted digital distress signal including MMSI, GPS position, and distress nature with a single button press.
Emergency Preparedness — Mindset and Planning
According to the Swiss cheese model, what is the primary cause of most serious offshore accidents?
When is the correct time to assign emergency roles to crew members?
A float plan is most useful when it includes which of the following?
During a pre-departure safety check, you notice the automatic inflator on one life jacket has a green indicator but the crotch strap is missing. What is the correct action?
What is the designated spotter's role during a man overboard situation?
References & Resources
Related Links
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USCG Float Plan (CG-3029)
Official US Coast Guard float plan form and instructions. Free to download and use.
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US Coast Guard Boating Safety
Safety equipment requirements, regulations, and pre-departure checklist resources for US recreational boaters.
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BoatUS Foundation — Safety Briefing Guide
Practical guidance on crew safety briefings, pre-departure checklists, and offshore preparedness.
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RYA Safety Briefing Recommendations
Royal Yachting Association guidance on skipper responsibilities, safety briefings, and crew preparation.