Why it matters
Without a MOB system, the fleet risks delayed rescue, false alerts, incomplete logs, and misaligned drills, leading to charter disruptions and safety incidents when crews or guests fall overboard.
From design to safety
Design
AI MOB concept and data plan
Define sensor suite, data routing, and decision rules for MOB detection; establish alert hierarchies and recovery workflows; plan storage, version control, and simulation scenarios for validation.
- Pan-Tilt-Zoom Camera
- Thermal Imaging Camera
- Personal AIS Beacon
Build
System integration and validation
System integration validates hardware and links; install cameras, thermal units, beacons, and safety gear; configure data paths, set thresholds, and test alarm logic during sea trials and drills.
- Pan-Tilt-Zoom Camera
- Thermal Imaging Camera
- Personal AIS Beacon
- Life buoy with AIS
Operation
Live monitoring and automated alerts
Live AI ingests feeds, sequences events, and triggers MOB alert hierarchy; logs events with time stamps for captain review, drill readiness, and continuous improvement.
- Pan-Tilt-Zoom Camera
- Thermal Imaging Camera
- Personal AIS Beacon
Maintenance
Condition checks and calibration cycles
Condition checks and calibration cycles: calibrate cameras and beacons, verify battery health, update thresholds, and ensure recovery gear remains accessible, in date, and properly labeled for rapid deployment.
- Life buoy with AIS
- Throw bag
- Rescue ladder
Safety
Audit and regulatory sign-off
Document tests, confirm class and flag state compliance, and secure sign-off by the appointed surveyor and safety officer for MOB readiness and drill documentation.
- Throw bag
- Rescue ladder
- Life buoy with AIS
Part by part
- 1
Pan-Tilt-Zoom Camera
- Watch for
- Lens fogging, misalignment, power loss, occasional occlusion by deck structures
- AI action
- Detect human silhouettes, escalate if fall detected, alert bridge and MOB team via AIS-linked pager.
- 2
Thermal Imaging Camera
- Watch for
- Gain drift, thermal bloom, calibration drift, lens obstruction
- AI action
- Flag abnormal thermal signatures near waterline, alert crew and trigger beacon sweeps.
- 3
Personal AIS Beacon
- Watch for
- Beacon battery failure, signal timeout, improper pairing with ship AIS
- AI action
- Mark person on MOB map, broadcast rescue beacon ID to crew devices.
- 4
Life buoy with AIS
- Watch for
- TETHER snag, buoy leakage, AIS beacon non-response
- AI action
- Confirm MOB area coverage, ping rescue buoy, display nearest vessel entrapment risk.
- 5
Throw bag
- Watch for
- Line fraying, visibility of line, deployment obstruction
- AI action
- Verify deployment viability, guide crew to use toward caller location.
- 6
Rescue ladder
- Watch for
- Deployment latch corrosion, stowed position drift
- AI action
- Announce ladder readiness, prompt crew to deploy when MOB confirmed.
Worked example
MOB readiness drill on a 42 m motor yacht
Illustrative scenario with sample data.
During a safety drill, a crew member drops overboard amid heavy seas and low visibility; sensors must confirm a MOB event and guide recovery.
Signal in
time=14:08Z, cam2/ptz=active, therm=waterline hotspot(68C), beaconID=BO-4861, lifebuoyAIS=OK, throwbag=deployed, ladder=stowed, seaState=6, wind=14kn
System out
alert MOB; MOB map shows position; crew receives MOB alert; recovery team on standby; nearest tender notified; report auto-generated.
Human sign-off: Captain reviews the alert sequence, approves recovery actions, and signs the drill report.
How to roll it out
Phase 1
Weeks 1 to 4
Baseline sensor placement and data routing are established; initial MOB test drills conducted.
Phase 2
Weeks 5 to 8
Threshold tuning and alert hierarchies validated during sea trials and crew drills.
Phase 3
Weeks 9 to 12
Operational readiness confirmed; full MOB drill licensing and documentation completed.
Where people stay in charge
- Decisions on MOB alerts must be approved by the captain or designated safety officer with input from the class society.
- All data storage and logs must be verifiable for class surveys and flag-state audits.
- Final go/no-go on activation of automated recovery actions rests with the master or chief engineer.
Questions owners and crews ask
What sensors are needed for MOB detection on a yacht?
A MOB system combines cameras, thermal imaging, personal AIS beacons, and recovery equipment status to provide a unified alert and response workflow, with calibrated thresholds and logs for auditability.
Who approves MOB system deployments on a ship?
The captain, chief engineer, and safety officer coordinate with the yard and class to approve the deployment and sign off on the safety case, ensuring regulatory compliance.
How does the AI handle false positives during drills?
Thresholds and alert rules are tuned to minimize false positives; events are logged for crew review and adjustment during drills, with periodic recalibration after incidents.
What records are produced for inspections and surveys?
Maintenance logs, calibration certificates, drill results, and MOB incident reports are archived for class and flag-state audits, with chain-of-custody for evidence.
Sources and further reading
- US Coast Guard Boating SafetyRecreational boating safety equipment requirements and recall notices for life-saving gear and alerts.
- Royal Institution of Naval ArchitectsNaval architecture and yacht design research covering stability, layout, and safety engineering.
- Lloyd's RegisterYacht classification plan approval and surveys that define class requirements for safety systems.
- UK Maritime and Coastguard AgencyUK flag state yacht codes, surveys, and seafarer certification relevant to audit evidence.
- Red Ensign GroupRed Ensign yacht code requirements explaining what UK flag state compliance demands of yachts.
- Society of Accredited Marine SurveyorsAccredited marine surveyors covering pre-purchase and condition surveys and survey standards.
- YACHT: Sailing KnowledgeSeamanship and weather guidance for handling rough conditions and keeping crew safe at sea.
- SuperyachtNews: OperationsSuperyacht operations coverage of safety reports, compliance, and crew drill practice.
- IMO: ISM CodeISM Code safety management requirements for ships and large yachts, including drill records.
- International Maritime Organization (IMO)IMO safety and pollution regulation overview for ships and yachts worldwide.