Why it matters
Without this capability, unplanned haul-outs, missed drydock slots, conflicting yard dates, and incomplete records lead to costly delays and safety issues.
From design to safety
Design
AI assists initial haul-out scoping
AI ingests hull form data, underwater body geometry, ballast constraints, and project constraints to propose the optimal travel lift clearance, blocking strategy, drydock window, and tide considerations for lift angles.
- travel lift
- blocking chock
- sea chest
Build
Plan-execution during build phase
AI rehearses cradle-to-crane sequences using 3D models, fixture tolerances, yard slot patterns, and temporary supports to validate the blocking and lifting plan before concrete work, including sequence validation at lift points.
- blocking chock
- keel block
- hull inspection hatch
Operation
Ongoing docking readiness monitoring
AI tracks voyage cycles, drydock calendars, hull cleanliness sensors, and sea chest water flow to forecast upcoming haul-outs and flag deviations in the schedule.
- travel lift
- sea chest
- stern gland
Maintenance
Maintenance-driven drydock optimization
AI cross-checks PMS records, painting intervals, thickness readings, and cathodic protection data to adjust timing and scope of hull treatments and inspections.
- hull inspection hatch
- keel block
- sea chest
Safety
Safety-compliant dock procedures
AI confirms that all records satisfy class, flag, and regulatory requirements before approval of lift plans, dock entries, and crew safety checks.
- travel lift
- blocking chock
- stern gland
Part by part
- 1
travel lift
- Watch for
- slings and lifting hardware wear, misalignment, or contact marks during lift cycles.
- AI action
- reads load sensors and slippage data; flags potential sling failure and triggers verification by supervisor.
- 2
blocking chock
- Watch for
- crack propagation or deformations in chocks, misalignment with hull flats.
- AI action
- analyzes contact pressure data and proposes re-seating or replacement events.
- 3
sea chest
- Watch for
- surface corrosion, blockage, or valve sticking affecting cooling water intake.
- AI action
- monitors flow metrics and valve positions; prompts inspection crew and PMS entry.
- 4
hull inspection hatch
- Watch for
- corrosion around hatch frame, gasket degradation, or seepage around hatch.
- AI action
- integrates inspection notes with ASV records; triggers targeted NDT or repainting task.
- 5
stern gland
- Watch for
- lubricant leakage, shaft play, or bearing wear at seal interfaces.
- AI action
- reads bearing temperature and vibration data; issues maintenance work order if thresholds breach.
- 6
keel block
- Watch for
- settling, uneven load distribution, or block deformation during dock operations.
- AI action
- compares measured deflections to model; suggests re-positioning or additional blocks.
Worked example
Catching a hull blockage before a scheduled drydock
Illustrative scenario with sample data.
A 26m motor yacht requires a pre-drydock hull survey and lift-plan validation with environmental and yard-slot constraints to ensure safe hoisting and access.
Signal in
waterline data, hull thickness x-ray readings, sea chest flow rate, travel lift load sensor, blocking plan STL v2, dockyard calendar, tide windows, crane capacity, weather forecast, crew availability, PMS records, previous haul-out results, flag state requirements.
System out
alert: potential hull blockage detected in sea chest intake; work order generated for inspection and flow recalibration; revised blocking plan proposed; dock slot retained; lift team notified; safety brief updated.
Human sign-off: Chief engineer reviews the alert, confirms inspection scope, approves the revised blocking plan, and signs the updated dock-entry checklist; Class surveyor reviews the new plan for compliance and issues formal feedback.
How to roll it out
Phase 1
Weeks 1 to 4: Baseline
Establish data feeds, map yard slots, calibrate sensor thresholds, and validate against standard hull survey templates and class requirements.
Phase 2
Weeks 5 to 8: Pilot
Run drydock readiness models on a real rigging scenario, verify AI alerts, and adjust human approval workflows with a test charter crew.
Phase 3
Weeks 9 to 12: Scale
Integrate with PMS, class, and flag documentation; deploy across multiple yachts in the fleet, with yard-wide process alignment.
Where people stay in charge
- All class, flag state, and regulatory decisions must be sign-offed by the chief engineer or class surveyor before executing dock-related actions.
- Each lifting or blocking decision requires a qualified supervisor’s confirmation and record of approval in the docking log.
- No automated removal of critical hull components without an inspection-led human decision.
Questions owners and crews ask
What data should I feed AI for drydock planning?
Feed hull form data, sea chest flow readings, lift sensor data, blocking configurations, and the master drydock calendar; ensure records cover PMS, surveys, and previous haul-out results, plus yard slot history and tide models.
How does AI handle scheduling conflicts at the yard?
AI compares dock availability, travel lift capacity, crew shifts, weather windows, and yard constraints; it proposes alternative slots and generates notifications for stakeholders, with escalation paths to the yard manager.
Who approves the lift plan changes?
The chief engineer or class surveyor approves lift plan changes, ensuring compliance with regulatory and class requirements, and signs the updated lifting plan.
What records are generated for audits?
Working logs, lift/load sensor traces, blocking configurations, hull survey findings, class documentation, and dock-entry approvals are archived for audits and regulatory review.
Sources and further reading
- Lloyd's RegisterYacht classification, plan approval, and survey requirements explained for owners and surveyors.
- RINA ClassificationYacht classification and inspection rules that govern hull survey findings and records.
- IMO: ISM CodeSafety management system requirements for ships and large yachts, including records and audit trails.
- UK Maritime and Coastguard AgencyUK flag state yacht codes, surveys, and seafarer certification requirements explained for yacht operators.
- Dockwalk: EngineersYacht engineers and maintenance practice, including dock-entry checklists and engine room routines.
- SuperyachtNews: OperationsSuperyacht operations, yard scheduling, safety reports, and compliance practice for refit periods.
- Professional BoatBuilder: RefitRefit planning and repowering guidance, including blocking and lifting considerations for yard projects.
- Bureau Veritas Marine and OffshoreYacht classification rules, surveys, and inspection requirements for surveyors reviewing plans.
- UKHO ADMIRALTYTide tables and nautical charts used to plan lift angles and dock entry timing.