Hatch Cover Ultrasonic Tightness, Seal Repair & Wet-Cargo Claim Exposure Tool

Open Hatch Value • Ultrasonic Leak Mapping • Gasket Compression • Cleats & Drains • Repair / Retest • Wet-Cargo Exposure

Hatch Cover Ultrasonic Tightness, Seal Repair & Wet-Cargo Claim Exposure Tool

Turn hatch-cover ultrasonic readings into a tighter owner/operator decision. Screen the worst reading against the accepted test threshold, quantify affected sealing perimeter, check gasket compression, map leak locations, price corrective work and retesting, and compare the repair budget with user-entered wet-cargo claim exposure.

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Need much more depth? Click Advanced above.Advanced adds a location-by-location leak register, gasket geometry, cleats, bearing pads, compression bars, drains, repair/retest costing, expected annual wet-cargo loss and repair payback.

Fast10 primary inputs

Core answerUT tightness + seal condition

Claim contextCargo value at risk, no invented probability

Fast Hatch Tightness Screen

Normalized %OHV is the cleanest mode when the instrument is set to 100 at open hatch. In raw-instrument mode, enter the actual approved/maker threshold directly rather than assuming that dB values are linear percentages.

Instrument display mode

Open Hatch Value, OHV100 in normalized mode; actual open-hatch reading in raw mode.

Corrective-action threshold10% in normalized mode; approved raw threshold in raw mode.

Maximum closed-hatch readingSame display units as the threshold.

Estimated affected seal lengthm of gasket/cross-joint needing attention.

Total sealing perimeter evaluatedm including evaluated cross-joints.

Measured gasket compression% compression from maker-approved measurement basis.

Maker minimum acceptable compression%. No universal value assumed.

UT equipment / calibration status

Wet-sensitive cargo value exposedSelected currency. Value behind this hatch, not expected claim loss.

Ultrasonic Test Basis

Instrument display mode

Open Hatch Value, OHV

Corrective-action thresholdCommon normalized practice is 10% OHV. Raw mode uses the approved instrument threshold entered here.

Equipment / calibration status

Total sealing perimeter evaluatedm.

Cross-joints / panel joints evaluated

Hatch-cover type

Visible water-track / corrosion evidence

Threshold handling: normalized mode uses the entered %OHV threshold directly. Raw mode never converts dB or other raw units by simple percentage arithmetic; use the instrument maker / service-supplier approved raw threshold.

Advanced Ultrasonic Leak Register

Record actual scan locations. Free-text location labels remain on screen only and are excluded from Tool Data.

Location	Reading	Affected m	Compression %	Defect	Repair action	Repair qty	Retest reading

Gasket Compression, Securing & Drainage

Gasket free heightmm.

Measured closed / compressed heightmm.

Maker minimum compression%.

Maker maximum compression%.

Representative landing / bearing-pad wearmm settlement/wear.

Cleats / wedges out of adjustment

Compression-bar corrosion / damage lengthm.

Drain channels / non-return drains

Repair Scope & Retest Cost

Additional gasket replacement quantitym beyond row-level gasket-replacement quantities.

Gasket material + installation costselected currency/m.

Cleat / wedge adjustment cost each

Landing-pad repairs required

Landing-pad repair / replacement each

Compression-bar steel repair cost / m

Additional labor hours

Labor rate / hour

Independent ultrasonic retest / survey

Downtime / berth impacthours.

Vessel / berth time valueselected currency/hour.

Repair contingency% of direct repair + labor + retest.

Wet-Cargo Claim Exposure

Incident probabilities are user/owner/insurer assumptions. The tool never converts an ultrasonic reading into an insurance probability.

Cargo value exposed in affected hold

Wet-sensitive share of cargo value%.

Damage severity if water ingress occurs% of wet-sensitive value.

Survey / legal / handling cost per incident

Operational days lost per incident

Vessel day value after cargo incident

Current wet-cargo incident probability / voyage% user assumption.

Post-repair incident probability / voyage% after successful repair/retest, user assumption.

Wet-sensitive voyages / year

Cargo insurance / recovery rate above deductibleApplied to modeled cargo damage only.

Owner / P&I deductible per incident

Other uninsured commercial exposure / incident

Survey & Maintenance Readiness

Calibrated / approved ultrasonic equipmentInstrument checks and maker procedure completed before/after survey as applicable. Qualified operator / service supplierOperator competence and service-supplier acceptance match class/owner requirements. Full peripheral + cross-joint scan completedCorners, cross-joints, vents and access openings were not skipped. Visual inspection correlated with UT readingsGaskets, compression bars, cleats, pads, drains and corrosion checked at high-reading locations. Repair photographs / PMS records retainedOwner can demonstrate maintenance and due diligence. Post-repair independent retest passedCorrective work has been verified before next moisture-sensitive cargo. Hatch-cover operation / securing visually satisfactoryPanel alignment, wedges/cleats, hydraulics/chains and securing checked. Drain channels and non-return devices verifiedDrainage arrangements are clear and functional.

Survey / risk screening only: this tool is not a class survey, approved ultrasonic service-supplier report, hose test, hatch-cover structural assessment, maker gasket-compression calculation, cargo-claim determination or insurance-coverage opinion. Tightness acceptance must follow the actual instrument procedure, attending surveyor/class/flag requirements and the vessel's hatch-cover maintenance system.

Reference basis: IACS Recommendation 14 addresses hatch-cover securing and tightness, including continuous elastic gaskets, securing devices, drainage arrangements and packing-line pressure. IACS UR Z17 Rev.21 is the current 2026 procedural requirement for service suppliers and includes firms engaged in ultrasonic tightness testing of closing appliances. P&I/industry survey practice commonly uses a corrective-action threshold at or above about 10% of Open Hatch Value, subject to the ultrasonic equipment procedure; dB-based survey forms commonly state a preferred minimum OHV of about 40 dB. The 2011 ESP Code, as amended, requires hatch-cover sealing effectiveness to be checked by hose testing or an equivalent method during applicable surveys and calls for inspection of gaskets, compression bars, drainage channels, non-return valves, cleats and related components.

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Hatch Cover Ultrasonic Tightness, Seal Repair & Wet-Cargo Claim Exposure Tool