Open Hatch Value, Ultrasonic Leak Mapping, Gasket Compression, Repair Scope, Retest Cost & Wet-Cargo Claim Exposure

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

Turn an ultrasonic hatch-cover test into an owner-level repair and risk decision. Compare closed-hatch readings with the Open Hatch Value acceptance threshold, rank leak locations, quantify failed seal length, screen gasket compression and securing condition, build a repair and retest budget, estimate cargo-at-risk and probability-weighted wet-cargo exposure, and show whether repairing the hatch now is economically justified before the next sensitive cargo.

Currency
Currency selector changes display only. No exchange-rate conversion is performed.

Ultrasonic Test Basis

Industry practice compares closed-hatch readings with an Open Hatch Value (OHV). The common IACS / P&I convention treats readings at or above about 10% of OHV as requiring corrective action, subject to the instrument maker's approved procedure.

Use normalized %OHV when the receiver can be set to 100 at the open hatch.
100 in normalized mode; otherwise use the actual instrument display value.
%OHV in normalized mode, or manufacturer-specified instrument threshold in raw mode.
m including cross-joints being evaluated.

Simple Closed-Hatch Readings

%OHV or raw instrument units, matching display mode.
m of gasket / cross-joint requiring corrective work.

Advanced Ultrasonic Leak Register

Record the actual scan locations. Each row can carry its own reading, affected length, gasket compression and proposed repair action. Rows are automatically ranked by severity.

LocationReadingAffected mCompression %DefectRepairRepair qty

Gasket Compression & Sealing Condition

mm.
mm.
%.
%.
mm representative settlement / wear.
m.

Repair Scope & Retest Cost

m. Advanced mode also totals row-level repair quantities.
hours.
Selected currency/hour.
% of direct repair + labor + retest.

Wet-Cargo Claim Exposure

Claim probability is intentionally user-entered. Ultrasonic leakage severity is not converted into an invented insurance probability.

%.
% of wet-sensitive value.
% user / owner / insurer assumption.
% user assumption after successful repair and retest.
%.

Survey / Maintenance Readiness

Survey / risk screening only: This tool is not a class survey, IACS-approved service-supplier report, hatch-cover maker compression calculation, hose test, structural hatch-cover assessment, cargo claim determination or insurance coverage opinion. Ultrasonic acceptance must follow the actual equipment procedure, class / flag / surveyor requirements and the vessel's hatch-cover maintenance system. Probability-weighted claim exposure is a financial scenario using user-entered assumptions, not an empirical prediction from the ultrasonic reading.
Reference basis: IACS Recommendation 14 addresses hatch-cover securing and tightness, including continuous elastic gaskets, drainage arrangements, securing devices and packing line pressure. IACS UR Z17 contains procedural requirements for service suppliers, including ultrasonic tightness testing of hatch covers. Industry P&I practice commonly uses an Open Hatch Value comparison, with readings at or above approximately 10% of OHV treated as requiring corrective action, subject to the instrument manufacturer's procedure. The 2011 ESP Code requires hatch-cover sealing effectiveness to be checked by hose testing or an equivalent method during applicable surveys. Maintenance and repair records materially support an owner's due-diligence position if wet-cargo damage is later alleged.
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