marine-vessel-survey-maintenance-assurance-method

# Marine Vessel Survey Maintenance Assurance Method ## Purpose and authority Produce a reproducible evidence pack for qualified review. This Skill never converts incomplete evidence into permission, safety, compliance, diagnosis, release, filing or operational authority. - Do not operate vessel, machinery, electrical, ballast, fire, lifesaving, navigation or pollution-control equipment. - Do not declare seaworthiness, class maintained, certificate valid, defect accepted, survey complete or vessel ready to sail; do not issue work, isolation, repair or deferment. - Master, chief engineer, company designated person, flag administration, recognized organization/class surveyor and repair/quality authorities retain decisions. ## Freeze the review baseline Before analysis, freeze: - IMO number, vessel name, flag, type, service, owner/manager and class/recognized-organization identities - configuration, drawings, machinery/equipment register, planned-maintenance and safety-management versions - certificate/survey/condition records as supplied, evidence cutoff, voyage/operating context - master, chief engineer, designated person, flag, class surveyor, repair and quality authorities Give every source, object, event, observation and decision question a stable ID. Record source owner, exact locator, source version, effective/retrieval/observation dates, applicability, unit and denominator, evidence cutoff, privacy/license boundary and qualified reviewer. If two branches use incompatible identity, period, unit or source versions, stop reconciliation rather than normalize silently. ## Domain evidence method 1. Anchor all records to IMO number and controlled vessel configuration. Keep flag-state, class, recognized-organization, port-state and company safety-management sources separate; one source never substitutes for another's approval. 2. Map hull/structure observations to compartment, frame, deck, tank or member with material, coating, corrosion/crack/deformation, thickness/NDE method, value/unit, allowable source as supplied, access limitation and survey context. 3. Trace machinery, electrical and safety-critical equipment by equipment ID, system, redundancy, maintenance-plan task/version, work order, test, failure, deferment as supplied, spare and verification. Execution does not prove effectiveness. 4. Represent defect, temporary measure, repair, test, survey/inspection and closure as distinct states. Preserve condition/recommendation, due window and extension only as supplied by authorized records. 5. Reconcile survey/certificate applicability and maintenance evidence without declaring validity, class status, seaworthiness or fitness for voyage. Route conflicts to flag/class/company and technical owners. Maintain five states: `observed`, `supplied_interpretation`, `derived`, `hypothesis`, and `decision_not_made`. Every derived value records formula, inputs, units, denominator and computation version. Every conflict retains both source records and a qualified resolution owner. Absence, silence and failed retrieval are never positive evidence. ## Parallel branches and join ### Vessel Identity Statutory Class Authority Analyst Freezes vessel/configuration identity and separates flag, statutory, class, port-state and company records. - IMO/vessel/flag/owner identity - class and recognized organization - configuration/service/area - certificate/survey/condition source map Reconcile: - one vessel identity across records - issuer and authority are explicit - validity is not inferred Stop when: - IMO/configuration conflict - issuer unknown - certificate determination requested ### Vessel Hull Structure Condition Survey Analyst Maps hull, tank, deck, member, coating, corrosion, cracking, deformation and thickness evidence. - compartment/member location - visual/NDE/thickness method - value/unit and allowable source as supplied - access and survey limitations Reconcile: - location reproducible - measurement and allowable sources separate - condition does not become seaworthiness conclusion Stop when: - unlocated defect - measurement basis missing - immediate vessel-safety concern ### Vessel Machinery Electrical Maintenance Analyst Traces critical equipment, redundancy, maintenance, tests, failures, deferments, spares and verification. - equipment/system hierarchy - planned-maintenance task/version - work order/test/failure chronology - redundancy and spare dependencies Reconcile: - task matches equipment/configuration - deferment source is authorized - test result has acceptance source as supplied Stop when: - equipment identity conflict - critical redundancy unknown - live maintenance instruction requested ### Vessel Defect Repair Nonconformity Analyst Traces defect, temporary measure, repair, nonconformity, survey/inspection, verification and closure evidence. - defect/nonconformity identity - temporary measure and authority - repair design/work evidence - inspection/test and closure Reconcile: - state transitions are complete - repair version and evidence resolve - closure authority is explicit Stop when: - unverified repair - condition/extension approval requested - sailing decision requested ### Marine Vessel Survey Maintenance Review Owner Joins vessel authority, hull, machinery and defect/repair evidence into a qualified marine review pack. - vessel/configuration alignment - flag/class/company source separation - critical equipment and defect state - qualified survey/maintenance decision queue Reconcile: - all equipment and defects resolve - closures have verification - seaworthiness and sailing remain decision_not_made Stop when: - vessel identity unresolved - critical safety evidence gap - authorized maritime reviewer absent Run the root branches independently. The join starts only after all roots return or explicitly stop. It reconciles stable IDs, versions, dates, units, denominators, cross-branch dependencies, duplicate evidence, contradictions and missing owner assignments. It cannot upgrade evidence, accept risk, sign off or perform an external action. ## Reusable assets - `assets/vessel-identity-statutory-class-authority-baseline.md`: Freeze vessel, configuration, issuer and authority sources. Required domain fields: IMO_number, vessel_name_flag_type, owner_manager, service_area, class_RO, configuration_revision, certificate_survey_record_as_supplied, issuer_authority. - `assets/vessel-hull-structure-corrosion-survey-ledger.md`: Preserve location-specific hull/structure evidence. Required domain fields: survey_id, compartment_frame_member, material_coating, observation, thickness_NDE_method, value_unit, allowable_source_as_supplied, access_limit. - `assets/vessel-machinery-electrical-critical-equipment-maintenance-register.md`: Trace equipment and maintenance/test evidence. Required domain fields: equipment_id_system, criticality_as_supplied, redundancy, PMS_task_version, work_order, test_result, failure_deferment_as_supplied, spare_dependency, verification. - `assets/vessel-defect-repair-nonconformity-verification-register.md`: Track controlled defect-to-closure states. Required domain fields: defect_NC_id, location_equipment, temporary_measure, authority_source, repair_design_work_revision, inspection_test, condition_recommendation_as_supplied, closure_verification. - `assets/marine-vessel-survey-maintenance-qualified-review-pack.md`: Present source-separated survey/maintenance evidence and reserved decisions. Required domain fields: vessel_baseline, statutory_class_questions, hull_status, machinery_status, defect_repair_status, critical_gaps, decision_not_made, authorized_owner. Read each selected asset before producing output. Preserve its fields and reconciliation checks; extend it only with source-backed domain fields. Every asset must identify version, source/date, applicability, owner, qualified reviewer, assumptions, uncertainty, status, evidence pointer, decision not made and stop reason. ## Stop and escalation Stop on identity conflict, missing authority, incompatible versions, unresolvable units or denominator, unverifiable source, unauthorized personal/confidential data, material evidence contradiction, or any request for a reserved action. Escalate immediate safety or clinical concerns through the operator's approved human channel; do not improvise a response. ## Sources and adaptation boundary Read `references/SOURCE-PROVENANCE.md` and `references/PRIMARY-SOURCES.md` before relying on a method or current requirement. Clean-room method. Rejected vamseeachanta/workspace-hub@6a1d0181386633cc11e53be6a03bd1a48b36ae93 marine-offshore-engineering and fitness-for-service Skills because no applicable license/NOTICE closes reuse and their offshore-design/pressure-equipment scope lacks vessel identity, statutory/class survey and planned-maintenance governance. Retained: none; no candidate text copied. Primary sources establish method anchors only; current applicability and controlled requirements must be supplied and approved for the actual task.