Class-Approved In-Water Survey (UWI) & Post-Grounding Inspection Services
In-Water Survey (UWI) & Post-Grounding Inspection Services
In-water surveys (UWI) are a critical component of modern vessel maintenance, allowing shipowners and operators to assess underwater hull condition without the need for dry-docking. MaxiDive Co., Ltd provides professional in-water survey and post-grounding inspection services for commercial vessels operating in Thailand and throughout the Gulf of Thailand.
Our certified commercial diving teams deliver accurate underwater inspections, detailed reporting, and fast response for routine surveys, damage assessments, and emergency situations.
What Is an In-Water Survey (UWI)?
An in-water survey is a comprehensive underwater inspection of a vessel’s hull and underwater appendages performed by certified commercial divers. UWI services are commonly used for:
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routine hull condition assessment
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class-related inspections
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pre-docking or post-repair verification
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insurance and damage surveys
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post-grounding and post-collision inspections
UWI allows vessel operators to make informed technical decisions while minimizing downtime and operational disruption.
Post-Grounding & Damage Inspection
Following grounding, collision, or contact with underwater objects, a post-grounding inspection is essential to verify the structural integrity of the hull and underwater components.
MaxiDive conducts rapid-response post-grounding inspections to identify:
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hull deformation or indentation
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cracks or fractures
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coating damage and corrosion exposure
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rudder, shaft, and propeller misalignment
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damage to sea chests, anodes, or appendages
Early detection helps prevent secondary damage and supports timely reporting to class societies and insurers.
Our In-Water Survey Scope
MaxiDive’s in-water survey services include inspection of:
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underwater hull structure and plating
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weld seams and structural connections
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rudder, propeller, shaft, and bearings
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sea chests and gratings
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thrusters and appendages
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sacrificial anodes and coating condition
All inspections are conducted using professional diving procedures, supported by high-definition video and photographic documentation.
Reporting & Documentation
Each in-water survey and post-grounding inspection is completed with a detailed written report, including:
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HD photographs and video footage
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identified defects or abnormalities
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condition assessment and observations
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recommendations for corrective action
Our reports are suitable for submission to classification societies, insurance providers, ship managers, and port authorities.
Certified Expertise & 24/7 Availability
MaxiDive’s commercial divers have extensive experience performing in-water surveys under operational port conditions. We operate 24/7 and support vessels at anchor, alongside berth, or during port operations in key locations including Laem Chabang, Sattahip, Sriracha, and Bangkok Port.
All surveys are conducted in accordance with international safety standards and class requirements, ensuring accuracy, reliability, and compliance.
MaxiDive delivers professional in-water survey and post-grounding inspection services that protect vessel integrity, reduce operational risk, and support confident technical decision-making.
Class Approvals & Regulatory Acceptance
Class, Insurance & Port Authority Reporting
Why Class Approval Matters
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MaxiDive Co., Ltd provides in-water surveys and post-grounding inspections that are accepted by major international classification societies, insurance providers, and port authorities. Our inspection methodology, documentation standards, and reporting formats comply with class and regulatory requirements for commercial vessels.
MaxiDive services are approved and recognized by:
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DNV-GL
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Bureau Veritas (BV)
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ClassNK – Nippon Kaiji Kyokai
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Lloyd’s Register (LR)
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ABS – American Bureau of Shipping
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KR – Korean Register
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RINA Services S.p.A.
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CCS – China Classification Society
All in-water surveys and post-grounding inspections conducted by MaxiDive are completed with structured technical documentation suitable for submission to:
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Classification societies (for class-related surveys and condition assessment)
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Marine insurance companies (for damage surveys, claims, and incident reports)
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Port authorities and terminal operators (for operational clearance and compliance)
Each report includes:
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high-definition photographic and video evidence
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clear identification of damage, deformation, or abnormalities
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condition assessment of hull, appendages, and underwater structures
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professional observations and technical recommendations
This ensures transparency, traceability, and confidence for all stakeholders involved in vessel operations and regulatory oversight.
Using a class-approved diving contractor for in-water surveys and post-grounding inspections reduces operational risk and ensures:
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acceptance of survey results by classification societies
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smoother communication with insurers and technical managers
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avoidance of unnecessary dry-docking or repeat inspections
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faster decision-making following grounding or underwater incidents
MaxiDive’s approved status allows vessel operators to rely on one inspection process that meets multiple regulatory and commercial requirements.
Certifications
