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SINDYBAD® / MARINE DIVISION MUSCAT · OMAN · GCC

Professional Underwater Assessment & Documentation

Underwater Inspections & Marine Surveys.

Gain a clear understanding of your vessel’s underwater condition through professional visual inspections, marine survey support and structured reporting—carried out with minimal disruption to vessel operations.

✓ In-water visual assessment ✓ Hull & underwater-component inspection ✓ Photo & video documentation ✓ Clear findings & structured reporting
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01 Visual Assessment 02 Evidence Capture 03 Structured Reporting
Professional underwater vessel inspection
UNDERWATER ASSESSMENT MARINE / 01
INSPECTION CAPABILITY / 01 Visual evidence. Clear technical reporting.

Hull, propeller, rudder, thruster, sea chest, anode and accessible submerged-component inspection supported by professional documentation.

025M / EXECUTIVE SERVICE OVERVIEW

Clear Visibility Below the Waterline.

Obtain practical visual evidence of accessible submerged areas while the vessel remains afloat where permitted.

Service Mandate

The condition of a vessel’s submerged structure and equipment cannot always be evaluated from above the waterline. Marine growth, coating deterioration, impact damage, corrosion, rope entanglement and component wear may remain unnoticed until they begin affecting vessel safety, performance or operation.

Sindybad provides underwater inspections and marine-survey support for commercial vessels, workboats, offshore-support vessels and other marine assets.

Depending on the required scope, inspections may cover the hull, propeller, rudder, thrusters, sea chests, gratings, anodes, weld seams and other submerged components.

Findings can be supported by photographs, video footage, written observations, location references and recommendations for further action.

The service can be arranged for routine condition monitoring, damage investigation, maintenance planning, pre-purchase evaluation, operational troubleshooting or preparation for a more formal technical survey.

In-Water Visual assessment
Photo + Video Evidence capture
Structured Findings & reporting
Responsive Marine coordination

050M / CONDITION RISK REGISTER

Identify Problems Before They Become Operational Failures.

Routine inspection creates a structured view of visible underwater conditions and helps technical teams decide whether monitoring, cleaning, repair, dry-docking or specialist investigation is required.

01
HULL & COATING Surface Condition
Marine-growth accumulation Hull-coating deterioration Visible corrosion Dents and impact damage Suspected cracks or structural irregularities
02
PROPULSION & PROTECTION Critical Components
Propeller-blade damage Cavitation marks Rope, wire or net entanglement Damaged or missing anodes
03
INTAKE / STEERING Operational Exposure
Blocked sea chests or gratings Rudder abnormalities Thruster damage Loose or missing components
04
ABNORMAL CONDITIONS Escalation Indicators
Leakage or unusual discharge Debris around underwater machinery Conditions requiring cleaning, repair or further examination
Technical Principle

Early identification allows the vessel operator to evaluate the seriousness of an observation and decide the appropriate next action within the limitations of a visual inspection.

075M / TECHNICAL INSPECTION SCOPE

A Component-Based Inspection Register.

The exact inspection scope is agreed according to vessel type, operational concern, underwater configuration and customer requirements.

REF. INSPECTION AREA SCOPE STATEMENT RECORDS
01 Underwater Hull Inspection

External hull examination for visible damage, fouling and coating condition.

13 items
INSPECTION COVERAGE / OBSERVATIONS
Port & starboard hull sides Bow section Stern section Flat bottom Bilge areas Bilge keels Boot-top & waterline Weld seams Shell-plating surfaces Keel area Structural connections Previously repaired areas Technical-team priority areas
02 Propeller Inspection

Propeller inspection for visible damage, contamination and surface abnormalities.

23 items
INSPECTION COVERAGE / OBSERVATIONS
Pressure faces Suction faces Leading edges Trailing edges Blade tips Blade roots Propeller boss / hub Propeller cone Fasteners Rope guard Accessible shaft area Marine growth Surface roughness Cavitation marks Suspected cracking Edge damage Blade deformation Pitting Corrosion Foreign-object impact Rope / net entanglement Oil leakage Loose visible components
03 Rudder Inspection

Visual review of rudder condition and accessible operational components.

13 items
COVERAGE
Surface condition Marine growth Visible damage Coating breakdown Corrosion Dents / deformation Abnormal clearances Pintle area Gudgeon area Visible movement Leakage Entanglement Damaged components
04 Sea Chest & Grating Inspection

Inspection of cooling-water and seawater intake areas.

12 items
COVERAGE
Sea-chest gratings Cooling-water intakes Suction openings Discharge openings Grating bars Fastenings Blockage Marine growth Debris Visible damage Loose components Coating & corrosion
05 Bow & Stern Thruster Inspection

Accessible thruster areas reviewed for fouling, impact and leakage.

12 items
COVERAGE
Tunnel condition Thruster blades Blade tips & edges Hub condition Protective grids Entanglement Marine growth Impact damage Coating breakdown Corrosion Oil leakage Loose components
06 Sacrificial Anode Inspection

Visual assessment of accessible anodes and attachments.

9 items
COVERAGE
Anode location Consumption level Missing anodes Loose anodes Damaged anodes Uneven consumption Attachment condition Marine growth Surrounding condition
07 Stern Gear & Shaft-Area Inspection

Visual documentation of accessible stern-gear areas.

12 items
COVERAGE
Stern-tube area Propeller shaft Rope guard Shaft brackets Struts Bearing housings Visible seals Oil leakage Entanglement Corrosion Coating condition Physical damage
08 Anchors, Chains & Underwater Fittings

Customer-specified submerged fittings where accessible.

12 items
COVERAGE
Anchors Anchor pockets Visible chain Fairleads Seawater openings Drain openings Echo-sounder areas Speed logs Transducers Underwater lights Stabilizer components Other specified fittings

100M / INSPECTION PROGRAMMES

Scope Built Around the Operational Objective.

Different operational objectives require different inspection scopes rather than one standard attendance.

PROGRAMME A
Planned Condition & Maintenance

Routine monitoring and cleaning-related condition documentation.

01
Routine Condition Inspection

Periodic visual inspection of hull and underwater equipment.

Between scheduled dry-dockings Following extended anchorage Before a long voyage Before charter commencement Preventive maintenance Heavy-fouling waters Updated underwater documentation
02
Pre-Cleaning Inspection

Fouling assessment before cleaning begins.

Growth type Fouling severity Fouling distribution Coating condition Special-attention areas Cleaning method Estimated work scope Restricted cleaning areas This inspection can support planning for hull cleaning and propeller polishing.
03
Post-Cleaning Inspection

Documentation after hull cleaning or propeller polishing.

Scope confirmation Cleaned condition Remaining localized growth Coating condition Propeller condition Before / after evidence Outstanding areas
PROGRAMME B
Incident & Diagnostic

Focused inspection following abnormal operation, damage concern or entanglement.

04
Damage Inspection

Focused inspection following suspected underwater damage.

Grounding Berthing contact Collision Floating debris Propeller strike Heavy weather Fishing-net entanglement Anchor / chain contact Abnormal vibration Unexpected leakage Loss of propulsion performance Thruster malfunction A visual underwater inspection does not replace structural engineering assessment, class survey or NDT where required.
05
Rope & Net Entanglement Inspection

Establish visible extent and support safe removal planning.

Propellers Shafts Rope guards Thrusters Rudder components Stern gear Underwater fittings Removal should be handled under a separately agreed scope where required.
PROGRAMME C
Survey, Docking & Verification

Evidence supporting transactions, docking planning and post-work verification.

06
Pre-Purchase / Condition Survey Support

Underwater evidence supporting broader condition assessment.

Hull condition Fouling severity Propeller appearance Rudder condition Anode condition Coating breakdown Visible impact damage Sea-chest condition Thruster condition Areas requiring further assessment A complete pre-purchase survey normally covers systems beyond underwater areas and should be coordinated with a qualified marine surveyor.
07
Pre-Dry-Docking Inspection

Evidence supporting dry-dock work-package planning.

Repair lists Cleaning requirements Propeller work Anode replacement estimates Coating repairs Steel-repair planning Thruster maintenance Sea-chest servicing Specialist attendance
08
Post-Repair Verification

Visual documentation following authorized underwater work.

Completed-work appearance Repair location Accessible attachments Installed components Specified work area Outstanding observations Technical acceptance remains subject to customer requirements and any applicable class or authority approval.

125M / MARINE SURVEY GOVERNANCE

Clear Distinction Between Inspection & Class Survey.

The agreed scope should clearly define whether the work is a general condition inspection, customer-witnessed survey, measurement exercise or class-related examination.

Typical Stakeholders

Who the evidence may support

Vessel owners Ship managers Technical superintendents Charterers Operators Port agents Marine insurers Repair contractors Engineering consultants Pre-purchase surveyors Damage assessors Offshore operators
Service Distinction General Visual Inspection Formal Classification Survey
Primary Purpose

Maintenance planning and operational decision-making.

Defined classification purpose under the relevant society’s rules.

Typical Evidence

Photographs, video and visual observations of accessible underwater areas.

Specified equipment, records, procedures and evidence required for the defined class purpose.

Personnel / Acceptance

Delivered within the agreed general inspection scope and stated limitations.

Appropriately qualified or approved personnel, with surveyor witnessing or acceptance where required.

FORMAL CLASS-RELATED REQUIREMENTS ✓ Defined class purpose ✓ Relevant classification-society rules ✓ Qualified or approved personnel ✓ Surveyor witnessing where required ✓ Specified equipment and procedures
Scope Integrity

A routine visual inspection should not be represented as a classification survey unless the relevant approval, qualified personnel and class arrangements are in place.

150M / CONTROLLED INSPECTION WORKFLOW

Eight Controlled Steps. One Clear Handover.

Every attendance is developed around the customer’s objective, vessel condition, operating restrictions, evidence requirements and reporting scope.

01 Planning Requirement Review

Vessel information, location, inspection areas, inspection purpose, report requirements, attendance date and known concerns are reviewed.

02 Planning Scope Development

Components, priority areas, photographs, video, measurement requirements and reporting format are defined.

03 Control Operational & Safety Planning

Isolation, permissions, weather, current, visibility, vessel traffic, communications and emergency arrangements are reviewed.

04 Coordination Pre-Dive Coordination

Inspection sequence, priority areas and evidence requirements are confirmed with the responsible vessel representative.

05 Inspection Underwater Inspection

Components are inspected systematically according to the agreed sequence and vessel configuration.

06 Evidence Photo & Video Documentation

Accessible areas are documented according to visibility, conditions and the agreed evidence scope.

07 Review Findings Review

Recorded evidence is organized and significant observations are separated from routine condition notes.

08 Handover Reporting & Handover

The agreed report, media, observations, limitations and recommended next actions are delivered.

175M / INSPECTION REPORT PACKAGE

Documentation Built for Technical Review.

The handover can combine attendance details, inspection conditions, component observations, media evidence and recommended next actions.

01
ATTENDANCE RECORD Vessel & Conditions
Inspection attendance record Vessel & location details Date & time Weather & underwater conditions Visibility notes Areas inspected Areas not accessible
02
TECHNICAL OBSERVATIONS Component Assessment
Hull-condition observations Fouling assessment Propeller observations Rudder observations Thruster observations Sea-chest / grating observations Anode observations Shaft-area observations
03
EVIDENCE REGISTER Media & Findings
Photo documentation Underwater video Visible-damage register Finding-location references Before / after comparison
04
TECHNICAL HANDOVER Actions & Final Report
Cleaning recommendations Further-inspection recommendations Final service report
Reporting Limitation

Observations remain subject to underwater visibility, accessibility, operational conditions and limitations stated in the agreed report.

200M / REPORTING FRAMEWORK

Observations Prioritized for Clear Communication.

The framework separates routine observations from conditions requiring maintenance, technical attention or prompt review.

01 Routine Normal Observation

No significant visible abnormality identified within the limits of the inspection.

02 Plan Maintenance Observation

An area may require cleaning, coating attention, monitoring or routine maintenance.

03 Assess Technical Attention Recommended

A visible condition may require assessment by technical management, a surveyor or specialist contractor.

04 Escalate Urgent Review Recommended

A potentially serious visible condition should be communicated promptly to the responsible vessel representative.

Classification Note

These categories are communication tools and do not replace a formal engineering or classification determination.

225M / TECHNICAL FINDINGS & OPTIONS

From Visible Conditions to Specialist Examination.

Potential observations are organized by condition family, while measurement and specialist services remain clearly separated from the visual inspection scope.

Observed Condition Register 26 indicators
GROWTH & COATING Slime, weed & shell growth Heavy localized fouling Coating loss Blistering Peeling / flaking coating Visible corrosion Pitting
PHYSICAL / STRUCTURAL Dents Scratches & gouges Impact marks Suspected cracking Weld irregularities
PROPULSION / COMPONENTS Propeller-edge damage Blade deformation Cavitation damage Missing / damaged anodes Loose visible fittings Blocked gratings Debris accumulation
OPERATIONAL / OTHER Rope / net entanglement Oil / air leakage Damaged thruster grids Missing fasteners Abnormal rudder appearance Foreign objects Previously repaired areas
Measurement & Advanced Options 14 services
MEASUREMENT & MAPPING Rudder-clearance measurement Propeller-shaft clearance checks Dent-dimension recording Damage-location measurement Anode-dimension estimation Coating-condition mapping Growth-coverage estimation
NDT & SPECIALIST EXAMINATION Ultrasonic thickness measurement Underwater crack-detection support Underwater NDT Weld inspection
REMOTE / LOW VISIBILITY Underwater structure mapping ROV inspection Sonar inspection

Specialist services require appropriate equipment, qualified personnel, procedures and relevant authority or classification approval where applicable.

250M / INSPECTION METHOD SELECTION

Diver-Led Inspection or ROV Deployment.

Method selection depends on access, depth, current, visibility, vessel configuration and required inspection detail.

Method Profile 01 / Diver Inspection 02 / ROV Inspection
Primary Advantage

Close visual access and flexible positioning around underwater components.

Remote visual coverage where diver access is restricted or reduced personnel exposure is preferred.

Typical Application
Close-up hull inspection Propeller & rudder examination Physical confirmation of loose items Measurement tasks Marine-growth assessment Entanglement assessment Detailed component photography
Restricted diver access Difficult-to-reach areas Rapid general survey Continuous video Suitable operational conditions Reduced personnel exposure
SELECTION CRITERIA Access Depth Current Visibility Vessel Configuration Required Detail

275M / FLEET & ASSET COVERAGE

Support Across Commercial Marine Assets.

Inspection and survey support may be arranged for vessels, floating structures, marine infrastructure and other submerged assets subject to access and operating conditions.

01 DEEP-SEA COMMERCIAL Container vessels Bulk carriers Oil & chemical tankers LNG & LPG vessels General cargo vessels
02 OFFSHORE & WORKBOAT Offshore-support vessels Platform-supply vessels Anchor-handling vessels Tugboats Barges Workboats Crew boats Dredgers
03 PASSENGER / SPECIALIST Fishing vessels Ferries Passenger vessels Yachts Naval-support craft Harbour vessels
04 MARINE INFRASTRUCTURE Floating structures Pontoons Jetties Marine terminals Underwater pipelines Other submerged marine assets

300M / BUSINESS OUTCOMES

Better Evidence for Better Decisions.

Professional underwater documentation supports maintenance planning, reduces uncertainty and helps technical teams focus follow-up work where it matters.

01
Better Maintenance Decisions

Prioritize maintenance using observed condition rather than assumptions.

02
Reduced Operational Disruption

Where permitted, inspection may be completed while the vessel remains afloat.

03
Early Problem Identification

Visible abnormalities can be detected before becoming more significant operational issues.

04
Clear Documentation

Photographs, video and structured observations provide a practical technical record.

05
Improved Repair Planning

Findings can support repair lists, contractor scope and dry-docking preparation.

06
Focused Follow-Up

Areas of concern can be referred for specialist, engineering or classification review.

325M / OPERATIONAL READINESS

Controlled Underwater Work Before Entry.

Underwater inspection should proceed only after suitable safety, operational and environmental controls are established.

GATE 01 Authorization & Isolation
✓ Formal vessel authorization ✓ Port / terminal approval ✓ Diving permit ✓ Machinery isolation ✓ Propeller / thruster lockout ✓ Suction / discharge control
GATE 02 Communication & Emergency
✓ Bridge / engine-room communication ✓ Safe access & recovery ✓ Diving-team readiness ✓ Emergency-response plan
GATE 03 Operating Environment
✓ Vessel traffic ✓ Weather & sea state ✓ Current & tide ✓ Visibility ✓ Lighting ✓ Underwater hazards
Environmental Considerations

Activities should comply with applicable environmental, port and local requirements.

AREA / POLLUTION CONTROLS
✓ Restricted diving areas ✓ Sensitive marine environments ✓ Pollution-prevention procedures ✓ Avoid unnecessary coating disturbance
GROWTH / WASTE CONTROLS
✓ Control of removed marine growth ✓ Port in-water cleaning rules ✓ Waste & debris recovery ✓ Visible leakage reporting ✓ Safe recovered-material handling

350M / SINDYBAD DELIVERY MODEL

Responsive Marine Support in Oman.

Practical coordination and professional support for vessel owners, operators, managers and marine contractors.

01 PLANNING & COORDINATION Vessel-specific inspection planning Responsive local coordination Clear scope definition
02 TECHNICAL DELIVERY Routine & urgent requirements Component-by-component inspection Photo & video documentation
03 DECISION SUPPORT Structured findings Practical next-action recommendations Coordination around vessel schedules
04 CLIENT INTERFACE Combined inspection / cleaning support Vessel-representative communication Transparent reporting
Marine support coordination
LOCAL COORDINATION Clear communication throughout the assignment.

375M / QUOTATION INPUT REGISTER

Information Required for Scope & Pricing.

Providing the available vessel and inspection information allows the marine team to review the requirement more efficiently.

01 Vessel Particulars
Vessel name IMO number Vessel type Flag Classification society Vessel dimensions
02 Location & Attendance
Current / expected location Port-agent information ETA / ETD Preferred inspection date
03 Inspection Purpose & History
Reason for inspection Required underwater areas Known / suspected damage Incident information Previous inspection report
04 Evidence & Reporting
Vessel drawings Required photographs / video Required measurements Reporting format Class / surveyor involvement
05 Coordination & Constraints
Cleaning / removal requirement Operational limitations Onboard contact details
COMMERCIAL HANDOVER Send the available vessel and inspection information to our marine team.
Request an Inspection Quote ↗
01 Can the inspection be completed while the vessel remains afloat?

Yes, where the location, regulations, vessel condition and operational controls permit. Approval must be confirmed before attendance.

02 Does the vessel need to stop its machinery?

Relevant propellers, thrusters, intakes, discharges and associated systems must be appropriately isolated and controlled.

03 How long does an inspection take?

Duration depends on vessel size, inspection scope, visibility, currents, access, documentation requirements and the number of components being inspected.

04 Can you inspect only the propeller?

Yes. Targeted inspections can be arranged for the propeller, rudder, sea chests, thrusters, anodes or other specified components.

05 Will we receive photographs and video?

Yes, when included in the agreed scope and when underwater visibility permits suitable recording.

06 Can the inspection confirm whether the vessel is structurally safe?

A visual inspection can identify and document visible conditions. It cannot independently confirm structural integrity without appropriate engineering assessment, measurements or approved nondestructive testing.

07 Is this the same as an official classification survey?

No. A general underwater inspection is not automatically a class survey. Class-related work must be arranged according to the relevant classification society’s requirements.

08 Can rudder or shaft clearances be measured?

Measurements may be arranged where technically possible and included in the agreed scope. Method, accuracy and acceptance criteria should be confirmed in advance.

09 Can ropes or fishing nets be removed?

Removal may be possible under a separately agreed scope, subject to safety, accessibility and operational conditions.

10 Can the hull be cleaned after inspection?

Yes. If significant fouling is identified, underwater hull cleaning and propeller polishing may be quoted separately or as part of a coordinated service.

11 Can you inspect damage after grounding or collision?

Yes. A focused inspection can document accessible damage. Serious observations should be referred to technical management, class, insurer or qualified marine engineering support.

12 What happens if underwater visibility is poor?

The inspection may be limited, postponed or completed using alternative equipment where appropriate. Limitations should be stated clearly in the report.

425M / FINAL APPROACH

Understand Your Vessel’s Underwater Condition.

From routine condition monitoring to damage assessment and maintenance planning, Sindybad provides underwater inspections supported by clear visual evidence and professional reporting.

Share your vessel details, location, inspection scope and preferred attendance date with our marine team.

Request an Inspection Quote ↗ Contact Our Marine Team →