Underwater Hull Inspection Kamsar

The hull is a ship's largest asset and her most exposed. Bauxite carriers calling at Kamsar spend long periods at anchor, load heavy cargoes and work in warm, nutrient-rich estuarine water, all of which stress the underwater hull. A regular underwater hull inspection finds problems early, long before they affect speed, fuel consumption or class status.

What a Hull Inspection Covers

A hull inspection covers the flat bottom, the bilge keels, the vertical sides, the bow and the stern, the rudder and the propeller area. The Diver examines each area for coating breakdown, rust, dents, cracks, damaged weld seams and marine growth. Every observation is recorded with a clear photograph and a position reference, so the superintendent can see exactly where a defect is.

Common Defects on Bauxite Carriers

• Coating damage caused by mooring lines, fenders, tug contact or anchor chain.
• Local corrosion where coating has failed, often near the bilge keel and the waterline.
• Dents or buckling on the bottom after light grounding or contact with the berth.
• Heavy marine growth after long anchor waits in warm water.
• Worn or missing sacrificial anodes, which leave the steel unprotected.

The Role of CCTV

CCTV allows the superintendent to watch the inspection live from the ship's office or another location, and to ask the Diver to look closer at anything unusual. A recorded video also provides a baseline for the next inspection. By comparing videos from successive visits, the superintendent can see how fast the coating is deteriorating and plan the next dry-docking.

Thickness Measurement

If corrosion or damage is suspected, the Diver cleans a small patch to bare steel and takes ultrasonic thickness readings. Readings are compared with the original plate thickness and the allowable diminution defined by the ship's class. If the readings approach class limits, the surveyor may require further action.

From Inspection to Action

An inspection that finds a problem is only useful if the problem can be solved. KamsarUnderwater.com can clean heavily fouled areas, polish the propeller, replace anodes, apply temporary repairs and, when needed, coordinate with a shipyard for permanent repairs.

Schedule an Inspection

Send the ship's details, last hull inspection and your main concern. We will prepare a scope and quotation.

Why Warm Estuarine Water Matters for the Hull

Kamsar lies in a warm tropical estuary, where seawater temperatures stay high through the year and nutrients flow in from the river. These conditions favour fast growth of slime, weed, barnacles and tube worms on any surface that is not fully protected. A ship waiting several weeks at anchor can collect enough fouling to reduce her speed and increase fuel use on the next voyage. Regular inspection shows how quickly the coating is performing in these conditions and helps the superintendent decide when to clean, when to touch up and when to schedule a full dry-docking. Early action saves money and avoids unplanned class conditions.

Comparing Inspections Over Time

A single inspection shows the hull at one moment. A series shows how it changes. By repeating inspections at regular intervals and using the same zones and photograph positions, owners can calculate the rate of coating breakdown, corrosion and fouling. This allows planned decisions about cleaning, touch-up and dry-docking, instead of reacting to surprises. We keep inspection records by ship and zone, so each new report can be compared with earlier ones quickly.

Inspecting Different Hull Zones

Each hull zone has typical problems. The waterline suffers from coating wear and fouling, the flat bottom from abrasion and grounding, the bilge keels from impact and the stern from propeller wash and cavitation. We tailor our attention to each zone.

Frequently Asked Questions (FAQ)

Q1. How often should a ship's hull be inspected underwater?

Many owners inspect every 6 to 12 months, and always after grounding, contact, or a long anchor wait.

Q2. How much plate thickness loss is acceptable?

This depends on class rules and the ship's structure. Substantial corrosion is generally treated as thickness loss approaching 75 per cent of the allowed diminution.

Q3. How long does a spot inspection take?

A focused inspection of an area, such as the rudder or bilge keel, normally takes 2 to 4 hours.

Q4. How far can marine growth reduce speed?

Industry studies report that heavy fouling can raise fuel consumption by 20 to 40 per cent or more, while light slime has smaller effects.

Q5. What does the inspection report contain?

A defect list, annotated photographs, video, thickness readings and recommendations for further action.