In-Water Class Survey at Nhava Sheva Port
Class attendance without opening a dry dock
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Tell us the vessel, the port and the window. Scoped reply, usually the same working day.
Cleanship Marine delivers class-approved in-water surveys at Nhava Sheva Port, Maharashtra, with high-definition live video to a surface monitoring station, diver-to-surveyor communications and a full report package for the class file.
Classification societies accept in-water survey in place of drydocking for many vessels and inspection scopes, provided the work is done by an approved diving contractor to a defined procedure with the surveyor able to see the structure in real time. Shelter is on your side here — the vessel is stable and the dive is uninterrupted — but basin silt means the lighting and camera plan has to be agreed with the surveyor before the class attendance is booked, not improvised on the day.
What it gets you
- Survey requirement satisfied without opening a dry dock or taking the vessel off hire
- Surveyor sees the structure live rather than reviewing a recording after the fact
- Defects located precisely against hull reference marks, not described approximately
- A report package built for the class file, not a video dump
Working conditions at Nhava Sheva
Nhava Sheva sits inside Mumbai harbour, so it is sheltered and anchorage work runs through most of the year with the south-west monsoon the main interruption. Container terminal windows are tight and productivity-driven, so a hull clean has to be scoped to run in parallel with cargo work and never to hold the berth. Harbour water is silty with moderate to low visibility, so survey-grade video is planned for, not assumed.
- Where we work
- Container terminal berths · Liquid berth · Harbour anchorage
- Vessels we see here
- Main-line and feeder container ships · Product tankers
What we do at Nhava Sheva
- Survey programme agreed in advance with the class society and the surveyor attending at Nhava Sheva
- Hull plating, welds, sea chests, rudder, propeller and stern gear inspected to the agreed scope
- Live high-definition video to the surface station with two-way diver-to-surveyor communications
- Hull markings and reference points confirmed so the surveyor can locate every feature precisely
- Diving permission and any environmental clearance cleared with Jawaharlal Nehru Port Authority
- Full report package with video, stills and findings issued for the class file
Planning the window at Nhava Sheva
The south-west monsoon governs the calendar at Nhava Sheva Port, roughly June to September. Swell and reduced surface visibility close most open-water work on this coast for the duration, and the weeks either side are unreliable rather than unusable. Because the harbour is sheltered, work here normally runs alongside or at a protected anchorage and can proceed in parallel with cargo operations rather than competing with them for the berth window.
Work is taken at the container terminal berths, liquid berth and harbour anchorage, and which of those a vessel ends up at changes the dive plan more than the season does. Teams mobilise via Mumbai (BOM), so give us the ETA as early as you have it — the travel is the flexible part, the approvals and the working window are not.
What we typically find at Nhava Sheva
Liquid and gas tonnage here spends long stretches at the terminal or waiting for a slot, so growth tends to be even and well established across the hull rather than patchy — heavier than the trading pattern suggests, and further along than a speed report alone would indicate.
Shelter is a mixed blessing for a hull. The same calm that makes the port easy to work in is still water, and still water grows fouling faster than an exposed berth does.
Standard scope of work
Included as standard on every in-water class survey attendance, wherever the vessel is. Anything outside it is quoted separately and flagged before mobilisation, never added afterwards.
- Hull structure inspection
- Shell plating, welds, bilge keels and openings inspected with continuous video and commentary, with cleaning of areas as needed for meaningful viewing.
- Rudder and steering gear
- Rudder plating, pintles, bearings and clearances inspected and, where required, measured.
- Propeller and stern arrangement
- Propeller, boss, rope guard and stern tube seal inspected for damage, erosion and leakage.
- Sea chests and openings
- Sea chests, gratings, valves and overboard discharges inspected and recorded.
- Anodes and coating
- Sacrificial anode wastage assessed and coating condition mapped for planning the next dry docking.
How we deliver it at Nhava Sheva
- 1
Scope and vessel details
Tell us the vessel, her particulars, the coating specification and the window at Nhava Sheva. We come back with a defined scope, a crew size and a duration we will stand behind. Where the conditions here will not support what has been asked for, we say so at this stage rather than after mobilisation.
- 2
Permits and approvals
Diving permission is obtained from Jawaharlal Nehru Port Authority, along with terminal approval where the berth requires it and any environmental clearance for in-water work. This is handled by us, not left with the agent to chase.
- 3
Mobilisation to Nhava Sheva
Divers, compressors, brush carts and cameras mobilise via Mumbai (BOM). Where a vessel is also calling at Mumbai, one mobilisation is normally sized to cover both.
- 4
Safety setup and the dive
The vessel is secured for diving — main engine, shaft and thrusters immobilised, sea suctions confirmed shut, permit agreed with the master. Teams work under surface supervision with continuous diver communications and video throughout.
- 5
Report and handover
A completion report covering in-water class survey is issued with before-and-after imagery, coating and anode condition and anything found that you should know about. The findings are discussed with the vessel rather than emailed and forgotten.
Nhava Sheva Port at a glance
- UN/LOCODE
- INNSA
- Port type
- Major Port
- State
- Maharashtra
- Country
- India
- Water body
- Arabian Sea, Mumbai harbour
- Port authority
- Jawaharlal Nehru Port Authority
- Main cargoes
- Containers, Liquid bulk, Project cargo
- Crew mobilisation
- Mumbai (BOM)
- Services here
- Hull Cleaning, Hold Cleaning and Tank Cleaning
Frequently asked — In-Water Survey at Nhava Sheva
Do you provide in-water class survey at Nhava Sheva Port?
Yes. Cleanship Marine works Nhava Sheva Port (INNSA) in Maharashtra, India, covering the container terminal berths, liquid berth and harbour anchorage. Teams mobilise via Mumbai (BOM) with the full spread.
Can in-water class survey be done while the vessel works cargo at Nhava Sheva?
Yes, in most cases. The harbour is sheltered enough that divers work alongside while cargo operations continue, and neither holds the other up. The vessel stays on hire throughout, and there is no diversion and no dry dock. We scope against the conditions at Nhava Sheva and tell you honestly whether the window you have is enough.
Do you need a diving permit from Jawaharlal Nehru Port Authority?
Yes, and we obtain it. Diving permission from Jawaharlal Nehru Port Authority, terminal approval where the berth requires it, and any environmental clearance for in-water work are arranged as part of the job rather than left with the agent. The master's permit to work and the immobilisation of machinery are agreed on board before anyone enters the water.
What is underwater visibility like at Nhava Sheva?
Visibility at Nhava Sheva Port is moderate, and it drops further around active bulk handling and after heavy rain, and the south-west monsoon sets the outer limits of the calendar. How the tide and sea state shape the dive plan is set out in full in the working-conditions section on this page.
Which vessels do you carry out in-water class survey on at Nhava Sheva?
Main-line and feeder container ships, Product tankers — the traffic at Nhava Sheva Port runs to containers, liquid bulk and project cargo, so those are the profiles we see most. The scope is sized to the vessel, not to a standard package.
How quickly can a team mobilise to Nhava Sheva?
Divers and equipment mobilise via Mumbai (BOM). Give us the ETA and the window and we will confirm what is achievable rather than promise a date we cannot hold. Where the vessel also calls at Mumbai or Dahanu, one mobilisation is often sized to cover both.
What does in-water class survey at Nhava Sheva cost?
It depends on the vessel's dimensions and wetted area, the fouling state found, the coating specification and the working window available at Nhava Sheva. We would rather scope it properly and give you a specific figure than quote a headline rate that changes once the work starts. Send the details and the window at Nhava Sheva and you get a scoped price, usually the same working day.
In-Water Class Survey at Nhava Sheva Port.
Tell us the vessel, her ETA at Nhava Sheva and the window. You get a scope, a crew size and an honest duration — usually the same working day.