Nireekshan Engineers & Surveyors
performance Metrics
Underwater CCTV Inspection
1950
+
Underwater Hull Cleaning
0
+
Clients
450
+
OUR SERVICES
DIVING/UNDERWATER SHIP SERVICES
We specialize in comprehensive subsea engineering services in Chennai, to meet the diverse needs of the maritime industry. Our offerings include Underwater Live CCTV Videography for ship classification purposes, allowing detailed inspections of rudder, pintle clearance, and propeller shaft wear-down clearance. We also provide sea chest and overboard valve blanking and unblanking to ensure operational safety. Our expertise extends to cold repairs for hull cracks, holes, and dents, as well as underwater thickness gauging measurements (UW UTG/NDT) to assess structural integrity.
Additionally, we handle the removal of fishing nets, ropes, and tyre fenders from propellers, ensuring optimal vessel performance. Our services include underwater blanking using steel mats, as well as welding and cutting for repairs. We also offer hydraulic hull cleaning and propeller polishing, helping to maintain vessel efficiency and reduce drag. With a focus on precision and safety, we deliver solutions tailored to the challenges of underwater maintenance and repair.
PORT/WHARF/PILES, FENDERS AND ITS UNDERWATER STRUCTURES MAINTENANCE
We offer a wide range of specialized services for wharf and underwater structure maintenance and analysis. Our expertise includes wharf and pile inspection using Non-Destructive Testing (NDT) and the rejuvenation of damaged wharves and piles through advanced pressure grouting techniques. We conduct underwater inspection and cleaning to ensure the structural soundness of submerged components.
Our services also encompass underwater core drilling and pile cutting at seabed levels, as well as bathymetry and depth measurement surveys to assess underwater terrain and ensure navigational safety. Additionally, we provide dredging services, including operations near wharf areas, and undertake wharf maintenance and structural integrity analysis, utilizing techniques such as Ultrasonic Pulse Velocity (UPV) testing and Cathodic Protection (CP) testing to guarantee long-term durability and reliability.
BUOY AND NAVIGTAIONAL AIDS MAINTENANCE
We provide comprehensive Annual Maintenance Contracts (AMC) for channel buoys, marker buoys, and fairway buoys to ensure seamless navigational aid. Our services include the retrieval, development, and maintenance of solar lanterns installed on navigational buoys, enhancing their efficiency and sustainability. Additionally, we specialize in leading, breakwater, and jetty light maintenance, ensuring optimal functionality and safety.
Our expertise extends to fender maintenance, including removal and refixing for secure mooring operations. As an authorized manufacturer of Wave Powered Navigational Buoys (WPNB) under the “Make in India” initiative in collaboration with NIOT, we deliver innovative and reliable solutions tailored to modern maritime requirements.
OFFSHORE DIVING PROJECTS
Our expertise encompasses a wide range of underwater services tailored for critical infrastructure projects. We specialize in intake and outfall pipeline laying for thermal power and desalination plants, ensuring precise alignment and functionality. Our capabilities include underwater repair and maintenance of pipelines, employing advanced techniques such as geo-textile wrapping to enhance durability. We also excel in fixing pipelines into exact underwater trenches for optimal positioning.
Additionally, we provide underwater cable laying and burying, extending up to 200 meters from shore and securely placing cables one meter below the seabed. Our services extend to inspection, maintenance, and repair of offshore structures, as well as Single Point Mooring (SPM) maintenance and repair for seamless operations. We conduct specialized diving work at atomic power plants and perform PLEM inspections for chemical plants to ensure safety and efficiency.
To support these operations, we collaborate with premier institutions in Chennai for design, drawings, and bathymetry surveys, delivering cost-effective and reliable solutions tailored to project requirements.
HYDRAULIC EQUIPMENTS
- Ship Hydraulic Equipment and Cranes
- Industrial Hydraulic Equipment’s
- Hydra Crane System
- Hydraulic Equipment Design Development
- Fabrication for Special Purpose
- Hydraulic Pumps and Motors
- All Hydraulic Equipment Refurbishment and Sales
HYPERBARIC INTERVENTION SUPPORT SERVICES
- Compressed Air Work EPB-TBM
- TBM Air Lock and Support Personnel
- Hyperbaric Intervention Equipment’s Maintenance
- Medical Locks -DDC Supply and Maintenance
- CAW Worker and Training Awareness
- Hyperbaric Workers and Mechanics
- Compression and Decompression for CAW Workers
ACHIEVEMENTS
Our expertise in underwater engineering and marine construction is showcased through a diverse range of projects. For the VA Tech Wabag 100 MLD Desalination Plant in Nemili, Chennai, we successfully handled the sinking, live tracking, and positioning of intake and outfall HDPE pipelines measuring 1600/750mm in diameter and 1050/1200 meters in length for Metro Water. We also completed the diffuser installation for the Sea Water Intake Well for Coastal Energen in Tuticorin.
Our capabilities extend to underwater cable operations, where we executed the laying and burying of cables 200 meters from the shore and 1 meter below the seabed for both TYCO-VSNL and Reliance Jio-MCC underwater fiber optic projects. Following the devastating Vardha Cyclone, we played a crucial role in re-positioning channel buoys for vessel movements, enabling port operations to resume within 24 hours.
Innovative techniques are at the core of our services. We utilized “Cofferdam” technology to insert permanent fixtures on a ship’s hull without the need for dry docking. In another challenging operation, a damaged pile under a wharf, measuring 1300mm in diameter with a steel liner of 10mm thickness and weighing 22 metric tons, was precisely cut using “Diamond Chain Sawing Technology” at a depth of 12 meters and removed as a single piece. Additionally, our team successfully retrieved a ship’s anchor along with 300 meters of chain and re-fixed it to the ship without external crane assistance after the tsunami.
These projects highlight our commitment to delivering innovative, efficient, and timely solutions in complex marine environments.
GENERAL TERMS & CONDITIONS FOR DIVING OPERATIONS
1. Scope of Services
The Contractor shall perform underwater diving services including inspection, cleaning, maintenance, repair assistance, installation, recovery, or related marine works as mutually agreed.
The scope of work must be clearly defined at the time of enquiry and confirmation.
Any additional work requested during execution shall be treated as extra and charged separately upon mutual agreement.
2. Nature of Operations
Diving operations are subject to marine, environmental, and operational uncertainties, and shall be executed based on prevailing site conditions, safety considerations, and feasibility.
3. Working Hours
All diving operations shall be restricted to daylight hours only, considering:
Underwater visibility limitations
Safety requirements
Port authority rules and advisories
No operations shall be carried out during night unless specifically agreed in writing and permitted by authorities.
4. Vessel Readiness & Operational Conditions
The Client shall ensure that the vessel is made available in a safe, stable, and obstruction-free condition for diving operations.
The following activities shall not be carried out simultaneously:
Ballasting or deballasting
Vessel shifting or maneuvering
Nearby vessel movements affecting diver safety or visibility
Any delay, inefficiency, or inability to execute work due to the above conditions shall be solely at the Client’s account.
5. Equipment & Technical Limitations
The Contractor shall deploy suitable diving equipment maintained as per industry practice.
However, in the event of equipment malfunction, breakdown, or unforeseen technical issues, the Contractor shall not be held responsible for delays or incomplete execution arising therefrom.
Necessary time for repair, replacement, or mobilization shall be accommodated.
6. No Cure – No Pay
The Contractor does not accept any work on a “No Cure – No Pay” basis.
All services rendered, including mobilization, diving attempts, and partial execution, shall be fully chargeable as per agreed terms.
7. Completion Criteria
The job shall be considered completed when the agreed scope of work is executed to the extent reasonably possible under prevailing conditions.
Absolute or ideal results are not guaranteed due to underwater and environmental limitations.
8. Payment Terms
Payment shall be made in full as per agreed quotation/contract, irrespective of:
Partial completion due to site conditions
Environmental or operational limitations
Technical constraints encountered during execution
Additional work shall be invoiced separately.
9. Safety & Compliance
All diving operations shall be carried out in accordance with standard safety practices and applicable port regulations.
The Contractor reserves the right to suspend or stop operations if conditions are deemed unsafe.
10. Limitation of Liability
The Contractor shall not be liable for:
Delays or inability to complete the job due to site constraints
Equipment malfunction or breakdown
Any indirect or consequential damages
The Contractor’s liability, if any, shall be limited to the value of the contract.
11. Indemnity
The Client agrees to indemnify and hold harmless the Contractor, its personnel, and agents against any:
Claims
Damages
Losses
arising from:
Vessel conditions
Concurrent operations onboard
Instructions or requirements imposed by the Client
12. Force Majeure
The Contractor shall not be responsible for delays or non-performance due to events beyond control, including:
Weather and sea conditions
Port or regulatory restrictions
Safety risks
Acts of God or unforeseen circumstances
13. Governing Law & Jurisdiction
This Agreement shall be governed by the laws of India, and any disputes shall fall under the jurisdiction of courts in Chennai, Tamil Nadu.
14. Acceptance
By issuing a Work Order / Purchase Order / Confirmation, the Client:
Accepts all terms and conditions stated herein
Confirms that the scope of work is clearly understood
Agrees to payment obligations irrespective of operational challenges
TERMS & CONDITIONS FOR UNDERWATER BLANKING / PLUGGING OPERATIONS
1. Scope of Work
The diving team shall carry out underwater blanking and/or plugging arrangements for sea chests, overboard lines, or similar openings to facilitate internal maintenance activities such as valve repairs, inspections, filter maintenance, or related works.
2. Purpose & Clarity of Requirement
The intended purpose of blanking (i.e., nature of internal work to be carried out onboard) must be clearly defined at the enquiry/quotation stage.
The effectiveness and suitability of the blanking arrangement depend on the specific operational requirement communicated by the client.
3. Nature of Blanking / Plugging
Underwater blanking and plugging are temporary and assistive measures.
These are intended to reduce or control water ingress, and not to achieve complete watertight isolation.
4. No Guarantee of 100% Watertight Sealing
The diving team does not guarantee 100% watertight blanking under any circumstances.
Water ingress may occur due to factors including, but not limited to:
Hull surface irregularities or damage
Marine growth, scaling, or coating condition
Improper seating or alignment of blank plates
Vessel draft and hydrostatic pressure
Structural condition of sea chest gratings
Accessibility and underwater working limitations
Cross-connections within the system, including other sea suctions, general service lines, fire lines, pumps, or interconnected pipelines
The client acknowledges that complete stoppage of water flow cannot be assured.
5. Suitability for Internal Works
The blanking/plugging arrangement shall not be considered suitable for operations requiring completely dry conditions.
Any internal work carried out shall be at the client’s discretion and responsibility.
6. Vessel Readiness & Operational Conditions
The vessel must be made available in a stable and suitable condition for diving operations.
No simultaneous activities should hinder the work, including:
Ballasting or deballasting operations
Vessel shifting or movement
Nearby vessel movements affecting safety or visibility
Any delay or reduced effectiveness arising from such conditions shall be outside the diving team’s responsibility.
7. Diving Working Hours
Diving operations shall be restricted to daylight hours only, in line with:
Underwater visibility constraints
Port authority regulations and safety advisories
8. Fabrication & Fitment Responsibility
Proper shaping, bending, and contour matching of blank plates to suit the hull profile shall be:
Provided by the client/vessel, or
Based on details furnished by the client
The diving team is not responsible for ineffective sealing due to improper fabrication or contour mismatch.
9. Contingency Measures
If blanking plates do not adequately reduce water ingress, additional measures such as:
Internal access
Wooden plugging
may be attempted.
However, the effectiveness of such measures is not guaranteed.
10. Completion Criteria
The job shall be considered completed when:
Blanking/plugging arrangements are installed as per agreed scope, and
Reasonable efforts have been made to minimize water ingress
Zero leakage or dry conditions are not criteria for completion.
11. Payment Terms
Payment shall be made in full as per agreed quotation, irrespective of:
Presence of water ingress
Inability to achieve complete sealing
The limitations of underwater blanking shall not be grounds for payment withholding or dispute.
12. Liability Limitation
The diving team shall not be held liable for:
Ineffectiveness of blanking due to system design or vessel condition
Delays or complications in internal operations
Any consequences arising from water ingress
All operational risks post-blanking remain with the client/vessel.
13. Client Acknowledgment
By awarding the job, the client confirms that:
They understand the limitations of underwater blanking/plugging
They accept that 100% sealing cannot be guaranteed
They agree that payment obligations remain unaffected
14. General Clause
These terms shall apply to all underwater blanking and plugging operations unless otherwise agreed in writing.