About us

SALVAGE:

In-Water INSPECTION:

In-Water CLEANING:

In-Water REPAIRS, MAINTENANCE:

CIVIL WORKS & ENGINEERING:

SEABED & EARTH ANCHORING:


Chance Civil Engineering


Williams Form Engineering Corporation

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Subsidiaries:

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Diving

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Maritime Information

ABC Diving® Ltd

Port Vila, P.O. Box 3242 VANUATU South Pacific

Complete Diving Services to Vessels & Civil Engineering Industry

We operate in north and south Pacific Islands; more specifically in Samoa, Fiji, New Caledonia, Vanuatu, Salomon, PNG...

Please, contact us for:

Underwater INSPECTION Diving: Why?

 

In compliance with all major classification societies, ABC Diving performs:

VESSELS and MARITIME INFRASTRUCTURES In-Water Inspections including Corrosion Inspections and General Surveys.

 

  • VESSELS:
    • On request of Shipowners, Surveyors, Insurers, Classification Society Inspectors
    • Pre-purchase, pre/post Charter, pre and post dry docking
    • Damage assessment
    • To locate and remove obstruction hazardous to vessels
    • Hull coating
  • MOORINGS
    • Owner peace of mind
    • Insurance requirement in case of claim
  • Maritime INFRASTRUCTURES:
    • New Construction or upgrading projects (wharves, jetties, seawalls, pipelines, etc..)
    • Damage survey report
  • WATERWAYS & HARBOR:
    • Clearance survey report (wrecks removal, dredging, etc....)

In general terms, PROGRAMMES are arranged so as to perform: 

  1. A GENERAL INITIAL SURVEY, before any cleaning, to see broadly if there is any obvious damage or problem.
  2. General tasks, such as SEABED surveys, MARINE GROWTH surveys and CORROSION inspection.
  3. Appropriate underwater CLEANING.
  4. CRITICAL Inspection tasks in likely areas, in relation to less obvious (or even invisible) defects. The most important of these is CRACKING. This critical inspection is to detect defects and then, if found, to accurately size them.

           

Visual Inspection

 

The bulk of inspection data is derived from visual inspection techniques. Visual inspection is used to inspect structures for obvious damage such as missing parts, dents, buckles and tears; and to observe and record underwater conditions and features.
Underwater visual inspection is carried out by the human eye, still photography and closed circuit television (CCTV) or video.
These methods are used in conjunction with verbal and written reports from the underwater inspector, who may be a diver or a ROV pilot. Both manned and Remotely Operated Vehicles are normally fitted with still and video cameras..

It must be remembered that visual inspection can only detect visible defects. While this seems obvious, cracking defects can be very difficult to find by visual methods (although once found they may then be able to be 'seen'), and may indeed be invisible to the naked eye or camera.

The various INSPECTION ACTIVITIES have a basic LOGICAL ORDER

Some tasks have to be done prior to cleaning, while others must be done afterwards. For example, most NDT cannot be performed before cleaning, while obviously a marine growth survey cannot be performed afterwards.

Once this is understood, the various inspection requirements of a client can be arranged so as to create the most efficient inspection programme.


The inspection is a complex subject, some aspects of which involve theories and formulae beyond the scope of this page. More detailed information may be obtained from other sources or Contact us.

You may be interested to know about: our video and still-photography equipment

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