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Surveys & Inspections

of GRP, Wood, Steel and Aluminium Vessels

Surveys and Inspections of GRP, Wood, Steel and Aluminium Vessels

Surveys & Inspections

of GRP, Wood, Steel and Aluminium Vessels

Surveys and Inspections of GRP, Wood, Steel and Aluminium Vessels

Case study: Steel Yacht

The following defects were noted on a Steel Yacht:

  • Ultrasound Thickness Testing indicates that the original nominal thickness of the hull plating is thinner than that specified by the designer, and that the plates are of varying thickness with corresponding plating on the port and starboard sides not being consistent. It would appear that the hull has been built out of whatever steel plate that was to hand.
  • The protective paint coating below the waterline is breached in places and there is deep corrosion pitting to the plating at these points.
  • Internally there is heavy corrosion to a number of the steel floors and the adjacent plating where water has been lying in the bilge.
  • Welding between the hull/deck plating and internal stiffeners is poor in places and there are a number of cracks where the weld has failed.
  • Unsuitable plastic through hull fittings have been used below the waterline two of these are cracked and ready to fail. As there are no seacocks on these fittings, the integrity of the hull is reliant on the attached hoses and hose clips, which are in a poor condition.
  • Due to the skeg being fabricated from thin walled steel section it is insufficiently stiff and the rudder can be easily bounced out of its bottom bearing welded to the skeg.
  • The aluminium mast has an open crack of over 1m running up from deck level rendering the mast unsafe and likely to fail under a modest load. The crack has been concealed behind a plastic cable conduit attached to the mast with silicon sealant.
  • The anchor warp is in a much degraded condition and likely to fail in use, the bitter end is not attached.
  • The hydraulic steering is almost seized.
  • The fuel supply pipe is damaged and leaking and the fuel shut off valve is seized.
  • Neither of the two bilge pumps are operational.
  • The gas system is in a very dangerous condition and will require replacing, the gas had been left on at the canister and the boat had to be vented prior to the survey as when it was checked for leaking LPG with a hand held detector at the start of the survey, gas levels above 20% LEL (Lower Explosive Limit), were detected.
  • The boat has a 230volt shore power socket in the cockpit. DO NOT plug into this socket as the cable leading from it runs down into the bilge and ends in a connector block submerged in bilge water.
  • All fire extinguishers are 15 years or more beyond the expiry date marked on them.
  • No safety equipment was found on board.
  • Plus a number of less serious defects.
Vessel 2: Wooden Motor Yacht »