Scribd
Upload
180 views2 pages

In Water Survey IWS-WPS Office

The In Water Survey (IWS) can replace the intermediate docking between Special Surveys for ships with an IWS notation, providing essential information typically gathered during a Docking Survey. The IWS must be conducted by a qualified diver in suitable conditions, and if damage is found, dry-docking may be required for further inspection. Additionally, specific details regarding rudder and stern bush clearances must be submitted to maintain the IWS notation.

Uploaded by

Subhasis Bhattacharya
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
180 views2 pages

In Water Survey IWS-WPS Office

The In Water Survey (IWS) can replace the intermediate docking between Special Surveys for ships with an IWS notation, providing essential information typically gathered during a Docking Survey. The IWS must be conducted by a qualified diver in suitable conditions, and if damage is found, dry-docking may be required for further inspection. Additionally, specific details regarding rudder and stern bush clearances must be submitted to maintain the IWS notation.

Uploaded by

Subhasis Bhattacharya
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
You are on page 1/ 2

In Water Survey (IWS)

The CLASS will accept an In water Survey in lieu of the intermediate docking between Special Surveys
required in a five year period on ships where an *IWS notation is assigned.

The In water Survey is to provide the information normally obtained from the Docking Survey. Special
consideration shall be given to ascertaining rudder bearing clearances and stern bush clearances based
on the operating history, on board testing and stern L.O. analysis.

The In water Survey is to be carried out at an agreed geographical location, with the ship at a suitable
draught in sheltered waters and with weak tidal streams and currents. The in water visibility is to be
good and the hull below the waterline is to be clean.

In Water Survey (IWS) Requirements

Prior to commencing the In water Survey, the equipment and procedures for both observing and
reporting the survey are to be agreed between the Owners, Surveyor and diving firm. In water Survey is
to be carried out by a qualified diver of a firm approved by the Class. If the In water Survey reveals
damage or deterioration that requires early attention, the Surveyor may require that the ship be dry-
docked in order that a fuller survey can be undertaken and the necessary work carried out.

Where a vessel has an *IWS notation, the conditions of the high resistant paint is to be confirmed at
each dry-docking in order that the *IWS notation can be maintained. Where an *IWS (In water Survey)
notation is to be assigned, plans and information covering the following items are to be submitted:

Details showing how rudder pintle and bush clearances are to be measured and how the security of the
pintles in their sockets is to be verified with the vessel afloat.

Details showing how stern bush clearances are to be measured with the vessel afloat.

Details of high resistant paint, for information only.

Where an *IWS notation is to be assigned, means are to be provided for ascertaining the rudder pintle
and bush clearances and for verifying the security of the pintles in their sockets with the vessel afloat.
Where an *IWS (In water Survey) notation is to be assigned, means are to be provided for ascertaining
the clearance in the stern bush with the vessel afloat.

You might also like