9. Cable or pipe-laying activities, the towing of large submerged objects for research or exploration purposes, the employment of manned or unmanned submersibles, or other underwater operations constituting potential dangers in or near shipping lanes
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Statutory Documents - IMO Publications and Documents - Circulars - Maritime Safety Committee - MSC.1/Circular.1310 – Revised Joint IMO/IHO/WMO Manual on Maritime Safety Information (MSI) – (8 June 2009) - Annex - 7 – Guidance and Examples for Navigational Warnings by Type of Hazard(as Listed in 4.2.2) - 9. Cable or pipe-laying activities, the towing of large submerged objects for research or exploration purposes, the employment of manned or unmanned submersibles, or other underwater operations constituting potential dangers in or near shipping lanes

9. Cable or pipe-laying activities, the towing of large submerged objects for research or exploration purposes, the employment of manned or unmanned submersibles, or other underwater operations constituting potential dangers in or near shipping lanes

 The text of a navigational warning in this category shall contain message elements 1, 2, 3, 5, 6, 7, identified and ordered, as in Message Elements Table Figure 3.

Standard Remarks Comments
CABLE LAYING OPERATIONS IN PROGRESS  
SEISMIC SURVEY IN PROGRESS  
UNDERWATER OPERATIONS Do not use “SUBMARINE OPERATIONS”
SCIENTIFIC OPERATIONS IN PROGRESS  
   

Note i) Regular communications should be undertaken with the operators to ensure that the message is cancelled promptly as soon as the operation has been completed. Particular care should be taken when considering including a cancellation time or date for this category of message due to the many factors which could effect the completion of the operation.

Note ii) Use “REQUESTED” when wide berth is for the benefit of the ship which is performing the operation.

Note iii) Use “ADVISED” when the operations create a significant hazard.

   
EXAMPLES OF WARNINGS IN SECTION 4.2.2.9
   
Parent topic: 7 – Guidance and Examples for Navigational Warnings by Type of Hazard(as Listed in 4.2.2)
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