certain cargoes always attract thieves. Notable items include spirits, beer, tobacco or high value small items. To reduce losses such cargoes should be tallied in and tallied out. Lock-up stow should be provided throughout the voyage from the onset of loading to the time of discharge. Shore watchmen and security personnel should be used whenever it is practical and good watch-keeping practice should be the order of the day. … [Read more...]
Proof load
that tonnage value that a derrick or crane is tested to. The value is equal to the SWL of the derrick/crane + an additional percentage weight allowance, e.g. derricks less than 20-tonne SWL proof load is 25% in excess; derricks 20-50-tonne SWL proof load equals - 5 tonnes in excess of SWL; derricks over 50-tonne SWL proof load equals 10% in excess of SWL. … [Read more...]
Permanent Ballast
Ballast carried in ship’s tanks that were designed to carry nothing else. … [Read more...]
Particularly Sensitive Sea Area (PSSA)
An area that needs special protection through action by IMO because of its significance for recognised ecological, socio-economic or scientific attributes where such attributes may be vulnerable to damage by international shipping activities. … [Read more...]
Pick Report
Also referred to as a chart query, cursor enquiry or selection of a chart symbol. This is used on an ENC to obtain more detailed information which may be considered necessary for safe navigation. … [Read more...]
Pilotage Exemption Certificate (PEC)
In pilotage waters, an exemption certificate may be granted based on compliance with specific local criteria. … [Read more...]
Purging
The introduction of inert gas into a tank already in the inert condition with the object of:further reducing the existing oxygen content; and/or reducing the existing hydrocarbon gas content to a level below which combustion cannot be supported if air is subsequently introduced into the tank. … [Read more...]
Pressure/vacuum relief valve
A device which provides for the flow of the small volumes of vapour, air or inert gas mixtures caused by thermal variations in a cargo tank. … [Read more...]
Pressure surge
A sudden increase in the pressure of the liquid in a pipeline brought about by an abrupt change in flow rate. … [Read more...]
Pour point
The lowest temperature at which a petroleum oil will remain fluid. … [Read more...]