Tides

Neap Tides: The opposite to Spring Tides (which see). Neap Tides occur when the tidal range is at its lowest – in other words during periods of relatively low high tides, and of relatively high low tides. A vessel that is prevented from berthing of from sailing with a full cargo or, in deed, is trapped in a berth by the onset of neap tides, is said to have been ‘neaped’ Nett Terms: Opposite to Gross Terms. Cargo-handling is the responsibility and for the account of the charterer or the cargo seller. NOR: Notice of Readiness: See Lesson Six. PPT: Prompt: Indicates that a cargo or a ship is available promptly ROB: Remaining On Board: Refers to cargo, bunkers or freshwater remaining on board a ship at any particular time RO/RO: Roll On/Roll Off: A term indicating that cargo is to be driven on at the loading port and driven off upon discharge – e.g.: a car carrier. Also used to describe a type of vessel specialising in such trades SA: Safe Anchorage SB: Safe Berth SHEX: Sundays and Holidays Excepted: Means that laytime will not count during Sundays or Holidays SHINC: Sundays and Holidays Included: Opposite to SHEX. Laytime counts during Sundays and Holidays, which are considered to be normal working days. Both SHEX and SHINC are often extended to cover Saturdays in which case they are written SSHEX or SSHINC as appropriate Sous Palan: Under Hook – cargo will be brought alongside the carrying vessel – i.e.: under her ‘hooks’ – free of expense to the cargo buyer or the carrier SP: Safe Port: Spot: Indicates that a ship or a cargo is immediately available Spring Tides: The height of a tide varies (being influenced by the phases of the moon). Approximately twice a month, tidal levels attain their highest high water and lowest low water marks, being termed Spring Tides. The difference between high and low water is called the tidal range and this range is therefore at its greatest during spring tide periods. Because of greater available drafts during spring tide periods, when ships can enter and leave around the high-water time more deeply laden than otherwise, some ports experience a far greater volume of traffic than normal, being termed Spring Tide Ports.