In commercial
ship chartering, demurrage is an ancillary cost that represents
liquidated damages for delays. It occurs when the vessel is prevented from loading or discharging cargo within the stipulated
laytime (see
affreightment: under Charter-parties). Laytime applies to both
liner shipping and
tramp shipping. In the oil industry, it refers to the excess time taken to discharge or load, as the case may be, in excess of the allowed laytime. Laytime is the term used to quantify the time allowed within which an operation is allowed to be made. Demurrage is laytime consumed less laytime allocated (if any). The
master of the ship must give a
Notice of Readiness (NOR) to the
charterer when the ship has arrived at the port of loading or discharge. The NOR informs the charterer that the ship is ready to load or discharge. The date and time of the NOR determines when laytime is to commence. At the end of the stay in port, the
port agent draws up a
Statement of Facts, setting out a log of events during the ship's stay in port. The Statement of Facts enables a time sheet to be drawn up and signed by the master and the shipper or receiver of the cargo. The time sheet enables laytime and therefore demurrage or despatch to be calculated. The demurrage fee is often a daily amount agreed between charterers and ship owners. Ideally, the demurrage fee (per day in US dollars) covers the daily time charter rate, daily voyage costs, and the ship owner's risk premium. == Container haulage ==