Ventilation. Cargo damage due to climatic conditions includes such effects as mould formation, germination of grain, corrosion and rust on metals, and wetting of sensitive materials such as leather. The general cause of such damage is condensation from various sources.

WIFPON (Whether In Free Pratique Or Not). In a berth charter, notice of readiness can be tendered even if the ship has not arrived in the destination berth, which may be unavailable.

Working Time Saved (WTS). If the cargo operations are completed within the laytime allowed to the charterer, despatch can become payable to him. The despatch clause in the charterparty specifies how this despatch is to be calculated.

Voyage policy. A contract to insure the subject-matter “at and from” or from one place to another or others (section 25 (1) of the Marine Insurance Act 1906, e.g., “from Liverpool to Hong Kong” (Cargo is generally insured under a voyage policy and ships under a time policy although both type of policy are equally applicable to cargo and ships. Voyage policies can be used for hulls, e.g., on delivery or scrapping voyages.)

Whether in port or not (WIPON). In the English Court of Appeal decision in The Kyzikos, 1987, which dealt mainly with the phrase "whether in berth or not", it was said:

WWR. When and where ready.This abbreviation may indicate the availability of a vessel.

Valued policy. Under section 27(2) of the Marine Insurance Act, this policy specifies the agreed value of the insured subject-matter, e.g., a policy of US$1 million on hull and machinery value at US$7 million. The agreed value may not be the actual value of the subject-matter.

Weather permitting. (w.p.)(Wp) Sometimes cargo operations cannot be carried out because of inclement weather, especially when foodstuffs, such as grain, are being handled.

Warehouse to warehouse cover. Marine insurance for goods covered the period from port-to-port without any cover during transit to the loading port.

Weather working day (WWD). This is defined in the Charterparty Laytime Definitions 1980 as: ". . . a working day or part of a working day during which it is . . . possible to load/discharge the cargo without interference due to the weather.

Without guarantee (W.O.G.) If a statement is made either during negotiations or in a charterparty and it is qualified with the words (or abbreviation) this indicates that the party using the qualification is not

WCCON (Whether Customs cleared or not). This phrase refers to the time when a notice of readiness can be tendered by the master of a vessel especially if the vessel has not reached its agreed destination if this is a berth (in a "berth charter") because this is unavailable.

Whether in berth or not (WIBON). This expression refers to the time when a notice of readiness can be tendered by the master.

Waybills. For ocean transport these can be called “Seawaybills” to distinguish them from commonly-used “Air waybills”.

War cancellation clause. The Institute War and Strikes Clauses (Hulls—Time) 1983 provide that: