W.I.B.O.N. (Whether in berth or not) is a term often used in shipping contracts, particularly in charterparty agreements. It specifies that the chartering of the ship takes effect regardless of whether the ship is currently in berth or not. This clause is important for the shipowner and the charterer as it impacts the commencement of laytime—the period during which the charterer is allotted to load or unload the cargo. Essentially, this term helps define when charges, responsibilities, and risks start transferring from the shipowner to the charterer.

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