WATCH -The day at sea is divided into six four hour periods. Three groups of watchstanders are on duty for four hours and then off for eight, then back to duty. Seamen often work overtime during their off time.

WEATHER PERMITTING- That time during which weather that prevents working shall not count as laytime

WIBON- Whether in berth or not

WORLDSCALE- An index representing the cost of time chartering a tanker for a specific voyage at a given time. The index is given at Worldscale 100, which represents the price in dollars per ton for carrying the oil at that rate. The negotiated rate will be some percentage of the index value.

FOR EXAMPLE:

W1OO on the voyage Ras Tannura - Rotterdam (Cape-Cape) =
$31.16/ton of oil
W25 = 25% of W1OO
W25 = $7.79/ton of oil
N.B. rates may be above as well as below W1OO

WW- Weather working