Ship Speed Control to Minimize Fuel Consumption…IV : Speed Error due to Current and Fouling
速力制御による燃料節約…IV : 海流と汚損の影響

Minoru HIROTA, Shigetaka NAGANO
1984 The Journal of Japan Institute of Navigation  
In planning a sailing schedu ! e to minimize fuel consumption of a ship , we 皿 ust esti 皿 ate currents , the effects of fouling , winds and waves . One of the good ways fQr this purpose is to analyse the abstract lQgbook of a ship running the same route many times . Ship speed over ground V 。 is affected by many factors . We assume the following equation concerning Abstract logbooks from three tankers sailing between Japan −・ Persian Gulf are analysed . Then , A : negligible , B ≒ − O . 3 '
more » ... ing eff t is O . 4 ' Nl . 3 ' speed dQwn per year , and strong wind effect is 1, 3 ' -2 . 2 「 speed do . The anual mean 冨 ≒ 0. 1 / is estimated from current chart . The root mean square of
doi:10.9749/jin.71.167 fatcat:5bdp2norprds7mgmipwn4hyun4