Default Environmental Coefficients

Default wind, current and regular wave drift coefficients are included in the program for supply, drill and tanker vessels. The wind data is taken from References 54 and is shown in Wind Coefficients 1-6 diagrams at two representative draughts. The current data, which has been calculated from methods given in, References 55, is shown in Current Coefficients 1-3 diagrams. Regular default wave drift coefficients are also available for each class of vessel. The supply and tanker data is based on available data within BMT, whilst the drill data is based on References 56. The integrated mean wave drift forces are shown in Mean Wave-Drift Coefficients 1-3 diagrams for Supply, Drill and tanker vessel types.

Wind Coefficients 1 - Default Data - Supply Vessel 2AL/Lpp2 = 0.167

Wind Coefficients 2 - Default Data - Supply Vessel 2AL/Lpp2 = 0.191

Wind Coefficients 3 - Default Data - Drill Vessel 2AL/Lpp2 = 0.097

Wind Coefficients 4 - Default Data - Drill Vessel 2AL/Lpp2 = 0.162

Wind Coefficients 5 - Default Data - Tanker 2AL/Lpp2 = 0.089

Wind Coefficients 6 - Default Data - Tanker 2AL/Lpp2 = 0.143

Current Coefficients 1 - Default Data - Supply Vessel (Deep Water)

Current Coefficients 2 - Default Data - Drill Vessel (Deep Water)

Current Coefficients 3 - Default Data - Tanker (Deep Water)

Mean Wave-Drift Coefficients 1 - Default Data - Supply Vessel

Mean Wave-Drift Coefficients 2 - Default Data - Drill Vessel

Mean Wave-Drift Coefficients 3 - Default Data - Tanker