This data category is used to input the hull drag coefficients and thruster forces, for each structure.

The hull drag coefficients are input for a defined number of wave directions. Coefficients can be input for all 6 degrees of freedom. The coefficients are divided into two distinct categories. The first relates to the forces on the submerged part of the hull, due to current, and the second relates to the forces on the freeboard section of the hull and superstructure, due to wind.

Up to 10 thruster forces and their positions may be specified, for each structure. These forces are assumed to be constant in magnitude throughout the analysis.

The coefficients applicable to the following programs:

Aqwa-Fer: Used only to calculate the drift frequency motions in the frequency domain. N.B. they are NOT applicable for wave frequency motion

Aqwa-Drift: Used to calculate the drift frequency motion in the time domain.

Aqwa-Line: Not applicable

Aqwa-Librium: Used to calculate dynamic stability of drift frequency motion and forces contributing to the static equilibrium position.

Aqwa-Naut: Used to calculate motions in the time domain