Hydromax has the option to apply hog or sag during the calculations.

Hog or sag is distributed in a parabolic curve centred at either the amidships location, or a specified longitudinal position relative to the zero point. This is called the “centre of deflection”.

When hog is specified the centre of deflection and frame of reference at that location remain stationary and the ends of the hull are deflected downward.

When sag is specified the centre of deflection and frame of reference at that location remain stationary and the ends of the hull are deflected upwards.

Note:

Hog and sag apply to all analysis modes including tank calibrations, which will vary slightly with changes in hog and sag.