An average current velocity (Vc) shall be used to compute forces and moments. If the current velocity profile is known, the average current velocity can be obtained from the following equation:
|Vc||=||average current velocity (knots)|
|T||=||draft of vessel|
|vc||=||current velocity as a function of depth (knots)|
|s||=||water depth measured from the surface|
If the velocity profile is not known, the velocity at a known water depth shall be adjusted by the factors provided in Figure 31F-3-2 to obtain the equivalent average velocity over the draft of the vessel.