How To Calculate An Increase In Draft

What is the increase of draft in a ship of 78 feet beam when heeled to an angle of 8°?

Given:

            Beam = 78 ft
Angle of heel = 8°

What is asked:

                      Increase in ship's draft

Solution:

We have to divide the beam by 2 and then multiply result to the sine of the angle of heel. This is the formula in calculating draft increase.

Draft Increase = Beam  × Sin θ°

                             2

                       = 78 ft  × Sin 8° 

                           2 

                       = 39 ft × 0.13917

                       = 5.43 ft

Draft Increase