A mass of 10 tonnes is moved 20 m across the deck of an ocean vehicle of 10,000 tonnes displacement. The ocean vehicle has a rectangular tank 20 m long and 10 m wide containing sea water. The center of gravity of the vessel is 5 m above the keel and the transverse metacenter is 6 m above the keel. Calculate the angle of heel (inclination) if the tank is completely filled with sea water and there is no free surface in the tank.