Pitching
Pitching may refer to the following:
Aerospace
Pitch caused by the elevator to the tail of the aircraft
In aeronautics, it is controlled by a push or pull on the handle. The handle in turn control the deflection of the elevator located mostly on the back of the device. These governments are aerodynamic surfaces that generate the force necessary to pitch in the rotation.
The ship tilts forward, then backward around its equilibrium position (plate). This is a movement of periodic change in attitude.
Causes
This movement is due to sea conditions, the vessel meets the wave that carries him on an effort in which a component can be vertical upward, and the other surrounds the stem, causing therefore a increase the thrust of Archimedes. The vessel being rigid, if the front moves, the rear emerges. All this affects the longitudinal stability of the vessel and tends to perpetuate the rocking motion.
In a little more precise, the vertical loads due to waves on the hull, creating a time which varies with time. If the waves are not crossed, this time includes a variable component about an axis passing through the centre of gravity. This is what is causing the pitch.