The word popa comes from the Latin '' Puppis ''. Stern is the naval terminology that is attributed to the zone or area that is in the back of a boat where all the controls of a boat are located that is divided into three equal parts counting the front of a boat and thus avoid eddies and loss of energy.
In other words, the back part of a ship, boat or ship is called stern. According to the exterior shapes, the stern that depend on the sea conditions and the characteristics of the ship, where they also take the names of round, tugboat, standard, cruise, monkey's ass, etc.
It should be noted that we can find different types of stern that are flat stern, felucca, monkey-ass or fins, square or square, round, cruising and tug.
The felucca stern is the one that ends in the stern piece with a shape similar to the front part of the boat, but more curved and full at the top, leaving the articulated piece, made of wood or iron on the outside.
The square stern is the one with a flat transverse surface called a mirror, which comes out of the thick wood in the vertical position at the end of the stern and serves as a support for the armor of the part of the boat that shelters the articulated piece.
The cruising stern is the one that does not have launch on the waterline that presents a considerable inward turn, being able to obtain with it the finest lines of the stern structures and greater moment of the resistance of the floating gains great speed and great stability.
