Where are the sections in a ship that are examined for longitudinal strength calculation and why

The sections in a ship that are examined for longitudinal strength calculation are generally located in the midship region, which is the area of the ship that experiences the greatest stress and strain due to wave action. This is because the midship region is where the hull is at its widest and the longitudinal bending moments are at their maximum.

The sections that are examined include the deck, bottom shell, longitudinal bulkheads, and the side shell. These sections are critical to the longitudinal strength of the ship and are designed to withstand the bending and torsional forces that are imposed on the ship during operation.

By examining these sections, naval architects and engineers can calculate the longitudinal strength of the ship and ensure that the ship is designed to withstand the stresses of normal operation as well as extreme weather conditions. This is essential for ensuring the safety and reliability of the ship, crew, and cargo