Launching a ship signifies the pivotal moment when it transitions from the construction phase to the navigation phase, marking a ceremonial milestone in the shipbuilding process. However, this ceremonious event demands meticulous planning, precise calculation, and careful execution to ensure safety, stability, and the successful descent of the vessel into the water. The focal point of this master's thesis was the longitudinal launch of a ship, a specific method in which the ship is lowered into the water along its longitudinal axis. The analyzed case study pertained to Ship 527, constructed in the 3. Maj Shipyard. In the calculation process, advanced software, "NAPA," was employed to determine the draft at the bow and stern, taking into consideration the distance covered, the buoyancy of the ship, and the position of the center of buoyancy. Simultaneously, a detailed examination of the moments of buoyancy and weight concerning the end of the slipway was conducted. The planning phase encompassed a strategy for balancing ballast to secure optimal stability and control during the launch. Significant attention was devoted to the strategy for turning the ship. Emphasis was placed on minimizing resistance during turning and achieving a longer trajectory before the actual turn. To realize this, comprehensive plans for additional reinforcements at the bow of the ship were developed to safeguard structural integrity during critical turning moments. The outcomes of the calculations yielded invaluable insights into the distribution of pressure on the keel at rest and pressures on the bow and stern sections of the slipway during the launch. These data are pivotal for formulating precise slipway lubrication plans to ensure optimal performance during the launch. In conclusion, launching a ship is a ceremonial moment requiring meticulous planning and calculation to guarantee the safety and success of this pivotal step in the shipbuilding process. This master's thesis provides a deeper understanding of longitudinal ship launching and offers guidance for enhancing the safety and efficiency of this significant procedure. With proper equipment preparation and precise execution of the steps, the launch ceremony can be observed with confidence and assurance, symbolizing the successful transition of the vessel from the shipyard to the sea.