Summary of Por que tem essa água saindo do navio?

00:00:00 - 00:10:00

The video "Por qué tem essa água saindo do navio?" explains the reason behind ships carrying water in their tanks before departure. This water, known as ballast water, is crucial for maintaining the stability of the ship and preventing excessive rolling or tipping. It is used in platforms like oil rigs and submarines as well. The video also explores the role of water as ballast in a ship and the use of buoyancy tanks in boats and ships. By controlling the buoyancy of these tanks, the boat can be made to float at a desired depth, and in emergency situations, snorkels and compressed air can be used to help the boat float back up to the surface.

• 00:00:00 In this section, the video explains why ships carry water in their tanks before setting sail. Around one-third of all containers transported on ships worldwide are empty, as many ships return from their destinations either with little or no cargo. However, these ships do not travel completely empty. Instead, they fill their tanks with seawater, known as ballast water, before departure. This water is crucial for maintaining the stability of the ship and is also used in platforms like oil rigs and submarines. It ensures that the ship remains balanced and prevents excessive rolling or tipping. The video emphasizes that this system of using ballast water has evolved over time and is essential for enabling the transportation of various goods across the globe.
• 00:05:00 In this section, the video explores the role of water as ballast in a ship. According to the video, "water as lastro" allows for balancing the weight of the cargo and distributing it evenly across the ship. This is done by bombing water into the tanks located throughout the ship. As cargo is unloaded, the water is pumped from the tanks and replaces the weight of the cargo. The water also compensates for any uneven weight distribution, making the ship's center of gravity stable. Water is also used to control the position of the ship's center of gravity. The video also explains the role of the lastro in controling the vessel's position by connecting with the propeller and increasing the torque to the propellers, maintaining a stable weight balance, and aimed at ensuring the ships stability in calm sea.
• 00:10:00 In this section of the video, the speaker discusses the use of buoyancy tanks in boats and ships. The tanks are filled with air to make them lighter and more buoyant, allowing the boat to float on water. The tanks have an opening on top and bottom that can be opened and closed to control the amount of water and air in the tank. By controlling the buoyancy of the tanks, the boat can be made to float at a desired depth. The speaker also discusses the use of snorkels and compressed air in emergency situations to help the boat float back up to the surface.