When a cargo ship sets sail, it requires adequate depth of water to navigate safely. The draft of a cargo ship refers to the distance between the waterline and the bottom of the hull. The draft can vary greatly depending on the ship’s size and cargo load.
A typical Panamax container ship may have a draft around 35 feet. This means the water depth must be at least 35 feet for the ship to sail without running aground. However, when carrying heavy cargo, the draft could increase to 40 feet or more.
The cargo being transported also impacts the draft. Dense cargo like coal can significantly increase the draft compared to lighter items like containers.
Sea conditions matter as well. In rough seas, waves may temporarily reduce the water depth below the keel. This is why the draft is different than the minimum depth required.
Cargo ships use navigational charts that show water depths throughout their routes. This allows captains to plan trips ensuring sufficient clearance below the hull at all times.
If a ship strays outside the charted depths, it risks striking the seafloor, damaging the vessel and cargo. Careful attention to draft and under keel clearance is crucial for safe ocean navigation.
