SILnivået

**SILnivået**

SILnivået, eller *Standard International Level*, is a standardized measurement system used primarily in the maritime industry to describe the depth of water in relation to a vessel’s draft. It is derived from the International Hydrographic Organization’s (IHO) standards and is widely adopted in navigation charts, pilotage, and maritime regulations. The SIL is calculated based on the vessel’s maximum permitted draft, which is defined by the International Convention on Load Lines (1966) and subsequent amendments.

The SIL is expressed as a numerical value, typically rounded to the nearest whole number, and represents the maximum depth at which a vessel can safely operate under standard conditions. For example, if a ship has a draft of 10 meters, its SIL might be 12 meters, indicating it can navigate in waters up to that depth without exceeding its load line. This system ensures compliance with safety and environmental regulations, particularly concerning ballast water and structural integrity.

In practice, SILnivået is used alongside other navigational aids such as tide tables and local water depth charts to determine safe operating limits. It also plays a role in assessing vessel performance under varying conditions, including seasonal changes in water levels. While primarily a technical specification, the SIL contributes to maritime safety by preventing overloading and ensuring vessels remain within legal and operational limits.