Sea lanes of communication
Also called: SLOCs, Sea lines of communication · Topic: World Transport and Communication · NCERT: Beyond NCERT
Meaning
Sea lanes of communication (SLOCs) are the main sea routes that ships use to carry a region's trade, oil and gas. The word "communication" here is an old meaning: it refers to routes that link places, not to phones or data. Sea routes are the cheapest way to move heavy goods, so most foreign trade travels along a few busy lanes. These lanes often squeeze through narrow straits. If war, piracy or a blockage cuts a lane, trade slows, freight costs rise and energy supplies are at risk. That is why navies patrol and protect SLOCs.
Example
The SLOC through the Strait of Malacca links the Andaman Sea with the South China Sea. It passes close to India's Andaman and Nicobar Islands, near the Six Degree Channel. India's Andaman and Nicobar Command, its first integrated tri-service command (Army, Navy and Air Force under one command), sits next to these lanes and watches them. China depends heavily on this lane, a worry known as its "Malacca dilemma".
Don't confuse with
- Maritime chokepoint: a chokepoint is one narrow point on a sea lane, such as Hormuz or Bab-el-Mandeb. A SLOC is the whole route, and it may pass through several chokepoints.
- Submarine communication cable: a fibre-optic cable on the seabed that carries internet data. A SLOC carries ships and cargo, not data.