Maritime & Chokepoints

Automatic Identification System AIS

AIS (Automatic Identification System) is the transponder standard that broadcasts a ship’s identity, position, and course, and is the primary data source for tracking vessel traffic through chokepoints.

The Automatic Identification System (AIS) is a maritime transponder standard that continuously broadcasts a vessel’s identity, position, speed, and course. It exists for collision avoidance, but it also makes near-real-time ship tracking possible for anyone receiving the signals.

WorldMonitor uses AIS positions to watch tanker and cargo movement inside chokepoint bounding boxes, detect congestion, and flag disruptions such as coverage gaps. Because AIS can be switched off or spoofed, sudden gaps are themselves treated as a signal worth surfacing.

Related terms

Maritime Chokepoint

A maritime chokepoint is a narrow passage through which a large share of global trade, energy, food, or military movement must pass, so a disruption there removes optionality from the whole system.

Chokepoint Congestion

Chokepoint congestion is an above-normal build-up of vessel traffic waiting to transit a strait or canal, detected from AIS activity and used as an early sign of disruption.

Strait of Hormuz

The Strait of Hormuz is the maritime chokepoint between the Persian Gulf and the Gulf of Oman through which a large share of the world’s seaborne crude oil and LNG must transit.

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