How are we tracking vessels in the Strait of Hormuz?

By Kayleen Devlin Since the start of the war on 28 February, BBC Verify has tracked 392 vessels transiting the Strait of Hormuz using data provided by maritime intelligence firm MarineTraffic. Large vessels are fitted with an Automatic Identification System (AIS), which uses GPS to determine and broadcast their location in near real time. However, there are limitations to what we can say from AIS alone, as ships can switch it off entirely or deliberately obscure their positions to appear like th