BOSPHORUS

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A 27-kilometer strait through the heart of Istanbul, narrowing to 700 meters at its tightest point. Roughly 50,000 ships transit per year — 3% of global oil supply, plus the only sea route in or out of the Black Sea for Russia, Ukraine, Romania, Bulgaria, and Georgia. Movements regulated by the 1936 Montreux Convention.

This page is rebuilt every 2 minutes from public OSINT — OpenSky for aircraft, USGS for seismic activity, NASA EONET for natural events. No classified data, no paywall.