Bosphorus Strait Trivia Questions

This is basic geography; the Bosphorus is the narrow waterway linking these two seas, splitting Europe and Asia.

Submarines must surface to transit the Bosphorus due to its shallow depth and heavy traffic, per Montreux Convention rules.

The Bosphorus rarely freezes due to strong currents; the last major freeze was in 1954, but it never fully iced over.

It sees about 48,000 ships per year, carrying oil and goods, making it a critical but congested maritime route.

A dense, salty undercurrent from the Sea of Marmara flows northward beneath the fresher Black Sea outflow—a hidden river.

No freshwater shark lives in the Bosphorus; the strait mixes salt and fresh water, but sharks like spiny dogfish are occasional visitors.

The Marmaray Tunnel, opened in 2013, is a railway tunnel carrying commuter trains—no car tunnel exists under the strait.

While Turkey built all three bridges, ancient Persians built a pontoon bridge across the strait in 513 BC under Darius I.