Chokepoints.

The direct canal connection between the Mediterranean and Red Sea.

Southern entrance to the Red Sea and the Suez route.

The principal deep-sea alternative to Red Sea and Suez routing.

The narrow maritime outlet connecting Gulf ports to the Arabian Sea.

A central link between the Indian Ocean, Singapore and the South China Sea.

A lock canal linking Atlantic and Pacific services across the Americas.

A heavily connected corridor between North and Southeast Asian networks.