A chokepoint is a stretch of water narrow enough that closing it forces a detour long enough to change the economics of a trade. That definition excludes a lot of famous straits and includes a few obscure ones. Ranked below by throughput, with the reroute cost that gives each one its leverage. Volumes are approximate and stated on a normal-year basis. Several of these have not had a normal year since 2023, which is noted where it applies.