Passages
World · Register
Recorded 2026-08-23
#PassageStateWhat constrains itAlternativeAdded days
01PanamaBindingFresh water — Gatun Lake levels set draft and slot countLand bridgeNot sourced02GibraltarOpenThe Strait of Gibraltar is constrained by geography rather than draft: the passage narrows between…None recordedNot sourced03BosphorusWatchThe Bosphorus is constrained by geography before it is constrained by politics: its narrow channel,…None recordedNot sourced04SuezWatchSuez is a sea-level canal, so freshwater scarcity and lock capacity do not ration passage as they…None recordedNot sourced05Bab el-MandebBindingRouting diversion around a war-risk insurance zoneNone recordedNot sourced06HormuzWatchHormuz is constrained by political control laid over narrow geography, not by draft or a seasonal…No sea alternativeNot sourced07MalaccaOpenThe Strait of Malacca is constrained by navigational geometry rather than a toll or a single…None recordedNot sourced08Taiwan StraitWatchThe Taiwan Strait is not constrained chiefly by draft or a narrow navigable channel.None recordedNot sourced09Cape of Good HopeOpenCape of Good Hope is an open deep-water route around southern Africa, not a canal or a narrow…None recordedNot sourced10Danish straitsOpenThe Danish Straits are three separate routes between the Baltic and the North Sea: the Great Belt,…None recordedNot sourcedState describes the constraint, not the risk of an event. Added days is withheld everywhere on this register — no wired source backs a single per-passage day figure, so the column renders honestly rather than estimating one.