Attacks and naval stand‑offs from the Red Sea to the Strait of Hormuz have redrawn shipping maps. Since late 2023 following Houthi attacks from Yemen on passing vessels, many liners have skipped Suez for the Cape of Good Hope, resulting in longer voyages and higher costs. Meantime, Gulf tensions fuel added uncertainty. UN Trade and Development now warns growth will stall as volatility sticks and cargo transports take longer routes.
For Australia this is not just a shipping problem but a food‑systems problem: grain and oilseeds sailing west face the same chokepoints as the fertiliser we import from the Gulf. In strategic terms, food and farm inputs are economic security. Reliability under pressure earns leverage with allies and buyers.
Operator reporting shows the pattern from the waterline. Shipping giant Maersk continues to flag detours around the Red Sea and Bab el‑Mandeb, and the Review of Maritime Transport 2024 put numbers on the shift: Suez transits fell while Cape arrivals surged. Detours are not a blip. Schedules remain elastic, war‑risk premiums are higher, and carriers sometimes cut calls to protect rotations. I would not plan on a neat return to the old map soon.
What does that mean for Australia’s exports? Start with grain and canola bound for Europe and North Africa. Canola relies on the European Union. When sailing days lengthen and insurance rises, the reliability premium looms larger. Buyers care about on‑time delivery as much as price. Tighter shipping supply shows up in higher freight, jumpier schedules and more demurrage risk. This cascades into basis, storage decisions and shelf‑life pressure down the chain. GrainCentral’s trade breakdown shows where the exposure sits.
Flip the map and you hit fertiliser. Australia brings in most of its urea and other nitrogen products from abroad, with a large share sourced from Gulf producers. WITS trade data shows the reliance, and Rabobank underlines how quickly global urea markets react to shocks. A Hormuz scare is therefore a direct farm‑input risk. Marine insurers lift war‑risk premiums for Gulf transits. Even if oil tankers grab headlines, bulk cargo transport feels the price signal too. When fertiliser costs jump, it lands on every paddock and shapes planting decisions more than speeches do.
Could Iran close the Strait of Hormuz? A full, sustained shutdown is unlikely, but meaningful disruption is plausible. CSIS is clear about the toolkit: mines, fast‑attack craft, drones and anti‑ship missiles can harass shipping and raise risk for weeks at a time. EIA shows why it matters: more than a quarter of seaborne oil and about a fifth of global LNG transits Hormuz, largely from Qatar. Even without a formal closure, that level of threat is enough to spike premiums, stretch voyages and slow loadings.