In a wide-ranging korero, Peter Ratahi Cross discussed the “blue economy” – we thought it would be good to add an explainer about what it is and what it might do:
As extreme weather increasingly cuts roads, isolates communities, and disrupts supply chains, attention is turning to what many are calling the “blue highway” – Aotearoa’s vast network of coastal and inter-island sea routes.
Surrounded by moana and stretched across more than 15,000 kilometres of coastline, New Zealand is, at its core, a maritime nation. Long before roads and rail, waka travelled these waters, moving people, kai, tools, and knowledge between rohe. Today, that same ocean network remains one of the country’s most underused but strategically vital transport systems.
The “blue highway” refers to the use of coastal shipping and sea freight to move cargo, fuel, food, building materials, and essential supplies around and across Aotearoa – from major ports to regional wharves and isolated communities. Unlike roads and rail, sea routes are not vulnerable to slips, washouts, or bridge failures. When land connections fail, the ocean often remains open.
In recent years, storms, flooding, and climate-driven disasters have repeatedly exposed the fragility of New Zealand’s land-based transport system. Entire regions have been cut off for weeks at a time, with fuel, food, and medical supplies delayed or flown in at high cost. In these moments, the importance of seaways becomes clear – not as a backup, but as a core piece of national resilience.
Shipping is also one of the most energy-efficient ways to move goods. Per tonne of cargo, coastal vessels produce significantly fewer emissions than trucks, making the blue highway a critical tool in reducing transport emissions while maintaining supply security. For a country committed to climate goals, shifting more freight to sea is both practical and necessary.
For Māori, the blue highway carries deeper meaning. The moana is a taonga, a connector rather than a barrier. Strengthening coastal shipping aligns with tikanga Māori concepts of interconnection, guardianship, and long-term thinking. It also creates opportunities for iwi-led port development, regional employment, and local control over supply routes – particularly for isolated coastal and island communities.
Despite its potential, coastal shipping in Aotearoa has long been under-invested. Policy decisions over decades have favoured road freight, leaving wharves, small ports, and regional shipping services under-resourced or closed altogether. As climate impacts intensify, that imbalance is becoming harder to justify.
Reinvesting in the blue highway means upgrading regional ports, supporting coastal shipping operators, and integrating sea freight into national transport planning – not as an afterthought, but as essential infrastructure. It also means recognising that resilience is not just about speed, but about redundancy: having multiple ways to keep communities supplied when one system fails.
As Aotearoa faces a future of more frequent storms and greater uncertainty, the message is increasingly clear. The ocean that surrounds us is not just a boundary – it is a pathway. Strengthening the blue highway is about remembering who we are as a maritime nation, and ensuring that when the roads fall away, the lifelines remain open.
