THE BLUE hull of the container ship Contship Borealis looms above me as a steel wall, giving me a sudden jolt of vertigo. Against the darkening sky I can make out tiers of containers on her upper deck. From my viewpoint—idling alongside this 46,000-tonne behemoth in a Ports of Auckland pilot launch—they look like so many stacked building blocks.

In fact, the whole ship is Lego writ large, a floating confirmation of the principle that form should follow function. There is little of beauty in the vessel’s visible lines. All the elegance, I am told, lies hidden beneath the water, where equations of flow dynamics have formed pleasing sculpted curves. Above the Plimsoll line, utility rules. And here, as elsewhere in the world of commerce, utility expresses itself in efficiencies of scale.

Everything about Borealis is big. She is the length of three football fields, and in her holds and on deck she can carry the equivalent of 4100 20-foot (6-metre) containers stacked 14 tiers high. Yet, if asked to, she can crank along at 25 knots—that’s a sharpish 46 km/h. Someone with time to spare has worked out that all those steel boxes laid end to end would stretch for 25 km. Stacked one on top of another—in this Everest year a more fitting calculation—they would rise to three times the height of Mt Cook.

Borealis and nine other “4100s” being introduced to the New Zealand run by CP Ships and by P&O Nedlloyd are also the world’s biggest refrigerated container ships. Each one can plug in 1300 refrigerated containers—“reefers” to those who work them. P&O Nedlloyd’s fleet alone has a chill capacity greater than all the domestic refrigerators in New Zealand combined.

And there is the nub of the thing. In the 1880s, the country’s trade was revolutionised by shipboard refrigeration, which allowed frozen carcasses of mutton to be sold half a world away. Today, cargoes as varied as beef, fish, vegetables, ice cream and tulip bulbs are exported chilled or frozen. The new reefers, each with its own built-in refrigeration plant that can be kept running while ashore or in transit, are a generation removed from the old system of stacking goods in insulated containers, with portholes and sliding flaps, chilled by a ship’s external refrigeration system.

THE SPEED AND carrying capacity of the new fleet, along with its ability, for the first time, to offer scheduled weekly sailings to the east coast of the United States and to Europe, are good news for New Zealand companies fighting to gain an advantage amid the cut and thrust of global trade.

New Zealand sits at one end of the world’s longest trade route—21,000 km from Europe—and despite the romance that still clings to ocean voyaging as stubbornly as seaweed round a keel, sea-borne trade is predicated on hard-nosed bargaining. Which is why Ports of Auckland managers danced a jig or two when, late in 2002, it was announced that Auckland, along with Napier and Port Chalmers, had won the tender to become a fixed port of call on the so-called eastabout service for the big 4100s. It also became the only port of call for the smaller 2200 TEU (“twenty-foot equivalent unit”) container ships circling the globe westward.

A lot went into preparing the ground for that bid: new high-speed cranes, more powerful tugs, a snappy information system, even the creation of what are termed “inland ports” near Auckland’s factories in order to process and shift goods more efficiently.

It is with a sense of occasion, then, in the lee of that great blue wall, that I clip my safety line onto the rail of the pilot launch and make for the bows. Pilot John Barker is already climbing towards a huddle of crewmen at the access hatch, which for such an enormous ship is disappointingly close to the water. Earlier, I watched another pilot negotiate the snaking ladder of a freighter for what seemed an age before making shipfall somewhere near the deck.