A New Zealand logistics company estimates war surcharges could add up to ten million US dollars to its monthly freight costs. The Hormuz strait a vital shipping lane between Iran and Oman is current closed. Iran's threatening to bomb any ships trying to pass through the narrow strip of water. Kotahi co-ordinates the ships various New Zealand exports including dairy and meat to the region. It has thousands of containers literally at sea and it say freight companies are charging a per container premium for delivery. Kotahi chief executive Emma Parsons spoke to Lisa Owen.