Coastguard Hawke's Bay was called to rescue a 50ft launch that had run out of diesel almost 48km off Napier Port on Sunday.
The launch with three people on board had been travelling to Picton.
President Henry van Tuel said because the distance offshore was outside the Coastguard's rescue survey limits, dispensation was required from Maritime New Zealand.
"Celia Knowles Rescue then loaded additional fuel and departed Napier about noon and arrived at the launch just after 1pm," he said.
Several hundred litres of fuel were transferred and it was decided to tow the launch while the fuel lines were bled. This took time and the launch was finally able to start its engines at about 5pm with the vessels about 9km off the port.