An Air Force Orion has been sent to rescue four Kiwis on board a yacht that's run aground on a reef south of Fiji.
The 20-metre yacht, named Jungle, left Picton a week ago for Tonga.
Last night, the crew experienced an equipment failure and changed course for Fiji.
Rescue Coordination Centre spokesman Vince Cholewa says they activated a distress beacon at 4am today to say they'd gone aground on a reef 370km south of Fiji.
He says the Orion is due to arrive at midday.