A tramper has been rescued after his emergency beacon signal was picked up by a US company.
A 36-year-old Palmerston North man injured his knee while tramping near the Otaki River in the Tararua Ranges on Sunday.
He set off his SPOT messenger beacon, which was monitored by a private US company as it transmits a signal to a different satellite than beacons normally used in New Zealand.
The Rescue Coordination Centre notified Wellington's rescue helicopter that the signal had been picked up.
Life Flight crewman Dave Greenberg says they used night vision goggles to spot a torch beam under trees near the riverbed.
He says a paramedic was winched down some 46 metres to rescue the man.