A Mount Maunganui man has been flown to Devonport naval base hospital with a suspected case of the bends after diving near the wreck of the Rena.
The 68-year-old was flown to the naval base by the TrustPower TECT rescue helicopter for specialist treatment.
Rescue helicopter pilot Liam Brettkelly said the man had been diving off the Tauranga coast on Sunday afternoon but began to feel unwell after surfacing.
"He said to the nurse it was like the worst hangover he's ever had, but without the drink," Mr Brettkelly said.
The man went to hospital about 11pm on Sunday.