Salvage of sunken boat in Mercury Bay planned

The 50-foot motor launch struck rocks near Motukorure Island and sank in about 20 metres of water with 1300 litres of diesel on board. Photo: Supplied.

The recovery of a boat in Mercury Bay is unlikely to start until at least Tuesday, says a Waikato Regional Council spokesperson.
 
"Time is needed for equipment large enough to recover the boat, to arrive in Whitianga."

The 50-foot motor launch struck rocks near Motukorure Island – also known as Centre Island – sometime before 3.45pm on Wednesday and sank fairly quickly, with 1300 litres of diesel on board. The skipper and his passenger were uninjured.

Waikato Regional Council maritime officers arrived just before the vessel sank completely in approximately 20 metres of water and remained on scene to assess whether there was any oil or diesel leak.

It is understood there is around 1300 litres of diesel onboard.

“The good news is that there’s no evidence of oil spill and no smell of diesel in the vicinity of the sunken vessel,” says Regional On Scene Commander Cliff Gibson. 

“Based on the information we have, we believe the vessel’s fuel tanks will be intact at this stage, but the breathers will be open.”

A breather is a vent from the tank to relieve pressure. It stops fuel coming back out of the filler tube when the tanks are being filled.

This is the moment a 50-foot launch disappeared in 20 metres of water off Motukorure Island in Mercury Bay. Photo: Waikato Regional Council.

Specialist equipment for recovery of the sunken vessel means recovery is not expected until the middle of next week.

“The salvage company’s divers have undertaken an assessment of the boat and found it to be in generally good shape,” says Cliff.
 
“They’ve also confirmed that it’s stable, sitting on a reef and in a position where it’s unlikely to move.
 
“While underwater, the divers have plugged the boat’s breathers – that’s the vents from the tank to relieve pressure and stop fuel coming back out of the filler tube.
 
“We have been able to determine that this vessel is about 10 years old, but new to the owner, and is sitting upright in more than 20 metres of water."
 
Cliff says based on this latest information, and forecast offshore wind conditions remaining favourable for at least the next week, they remain confident there is minimal risk to the environment at this time.
 
"However, regional council has contingency plans in place should circumstances change."
 
The salvors have told the council the boat’s recovery is likely to start on either Tuesday or Wednesday next week.
 
“Due to the size of the vessel, larger equipment is needed for the salvors to recover the boat, and this will take several days to arrive.”

"Given the seriousness and scale of the situation, a formal investigation is likely to follow."

Divers are expected to return to the site over the weekend to undertake another assessment of the vessel.
 
Regional council maritime officers will also continue to visit the site over the weekend to assess the scene for any signs that oil or diesel may be leaking.

"Our Maritime Officers Hayden and Pete are monitoring the situation twice daily and efforts are underway to arrange salvage which is the responsibility of the vessel owner.

“The good news is that offshore wind conditions are forecast to remain favourable for at least the next week, meaning the vessel is likely to remain in situ and therefore at low risk of breaking up and impacting the environment."

A regional council-led response team has been working with local iwi and the Department of Conservation to identify culturally significant sites and undertake wildlife assessments.
 
“We have contingency plans in place should circumstances change from the current prevailing conditions and situation, but remain confident there is minimal risk to the environment at this time," says Cliff.

Meanwhile, any boaties on the water over the weekend who see what they believe to be an oily sheen in the vicinity of Motukorure Island, are urged to call 0800 800 401.

 

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