A relieved Air Force flight lieutenant says he is still "haunted'' by a helicopter crash on Anzac Day 2010 that killed three crewmen and seriously injured a fourth.

A military tribunal has heard from more than a dozen pilots that the actions of a lead pilot on the morning of a fatal air crash were reasonable.

A military tribunal has been told an Air Force helicopter squadron treated standard orders like guidelines that gave good "generic guidance" rather than absolute orders to obey before a fatal crash three years ago.

A co-pilot in a formation involved in the fatal crash of an Iroquois helicopter three years ago has a case to answer, a military tribunal has decided.

A co-pilot in a formation involved in the Anzac Day crash says a "good proportion" of 3 Squadron pilots were outside standard orders when flying into rough weather.

An Air Force squadron was warned before a fatal helicopter crash on Anzac Day three years ago that the practice of flying under low cloud contravened Air Force rules, a tribunal was told today.

A pilot leading a formation of Air Force helicopters during the Anzac Day tragedy was following his training in flying below low hanging cloud, a tribunal has been told.

The pilot in charge of a formation of Iroquois helicopters when one of the choppers crashed on Anzac Day has pleaded not guilty to a charge of negligence.

A student pilot was lucky to walk away from an emergency landing on an East Cape beach.

Boaties have been asked to stay 500m from the site where the plane belonging to 2degrees chief executive Eric Hertz and his wife crashed while divers search for bodies.

Police will decide whether the wreck of the plane belonging to the 2degrees' chief executive Eric Hertz will be recovered from the seabed off the Waikato coast, the Navy says.

It is likely to be Friday at the earliest before exploration can continue at the scene of a fatal plane crash off the Waikato coast.

Plane wreckage, thought to contain the bodies of 2degrees' chief executive Eric Hertz and his wife Kathy, has been found on the sea floor off the Waikato coast.

The underwater search for plane wreckage believed to contain the bodies of 2degrees boss Eric Hertz and his wife has turned high-tech with the use of a high-tech torpedo.

The head of a Navy team using sonar to search for aircraft wreckage says it's possible the bodies of 2degrees' boss Eric Hertz and his wife Kathy may never be found.

The bodies of 2degrees chief executive Eric Hertz and his wife, Kathy, who died when their plane ditched off Kawhia on Saturday, may never be recovered.

Rescuers are struggling to reach the bodies of 2degrees' boss Eric Hertz and his wife Kathy believed to be inside the plane wreckage on the sea floor.

A search is underway for two people aboard a twin-engined aircraft that ditched in the sea off Kawhia at around 12.20pm today after reporting engine failure.

A pilot who ditched his helicopter in a Northland bay has been slammed by crash investigators for a series of failings.

Senior air force commanders are under investigation over the Anzac Day tragedy which left three staff dead and another seriously injured - but there is only a month left to lay charges.

The military inquiry into the firefight in Afghanistan that left two soldiers dead is unlikely to be made public, the New Zealand Defence Force says.

The lead pilot of the air force's fatal Anzac Day formation is being made a scapegoat for failures right up the command chain, says the father of one of the men who died in the 2010 crash.

An RNZAF officer has been charged over the fatal Iroquois crash at Pukerua Bay on Anzac Day 2010.

A coroner says it will be a "massive task" to piece together what happened in a fatal mid-air crash which killed two teenagers and a helicopter pilot in 2008.

A helicopter pilot and three passengers had a lucky escape after crash landing on Lake Rotorua this morning.

A New Zealander is suing for more than half a million dollars after he was seriously injured when his international flight plunged more than 200 metres in two seconds.

The pilot of a microlight that crashed on Wednesday night, killing two men, has has been described as a fun-loving family man.

A father who found the wreckage of a microlight in which his son and another man were killed says he knew the risks and "you can't cover your kids up in cotton wool".

The bodies of the three Canadian men believed killed in a plane crash in Antarctica will not be recovered until at least October, Antarctica New Zealand says.