More containers and debris have been pushed from the Rena wreck at Astrolabe Reef overnight as a storm caused the stern section to move.

Maritime New Zealand spokesperson Sophie Hazelhurst says an unknown number of containers have gone into the sea and a navigational warning has been released this morning.

More containers and debris fall from the Rena overnight. Maritime New Zealand is monitoring the movement of the wreckage at Astrolabe Reef. Photo: LOC.

Winds in port were recorded gusting to 55knots and the Port of Tauranga's A Beacon recorded seas of 3.9 to 5.7metres.

Further debris including timber has gone into the sea and an observation flight by MNZ this morning confirms a debris field is moving in a southeast direction from the wreck, covering a two mile square area between Astrolabe Reef and Motiti Island.

MNZ confirms further containers have fallen into the sea. Two have been confirmed in the water.

'We've only got quite bare details at the moment but we will be putting more details and photos out later this morning once we have got a clearer picture,” says Sophie.

Further information, and photographs, will be made available on MNZ's website later this morning.

Meanwhile, 95 boats taking part in the Tauranga Game Fishing Club's One Base competition set out today in 3.4 metre swells to catch fish – and provide hundreds of debris spotters for Maritime NZ.

TGFC manager Grant Holley says fishers will be heading to Motiti, Aldermen and the Mercury Islands, fishing the 80 metre contour to catch mostly marlin.

'Some might be bottom fishing or chasing kingfish, but the majority are after marlin,” says Grant.

The weather forecast on Wednesday forced the cancellation of the first day's fishing with the decision to fish today being made at 7am.

While the maximum swell at A beacon is 3.4m, Grant says the significant swell is 'only” 1.9m and there is zero wind.

Seacoms, which handles the game fishing competition communications, will be transmitting the MNZ container number 0800 333 771 to all the boats fishing in the competition so they can call in any debris that is seen.

'People are encouraged to keep calling that container number,” says Sophie.

'We have really appreciated the information flow we have got from the public throughout this response.”

Braemar Howells are mobilising all their vessels to recover containers and debris, which is reported in a fairly specific area.