A Filipino crewman seriously injured after being struck across the chest by a steel rope as a crane boom collapsed on a ship at the Port of Tauranga last week is out of intensive care.

The 42-year-old was working onboard the logging ship Nordic Visby around 5.30am on Thursday when the main crane boom snapped causing a steel rope to strike the crewman in the chest.

McLeod Cranes removing the 16 tonne boom from the Nordic Visby on Saturday night.

The Nordic Visby with its crane boom snapped on Thursday.

He was taken to Tauranga Hospital in a serious condition with lacerations to his upper chest.

Bay of Plenty District Health Board communications manager Diana Marriott says the man was transferred from the Intensive Care Unit around 7pm yesterday into a ward where he remains stable.

Maritime New Zealand spokesperson Steve Rendle says investigations into the boom's collapse are continuing, but the ship has now been cleared to depart.

The United Kingdom flagged ship was ordered to stay in port after the incident, which happened as the ship arrived from Napier on Thursday. It was scheduled to depart at 1.30am on Sunday for Lanshan in China.

Steve says the four cranes on board cannot be used until the manufacturer has been contacted and a surveyor from the Classification Society has inspected the machinery.

'We required them to look at all the cranes and the Classification Society will make that happen.

'Enquires will be continuing, but that's just for the cranes onboard.”

The Classification Society, a non-governmental organisation, establishes and maintains technical standards for the construction and operations of ships and offshore structures.

Classification surveyors inspect ships ensuring the ship and its components and machinery are built and maintained according to the standards required for their class.

The 16 tonne boom was removed from the logging ship on Saturday in a 10 hour effort from McLeod Cranes and Page and Macrae Engineering.

McLeod Cranes managing director Scott McLeod says it was a 'very tricky” lift as the bend in the boom offset the centre of gravity.

'The change in gravity made it hard for hooking it up and lifting it out as it was quite a dangerous evolution as we didn't want it going turtle on us and turning over.”

Three cranes were used to remove the boom, including McLeod's 170 tonne and 130 tonne cranes, in what was a 'serious engineering effort” from 1pm to 11pm, says Scott.

According to the Port of Tauranga schedule the Nordic Visby remains berthed in Tauranga and will depart tomorrow at 9.30pm.