The second officer of the Rena, who was in charge of the navigational watch, will appear in court tomorrow on a charge of "operating a vessel in a manner causing unnecessary danger or risk''.
He will appear in the Tauranga District Court at 10am.
This morning, the Master of the vessel appeared in the Tauranga District Court facing the same charge. He was remanded on bail until 19 October on the condition he surrender his passport. His identity is suppressed.
The s65 charge carries a maximum penalty of $10,000 or a maximum term of imprisonment of 12 months.
Maritime New Zealand says it will make no further comment while the matter is before the courts.
Salvage workers will be dropped onto a precariously tilting and cracking Rena at first light tomorrow - if the ship doesn't topple onto its' side or crack in half overnight.
Svitzer, a specialist company, has been hired to carry out the salvage efforts for the cracking cargo vessel leaking oil off the coast of Tauranga.
Spokesman Matthew Watson said the salvage plan priorities were to get the remaining oil off the boat and pick up stray floating containers.
"The focus tomorrow at first light will be endeavouring to get salvors back on to the vessel. They would have to be winched down by helicopter, that is the only safe way to access the vessel.
"When they get on board, they would have to do another assessment of the vessel, ascertain its' structural integrity and see what additional damage and the extent of the additional damage since they evacuated yesterday.
"Then if it's deemed safe enough for them to be there, they would immediately look at trying to get the oil back off the vessel. They would resume the oil transfer process.''
He said the oil transfer process started on Sunday, but had to abandoned the efforts because of bad weather.
"In tandem, the other priority is intercepting and corralling the numerous containers and debris that have come off the vessel.
"A series of smaller vessels are in the process of being mobilised, including a large crane vessel from Wellington which should be in place by tomorrow morning.''
He said the collection of containers and various debris was dangerous because the items might not be visible to the naked eye.
The crane vessel would focus on rounding up lost containers and would not attempt to get the remaining containers off the ship, he said.
"There is a very high chance that some more containers might fall into the water. Even to get a crane vessel near the stricken vessel at the moment is a dangerous exercise. It's too rough, so for the moment, the focus is getting the containers already in the water and the oil off the boat.''
The weather conditions would be assessed first thing in the morning to decide whether a salvage team can board the ship, if it was still in one piece, he said.
"The biggest fear is that the ship is going to keep going and topple over to one side. That can't be ruled out.''
The stricken vessel was now tilting on an 18 to 20 degree angle and was starting to crack.
"The ship has grounded in a very awkwards and precarious way....There is a very serious crack on the starboard side of the hull and a serious crease on the port side of the hull.''
He said the salvage plan was fluid and flexible at the moment, and had been changing frequently to move with the situation over the last few days.
A Maritime NZ spokesman said the Rena is now being held together only by its internal components and there was a possibility it could break in half.
Defence spokesman Paul Stein said four Navy vessels were in the area, helping the Maritime New Zealand effort.
Mr Stein said HMNZS Rotoiti, Taupo, Endeavour and Manawanui were patrolling the exclusion zone and ferrying people.
Navy vessels also helped in the evacuation of the Rena.
"They have the skills and discipline in the conditions that they find at the moment. I suggest it is an uncomfortable place to be.''
