Specialists are being winched onto a car transporter ship diverted to Hampshire after it caught fire last night, 40 miles off Harwich in Essex.
The crew on board the Courage reported the fire to the UK Coastguard at Dover Maritime Rescue Coordination Centre just before 10pm on Tuesday.
The coastguard had put the RAF Wattisham helicopter on standby, but it was not needed.
The crew used an inbuilt CO2 system to flood a large area which they believed had put the fire out and continued their journey. However because of the CO2 the corridors and areas around the deck cannot be accessed.
The vessel was diverted to Southampton. It is now off Sandown on the isle of Wight where it is being monitored by the the National Maritime Operations Centre. Hampshire Fire & Rescue Service and the Maritime and Coastguard Agency are working together to make the situation safe.
A number of specialists from Hampshire Fire and Rescue assessment team will look at where the CO2 was used to make sure it’s safe for the pilot to get through to take the vessel alongside in Southampton.
Counter-pollution staff from the Maritime and Coastguard Agency are monitoring the situation but say it is all contained.
Hampshire Fire & Rescue Service have said that the fire is now contained and under control. Five maritime response officers from the service have been winched aboard the vessel to assess the situation.
A search for a diver who failed to resurface after an expedition off the Dorset coast was suspended overnight.
Lifeboats from Poole and Swanage and two search and rescue helicopters were launched in the rescue mission on Sunday evening. A decision will be made this morning in conjunction with Dorset Police and other organisations on the next steps for today.
It's being reported that a teenager, critically injured after the prototype powerboat he was in crashed in the Solent, is out of immediate danger in hospital.
Simon Dredge suffered life-threatening injuries in the crash on Wednesday.
He was travelling in the boat along with three other professional crew including his father Peter, a champion powerboat racer.
Powerboat company, Vector World said the boat was on its first test run when it overturned.
A spokeswoman said: "We are encouraged to hear that Simon is stable and improving."
Peter Dredge, Simon Wood-Power, a powerboat racer and Lee Hurst, a powerboat engineer were all taken to Southampton General Hospital with non life-threatening injuries.
They have since been discharged.
A teenage boy is fighting for his life in hospital after a terrifying speedboat crash off the south coast.
Three other people on the powerboat were seriously injured when the vessel hit a navigation buoy and flipped over.
It happened at around 8.20am just outside the Hamble River, close to the Warsash Maritime Academy. The coastguard helicopter from Lee-on-Solent and two RNLI lifeboat crews from Calshot raced to the scene. The Coastguard said it had received multiple 999 calls from onlookers on the beach who saw the accident or its aftermath.
Divya Kohli has our report.
A speedboat which overturned in Southampton Water near the River Hamble this morning has been towed inshore for further investigations to continue. Four people injured in the accident are in hospital - one with life-threatening injuries.
An eyewitness has been describing the dramatic moment that a speedboat hit a buoy, flipped over and hit the waterinjuring four people in Southampton Water just off the mouth of the River Hamble in Hampshire.
The incident happened at about 8.20am. The four people on board the boat were all injured.The South Central Ambulance service said that one male teenager - in a life-threatening condition, and three other people were taken to Southampton General Hospital by road.
The interviewees are eyewitness Gary Pullen; and Acting Inspector Wendy Douglas from Hampshire Police.
Four people injured after a lifeboat capsized just outside the Hamble River have been taken to Southampton General Hospital.
The UK Coastguard said it had received several 999 calls from the public reporting that a speedboat had crashed into a cardinal marker - a buoy - and turned over just outside the Hamble River and near the Warsash Maritime Academy.
The Search and Rescue helicopter based at Lee-on-Solent and both RNLI lifeboats from Calshot were called to the scene. The emrgency crews reported that all four people on board the boat suffered injuries.
Four people rescued from a speedboat which capsized just outside the Hamble River in Hampshire have been taken to Southampton General Hospital. It happened just after 8am.