One of Monday's helicopter crashes occurred after the helicopter was returning from a raid on a compound, ISAF said.
Coastguard teams from Porthcawl and Port Talbot, a rescue helicopter from Chivenor, Devon and a police helicopter were also taking part.
Despite an extensive search involving a Royal Air Force rescue helicopter, five RNLI lifeboats, other vessels and a police helicopter, Mr Robertson was not found.
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Pakistani journalists started arriving at bin Laden's Abbottabad compound soon after the helicopter crashed and started filing stories about the mysterious helicopter and its oddly shaped tail rotor.
Interestingly, the TW-68 is being developed by a team of designers formerly employed by Bell Helicopter, the company that (together with Boeing Helicopter) has been readying the V-22.
We've even attached a tiny video camera to the helicopter to see when the whale is actually blowing and where we could pass the helicopter through it to collect the sample.
He added that when the helicopter arrived back at Camp Bastion, the troops had to endure a "heavy landing" before they could alight, though he said they had no idea the helicopter was badly damaged.
The Royal Navy's largest ship, the helicopter carrier HMS Ocean, is moored in the Thames off Greenwich, where it will be a base for helicopter operations and house troops providing security at the Greenwich Park Olympic venue.
This bill also terminates troubled and massively over budget programs such as the Future Combat Systems, the Airborne Lasers, the Combat Search and Rescue helicopter, and a new presidential helicopter that costs nearly as much as Air Force One.
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But the helicopter carrying the foreign photographer flew so low over the bathing area that police boats in the water began shaking due to the turbulence caused by the helicopter's rotors, Allahabad's most senior official Devesh Chaturvedi told the BBC.
The Royal Navy's largest ship, the helicopter carrier HMS Ocean, is now moored in the Thames off Greenwich, where it will act as a base for helicopter operations and house 400 troops providing security at the Greenwich Park Olympic venue.
Michelle is the kind of helicopter parent that you might be if your helicopter was Marine One: she demands that Sasha and Malia finish their homework a day in advance when possible, and asks for written reports on their travels.
First of all, the helicopter is actually anchored to the ground during installation, so the spool must be engineered properly to avoid any significant tension in the line or the helicopter will be in jeopardy, especially in unstable weather conditions.
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The project is just in its feasibility stage at the moment, but the charity said a permanent new home for the helicopter would help safeguard the operations of the air ambulance, and provide a sustainable home for the helicopter in the future.
The economists' slang for this kind of policy is the creation of "helicopter" money, because it is seen as the equivalent of dropping money on all of us from out of a helicopter ( see this column by Simon Jenkins for more on this).
Particularly lucky guests might even get to hop inside a 1950s aeroplane or helicopter for a photo op.
Tokyo also says a Chinese frigate locked its radar on a Japanese helicopter in mid-January.
The helicopter carrier left its home port of Portsmouth at as part of Exercise Cougar.
The injured two were evacuated by helicopter to the medical facility at Camp Bastion.
The proposed purpose-built development would house the helicopter, as well as operational and fundraising teams.
Two men were injured when a police helicopter was forced to make an emergency landing.
The affiliate's helicopter pilot estimated the funnel cloud to be about a half-mile wide.
When he was selected for astronaut training he was working with the Anglo-Italian helicopter company AgustaWestland.
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The aerospace giant beefed up the working capital at Airbus and its helicopter unit Eurocopter.
He was taken by helicopter to Derriford Hospital in Plymouth where he was pronounced dead.
Be sure your pilot has training in that specific model helicopter before you board.
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The National Trust scrambled a helicopter with a water bucket to help douse the flames.
Coastguards then helped some of the injured as a helicopter landed on the beach, he added.
The self-propelled artillery system was called Crusader, and the armed scout helicopter was called Comanche.
On his second deployment, he was a co-pilot and gunner on an Apache helicopter.
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