Rosberg: Halo did not disturb me

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Nico Rosberg said the halo safety device fitted to his Mercedes on Friday did not disturb him around the famous Spa-Francorchamps circuit.

The Formula One calendar makes its way to Spa this weekend for the Belgian Grand Prix after a four-week break. 

Rosberg was one of four drivers who tested out the safety device in free practice, but was the only one to do more than an installation lap - setting the benchmark time in the process. 

While visibility has been a concern of the drivers, Rosberg said the halo caused him no troubles around the notoriously tricky circuit. 

"It was good to try it and they've done a great job with it because it doesn't disturb me at all when I'm driving, it just increases the safety a lot," the German said. 

"I know it's not nice visually, looking from outside it doesn't make the cars prettier of course.

"But it's such a big step in safety and I think it's a good thing.

"You don't even notice the top part. They could even come down with that."

While the implementation of the device is expected to be put on hold until 2018, teams continue to run prototypes to get a better picture of the necessary requirements associated. 

"Probably the biggest concern and margin for improvement is that getting in and out of the car is quite tricky at the moment," said Toro Rosso's Carlos Sainz, who was one of the three other drivers to test the device.

"I defend the halo a lot and I am a big supporter of it because it can save lives, but if there is something to be improved we need to say it.

"At the moment extraction is not easy."