Vertical drilling, meanwhile, has reached a depth of 42 metres out of the 86 metres needed, as on Tuesday morning. Earlier, the drilling was being carried out by a huge auger machine whoch got stuck in the rubble
Former advisor to PMO Bhaskar Khulbe said in the next 14-15 hours, the rescue team will be able to cross the 60-metre mark and it will take 12-14 hours more to reach the spot where the workers are trapped.
To make receiving the images easier, the Uttarakhand tunnel's officials employed an endoscopic flexible camera, whose wire took the shape of the pipeline to which it was attached.