Most cross land or sea borders illegally, he says, but 150, 000 overstay their visas.
As long as the person does not overstay, in practice there is little enforcement against these persons.
The Times of India reported that at some point during the overstay the plane's autopilot function was inadvertently disengaged.
But they are far more noticeable than those who quietly overstay their visas.
The new system will, however, be ideally suited for spotting tourists or students who overstay on their visas, but that is a trivial issue.
The nation also needs to continue harnessing technology to identify risky foreign visitors and swiftly deport those who commit crimes or overstay their visas.
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But there is a risk that they overstay their useful lives.
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But even islands will never catch all those with no right to be there: most illegals are visitors who overstay their tourist or student visas.
Labour peer Lord Davies of Stamford asked whether such a move would be "an incentive" for people to come to the UK or to overstay their visas.
Some (including mine) will give you so much extra time for the asking, some will let you stay into mid-afternoon for an extra twenty to fifty bucks, others will bill you for another night if you overstay check-out by five minutes.
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Ms Cooper said the number of such visas has gone up by 30, 000 a year since the election even though applicants do not have to meet any academic requirements to be eligible and no checks are made on whether they study or overstay.
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