Before setting off from Aberdeen, the report stated that the helicopter was serviceable, except for a "deferred defect", affecting part of its ice detection system.
Patients should not use the NovoTTF-100A System if they have an implanted medical device or a skull defect, or have a known sensitivity to conductive hydrogels, such as those used with electrocardiograms.
It is also a national defect, one that may soon be the undoing of a system based on the willingness of a few to protect the rest of us at great risk to themselves.