Ship's captains and outside monitoring firms have reported waves of GPS jamming around Shanghai's ports, on a scale and of a severity never seen before: the jamming causes ships' locations to be incorrectly displayed and to jump around; the observations were confirmed via an anonymized (sic) data-set from a short-hire bike firm, whose bikes are also mysteriously appearing and disappearing at locations all through the region. The spoofing has created a massive local shipping hazard and has led to spectacular shipwrecks. Read the rest