In one of his book there is a description of the Kergelen island where a foreign country built a hidden submarine base and he say that this island is empty (just a meteo station with 3 guys)
. This man never search on google or yahoo about this french island because there is one of the biggest french polar research station with almost 200 people in summer and 50 in winter (half are from army forces).
And for his new novel, it is well known thaht in the french navy, we left all saturday night the submarine keys on the pump jet with the nuclear lauch code when the crew is at a party.