Before that, in December 2011, it won a $691 million U.S. Navy subcontract for “combat and sonar systems” for submarines.
He was talking about the sonar beacon linked to the black box of Air France Flight 447.
It was given to drink jardar magn svalkaldr sr and sonar dreyri.
The sonar equipment showed what kind of rock it was—iron and basalt.
It would consist of attaching hundreds of mikes and speakers all over the hull to pick up and transmit the sonar pulses.
But what good would it do anyone to stick a sonar device on an island like this?
He listened for code on the sonar equipment, but heard only the weird and nameless sea-sounds.
For instance, there must have been a sonar unit near where we swam at St. Thomas.
He adjusted the sonar pickups, turned the amplifier to maximum, and listened intently.
Thus the sonar waves would appear to be striking no obstacle—and no echo would return to the sonarscopes on the search craft!