The pinging detector towed by the Ocean Shield is really the last best hope of pulling this off.
Sean Hoare, a former News of the World business reporter, says “pinging” cost $500 a pop.
to get someone's attention with a sharp sound or other form of communication
1835, imitative of the sound of a bullet striking something sharply. Meaning "short, high-pitched electronic pulse" is attested from 1943. As a verb from 1855; in computer sense is from at least 1981. Related: Pinged; pinging.
To get someone's attention with a sharp sound or other form of communication: ping my accountant with April 15 getting close