[Ads-l] "to ping"

[W Brewer]

FWIW, Wikipedia's "Submarine films":
<<Submarine films have their own particular semantics and syntax, creating
a film genre concerned specifically with submarine warfare. A distinctive
element in this genre is the soundtrack, which attempts to bring home the
emotional and dramatic nature of conflict under the sea. For example, in
the 1981 Das Boot, the sound design works together with the hours-long film
format to depict lengthy pursuit with depth charges, and as the critic
Linda Maria Koldau writes,
"again and again, the mortal threat of the [sonar] ping, which signifies
[the crew's] helpless exposure to the enemy."  >>

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