[B212]

3.2.1
A
n Underwater Location Beacon (ULB) fitted to an aircraft flight recorder
is triggered by immersion in water. It will emit an ultrasonic pulse of 10
milliseconds, at 37.5 kHz and at one-second intervals. The present ICAO
requirement is for ULBs (“pingers”) to transmit for at least 30 days. They have a
nominal audible range of 2 to 5 km, depending on parameters such as depth,
water temperature and sea conditions.
3
http://www.azi.hr/docs/ACC_GuidelinesWeb%5B1%5D.pdf

[Paladin2]

Enough with the regular pings....

[the OlLine Rebel]

Ah, I get the joke.

You are “pinging” us repeatedly!