Whistle

[CharlesHarris]

(6 July 2018, 16:33)Mortblanc Wrote: Man CH you have to be on e of the most organized people left on planet Earth.

What do you mean "code"?

I'm just going to honk down on that thing till someone shows up!

NYPD used the Morse code signal for a numeral, using the whistle blasts, as a substitute for the radio Ten-Codes, ignoring the "ten" but sending the second numeral only, back in the days before portable police radios, so that a Radio Motor Patrol unit (RMP) could relay the whistle signals from an isolated officer in pursuit back to the main dispatch.

Old system was used as backup after 9/11 when the Towers collapsed and the police radio system was down until the backup system became operational.

[Pete Grey]

(5 July 2018, 18:45)CharlesHarris Wrote: Police and Fire Dept whistle code in the US originated from that of the London Metropolitan Police and fire brigades dates from the 1880s:

One LONG blast - Traffic/hoist stop as directed by officer's hand or light signal

Two short blasts - Traffic/hoist may proceed (GO) as directed by traffic signal

Three LONG Blasts - EMERGENCY STOP! HOLD FAST!

Three LONG blasts of the whistle is recognised as an international distress call.

Two blasts of the whistle is the international recognition or call-back signal which means "Come here."

One blast is also recognized an inquiry signal which means "Where are you?"
or "SOUND AGAIN" as a call-back signal if you hear anything undetermined, which might be a code.

Short blast is ONE second.

LONG blast is THREE seconds.

Useful info Charles.

These codes could be used by a small or family group while evacuating or on patrol, or on a scavenging trip if no radios were available.