1) PFEER Standard Tones2) NORSOK Standard Tones3) IMO Standard Tones4) DNV Standard Tones

The mandatory tones that make up these alarm sets are as follows:1) PFEER

PAPA (Prepare to Abandon Platform Alarm) Alarm ToneWarble tone; frequency 1200Hz ramping down to 500Hz within 1 second.

GA (General Alarm) Alarm ToneIntermittent tone 1 second on, 1 second off at 1 KHz.

Toxic Gas Alarm Tone

2) NORSOK

Muster/Prepare to Abandon Platform Alarm ToneWarble tone: frequency 1200Hz ramping down to 500Hz within 1 second.

GA (General Alarm) Alarm ToneIntermittent tone 1 second on, 1 second off at 1 kHz.

Toxic Gas Alarm ToneIntermittent tone 1kHz, 0.1 second on, 0.1 second off, in bursts of duration 1 second alternating with 1 second silence.

3) IMOMuster Alarm Tone

Fire Alarm Tone

7x short blasts of 1kHz followed by 1 x continuous 1kHz for 7 seconds then the cycle repeats.

Toxic Gas Alarm ToneInterrupted 1KHZ tone

4) DNVGA (General Alarm) Alarm Tone7x short blasts of 1kHz followed by 1 x continuous 1kHz for 7 seconds then the cycle repeats.

Muster and Toxic gas alarm tones are equipped as above

Muster Alarm Tone

Toxic Gas Alarm Tone

Interrupted 1KHZ tone