§80.221. Special requirements for automatically generating the radiotelephone alarm signal.
47 C.F.R. § 80.221
Each device for automatically generating the radiotelephone alarm signal must be capable of being disabled to permit the immediate transmission of a distress call and message.
The device must comply with the following requirements:
The frequency tolerance of each tone must be ±1.5 percent;
The duration tolerance of each tone must be ±50 milliseconds;
The interval between successive tones must not exceed 50 milliseconds; and
The amplitude ratio of the tones must be flat within 1.6 dB.
Devices installed on or after January 1, 1983, must comply with the following requirements:
The frequency tolerance of each tone must be ±1.5 percent;
The duration tolerance of each tone must be ±10 milliseconds;
The interval between successive tones must not exceed 4 milliseconds;
The amplitude ratio of the tones must be flat within 1.6 dB;
The output of the device must be sufficient to modulate the associated transmitter for H2B emission to at least 70 percent, and for J2B emission to within 3 dB of the rated peak envelope power;
Light from the device must not interfere with the safe navigation of the ship;
After activation the device must automatically generate the radiotelephone alarm signal for not less than 30 seconds and not more than 60 seconds unless manually interrupted;
After generating the radiotelephone alarm signal or after manual interruption the device must be immediately ready to repeat the signal;
The transmitter must be automatically switched from the stand-by condition to the transmit condition at the start and return to the stand-by condition at the conclusion of the radiotelephone alarm signal.
Any device used by a station to automatically generate the radiotelephone alarm signal must be certificated by the Commission.
Notes, amendments, and revision history
Amendments
[51 FR 31213, Sept. 2, 1986, as amended at 54 FR 40059, Sept. 29, 1989; 63 FR 36606, July 7, 1998]
Authority
Authority: 47 U.S.C. 151-155, 301-609; 3 U.S.T. 3450, 3 U.S.T. 4726, 12 U.S.T. 2377.
Source
Source: 51 FR 31213, Sept. 2, 1986, unless otherwise noted.
Amendments
[51 FR 31213, Sept. 2, 1986, as amended at 54 FR 40059, Sept. 29, 1989; 63 FR 36606, July 7, 1998]