§ 80.223 47 CFR Ch. I (10–1–97 Edition)
(3) The interval between successive able to be manually keyed. If provi- tones must not exceed 4 milliseconds; sions are made for automatically (4) The amplitude ratio of the tones transmitting the radiotelegraph alarm must be flat within 1.6 dB; signal or the radiotelegraph distress (5) The output of the device must be signal, such provisions must meet the sufficient to modulate the associated requirements in subpart F of this part. transmitter for H2B emission to at (d) Any EPIRB carried as part of a least 70 percent, and for J2B emission survival craft station must comply to within 3 dB of the rated peak enve- with the specific technical and per- lope power; formance requirements for its class (6) Light from the device must not contained in subpart V of this chapter. interfere with the safe navigation of the ship; [51 FR 31213, Sept. 2, 1986, as amended at 53 (7) After activation the device must FR 8905, Mar. 18, 1988; 53 FR 37308, Sept. 26, automatically generate the radio- 1988; 56 FR 11516, Mar. 19, 1991] telephone alarm signal for not less than 30 seconds and not more than 60 § 80.225 Requirements for selective seconds unless manually interrupted; calling equipment. (8) After generating the radio- This section specifies the require- telephone alarm signal or after manual ments for voluntary digital selective interruption the device must be imme- calling (DSC) equipment and selective diately ready to repeat the signal; calling equipment installed in ship and (9) The transmitter must be auto- coast stations. Reference to any CCIR matically switched from the stand-by Recommendation in this section is to condition to the transmit condition at the most recent CCIR approved Rec- the start and return to the stand-by ommendation that does not prevent condition at the conclusion of the ra- the use of existing equipment. diotelephone alarm signal. (a) DSC equipment voluntarily in- (d) Any device used by a station to automatically generate the radio- stalled in coast or ship stations must telephone alarm signal must be type meet either the requirements of CCIR accepted by the Commission. Recommendation 493 (including only equipment classes A, B, D, and E) or [51 FR 31213, Sept. 2, 1986, as amended at 54 RTCM Paper 56–95/SC101–STD. DSC FR 40059, Sept. 29, 1989] equipment must not be used with the § 80.223 Special requirements for sur- sensors referred to in § 80.179(e)(2). DSC vival craft stations. equipment used on compulsorily fitted (a) Survival craft stations capable of ships must meet the requirements con- transmitting on: tained in subpart W for GMDSS. (1) 500 kHz must be able to operate (b) Manufacturers of Class C DSC with class A2A and A2B or H2A and equipment to be used on United States H2B emissions; vessels must affix a clearly discernible (2) 2182 kHz must be able to operate permanent plate or label visible from with A2B and A3E or H2B and H3E and the operating controls containing the J2B and J3E emissions; following: (3) 8364 kHz must be able to operate Warning. This equipment is designed to with class A2A or H2A emission; and generate a digital maritime distress and (4) 121.500 MHz must be able to oper- safety signal to facilitate search and rescue. ate with A3E or A3N emission. To be effective as a safety device, this equip- (b) Survival craft stations must be ment must be used only within communica- able to receive the frequency and types tion range of a shore-based VHF marine of emission which the transmitter is channel 70 distress and safety watch system. capable of using. Where the transmit- The range of the signal may vary but under ter frequency is 8364 kHz the receiver normal conditions should be approximately must be able to receive A1A, A2A and 20 nautical miles. H2A emissions throughout the 8320–8745 (c) Selective calling equipment, other kHz band. than that designed in accordance with (c) Survival craft transmitters oper- paragraph (a) of this section, is author- ating on 500 kHz or on 8364 kHz must be ized as follows:
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(1) Equipment used in conjunction (b) Transmissions must sweep lin- with the Automated Maritime Tele- early in frequency at a rate of at least communications System (AMTS) in 60 kHz per second, occupying any 3 kHz the band 216–220 MHz, bandwidth for less than 50 milli- (2) Equipment used to perform a se- seconds; lective calling function during narrow- (c) The transmitter shall scan the band direct-printing (NB–DP) oper- band no more than four times per hour; ations in accordance with CCIR Rec- (d) Transmissions within 6 kHz of the ommendation 476 or 625, and following protected frequencies and (3) Equipment functioning under the frequency bands must not exceed 10 µW provisions of § 80.207(a) includes the peak ERP: brief use of radiotelegraphy, including (1) Protected frequencies (kHz) keying only the modulating audio fre- 2091.0 4188.0 6312.0 12290.0 16420.0 quency, tone signals, and other signal- 2174.5 4207.5 8257.0 12392.0 16522.0 ling devices to establish or maintain 2182.0 5000.0 8291.0 12520.0 16695.0 communications provided that: 2187.5 5167.5 8357.5 12563.0 16750.0 (i) These signalling techniques are 2500.0 5680.0 8364.0 12577.0 16804.5 not used on frequencies designated for 3023.0 6215.0 8375.0 15000.0 20000.0 general purpose digital selective call- 4000.0 6268.0 8414.5 16000.0 25000.0 ing (DSC) and distress and safety DSC 4177.5 6282.0 10000.0 calling as listed in § 80.359; (2) Protected bands (kHz) (ii) The authorized radiotelephone emission bandwidth is not exceeded; 4125.0–4128.0 (iii) Documentation of selective call- 8376.25–8386.75 ing protocols must be available to the 13360.0–13410.0 25500.0–25670.0 general public; and, (iv) Harmful interference is not (e) The instantaneous signal, which caused to stations operating in accord- refers to the peak power that would be ance with the International Radio Reg- measured with the frequency sweep ulations. stopped, along with spurious emissions generated from the sweeping signal, [54 FR 10009, Mar. 9, 1989, as amended at 62 FR 40306, July 28, 1997] must be attenuated below the peak car- rier power (in watts) as follows: § 80.227 Special requirements for pro- (1) On any frequency more than 5 Hz tection from RF radiation. from the instantaneous carrier fre- As part of the information provided quency, at least 3 dB; with transmitters for ship earth sta- (2) On any frequency more than 250 tions, manufacturers of each such unit Hz from the instantaneous carrier fre- must include installation and operat- quency, at least 40 dB; and ing instructions to help prevent human (3) On any frequency more than 7.5 exposure to radiofrequency (RF) radi- kHz from the instantaneous carrier fre- ation in excess of the RF exposure quency, at least 43 + 10log10 (peak guidelines specified in § 1.1307(b) of the power in watts) db. Commission’s Rules. [62 FR 40307, July 28, 1997] [53 FR 28225, July 27, 1988] Subpart F—Equipment Authoriza- § 80.229 Special requirements for auto- tion for Compulsory Ships matic link establishment (ALE). Brief signalling for the purposes of § 80.251 Scope. measuring the quality of a radio chan- (a) This subpart gives the general nel and thereafter establishing commu- technical requirements for type accept- nication shall be permitted within the ance of equipment used on compulsory 2 MHz–30 MHz band. Public coast sta- ships. Such equipment includes radio- tions providing high seas service are telegraph transmitters, radiotelegraph authorized by rule to use such signal- auto alarms, automatic-alarm-signal ling under the following conditions: keying devices, survival craft radio (a) The transmitter power shall not equipment, watch receivers, and radar. exceed 100 W ERP;
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