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Sec. 81.138 Special requirements for radar trans

mitters. 81.139 Apparatus for generating automat

ically the radiotelephone alarm

signal. 81.140 Spurious emission limitations. 81.142 Modulation requirements.

Subpart F-Operator Requirements 81.151 Graded values of commercial radio

operator authorizations. 81.152 Operator required. 81.154 Limitations applicable to commer

cial radio operator permits. 81.155 Control by operator. 81.156 Adjustment of transmitting appara

tus. 81.158 Waivers of operator requirement. 81.159 Posting of operator authorization.

Subpart G-General Operating Requirements 81.171 International Regulations applicable. 81.172 Cooperative use of frequency assign

ments. 81.173 Secrecy of communication. 81.174 Unauthorized transmissions. 81.175 Suspension of transmission. 81.176 Service of public coast stations. 81.177 Service of limited coast stations and

marine-utility stations. 81.178 General obligations of coast stations. 81.179 Message charges. 81.180 Priority of communications to bo

observed. 81.181 Order of priority of communications. 81.182 Control by coast station. 81.183 Prevention of interference. 81.184 Transmission of traffic lists by coast

stations. 81.185 Transmission to plurality of mobile

stations, 81.186 Hours of service of stations on land. 81.187 Procedure relative to distress com

munication. 81.188 Radiotelegraph and radiotelephone

alarm signals. 81.189 Use of alarm signals. 81.190 Radiotelegraph watch by coast sta

tions. 81.191 Radiotelephone watch by coast sta

tions. 81.192 Maintenance tests. 81.193 Inspection of antenna tower lighting. 81.194 Maintenance of station log.

Subpart H-Coast Stations, Use of Telegraphy 81.201 Supplemental eligibility require

ments for public coast station au

thorization. 81.202 Points of communication. 81.203 Supplemental eligibility require

ments for limited coast station

authorization. 81 204 Points of communication of limited

coast stations. 81.206 Nature of service of limited coast

stations. 81.206 Assignable frequencies. 81.207 Frequencies for call and reply.

Sec. 81.208 Frequencies for working. 81.209 Use of Morse Code required. 81.210 Identification of stations. 81.211 Procedure in testing. 81.212 Radiotelegraph operating proceduro. 81.213 Station documents. 81.214 Station records. Subpart - Public Coast Stations, Use of

Telephony 81.801 Supplemental eligibility require

ments. 81.302 Points of communication. 81.303 Duplication of facilities. 81.304 Frequencies available. 81.305 Frequencies for calling and distress. 81.306 Frequencies available below 27.5

MC/s. 81.310 Identification of station. 81.811 Procedure in testing. GENERAL RADIOTELEPHONE OPERATING

PROCEDURE 81.312 General radiotelephone operating

procedure. 81.313 Station documents. 81.314 Station records. Subpart -Limited Coast Stations and Marine

Utility Stations, Use of Telephony 81.351 Supplemental ellgibility require

ments. 81.352 Cooperative use of facilities. 81.354 Points of communication. 81.355 Nature of service. 81.356 Assignable frequencies in the band

156–162 Mc/s. 81.368 Conditions imposed upon assign

ments in the 156–174 Mc/s band. 81.361 Frequencies available between 4 and

27.5 MC/8. 81.362 Limitations on use of marine-utility

stations. 81.364 Time limitation on communication. 81.365 Availability of 2738, 2830, and 2214

kc/8 for limited coast stations. 81.366 Availability of 2182 kc/8 for limited

coast stations. 81.367 Procedure in testing. 81.368 General radiotelephone operating

procedure. 81.369 Station documents. 81.370 Station records. 81.371 Use of U.S. Government frequencies

for telephony. 81.372 Station identification. Subpart K-Stations on Land in the Maritime

Radiodetermination Service 81.401 Limitation on station authorizations. 81.402 Assignable frequencies. 81.403 Special conditions imposed. Subpart 1Fixed Stations Associated with the

Maritime Mobile Service

MARINE FIXED STATIONS 81.451 Supplemental eligibility require

ments. 81.452 Points of communication.

$8L1 Basis and purpose. 81.453 Snowing of needi. 81.454 Frequencies available

(a) The basis for the rules in this part 21.455 Tecanical requirements.

is the Communications Act of 1934, as 81.456 Scope of comentamiestion

amended, and applicable treaties and 81.457 Station documents.

agreements to which the United States 81.458 Station records

is a party. The rules in this part are 81.459 Station identification.

issued pursuant to the authority con81.450 Procedure fa testing 21.461 Operating procedure.

tained in the Communications Act of

1934, as amended, which vests authority MEINE RECEIVER-TZET STATIONS in the Federal Communications Com. 81.471 Ziigibility requirements.

mission to rezulate common carriers of 81.472 Scope of service.

interstate and foreign communications, 81.473 Assignable frequencies.

to regulate radio transmissions and to 21.474 Technical requirements.

issue licenses for radio stations. 81.475 Station identification. 61476 Operating limitations.

b) The purpose of the rules and regu81.477 Station records.

lations in this part is to prescribe the

manner in which portions of the radio Subpart Developmental Stations spectrum may be made available for the $1.501 Supplemental eligibility.

use of radio for maritime operations €1.502 showing and statement required which require radio transmitting faci. 81503 Assignable frequencies.

ities on land 81.504 Cse of developenental stations.

(ZB PR. 12982, Dec. 21, 1963) 81.505 Developmental program 81.506 Report of operation required.

Subpart A-Definition of Terms 81.507 Identification of station

Socecz: The provisions de tais Subpert A Subpert N—Stefions Operated in the Land Mobile appear at 23 PR. 13694, Dec. 21, 1963, tamless Service for Maritime Porposes

otberwise noted. 81.521 Ziigibility for shipyard base stations.

$ 81.2 General. 81.522 Eligibility for shipyard mobile sta

(a) International Radio Regulations. 81.523 Showing precedent to shippad base The Radio Regulations in force annexed station authorization

to the International Telecommunication 81.524 Showing precedent to shippud so bile station authorization

Convention, Geneva, 1959, as between 81.525 Limitatios ca number of shipyard

the Government of the United States and mobile stations.

other Contracting Governments; and 81.526 Poćnts of communication

such preceding international radio rezu. 81.327 Limitations on tse.

lations as remain in force between the 81523 Scope of communication

Government of the United States and 81.522 Assignable frequencies.

other Contracting Governments. 81.380 Technical requirements.

b) Telecommunication. Any trans81.531 Coopezatite use of facilities. 81582 General operating procedure.

mission, emission, or reception of signa 81533 Identification of stations.

signals, writing, images, and sounds o 81.534 Procedure in testing

intelligence of any nature by wire, radio, 81.535 Station documenta.

optical or other electromagnetic 81.536 Station records.

systems.

(e) Radiocommunication. TelecomSubpart a_Vislations

munication by means of radio waves 81.551 Answers to notice of violation

(d) Public correspondence. Any tele81.582 Reports of infringements of the 1s. communication which the vices and

ternational Radio Regulations. stations must, by reason of thetr being Subpost ? Certain Operational Fixed Stefions

at the disposal of the publie, accept for Associated within the Maritime Mobile Service

transmission 81.501 Service authorized

(e) Station. One or more transmit81.502 Eisgibility requirements.

ters or receivers or a combination of 81.503 Frequencies arailable to operational

transmitters and receivers, incinding the Szed stations

accessory equipment, necessary at one 21.504 Technical requirements.

Location for carrying on a radiocomAUTETT: The provisions of this part 1

munication service. Each station shall isesed under 43 Stat 1056, 1082, s amended,

be classified by the service in which 47 USC. 154, 300, unless otherwise soted operates permanentiy of temporarily. Interpret o appiy 49 Stat. 1084-1088, 1081- 0 Station authorization. Any valid 1:05, as amendet: 47 USC. 151–155, 301-699. construction permit, station license,

special temporary authority for use of a station, issued by the Commission.

(g) Person. Includes an individual, partnership, association, joint stock company, trust, or corporation.

(h) Permittee. A person who holds a valid station construction permit.

(i) Hours of service. The period of time during each calendar day when a station is used, in conformity with the terms of the station authorization, for the rendition of its normal service.

(j) Day. Where the word "day" is applied to the use of a specific frequency assignment or to a specific authorized transmitter power, such use of the word "day" shall be construed to mean transmission on such frequency assignment or with such authorized transmitter power during that period of time included between 1 hour after local sunrise and 1 hour before local sunset.

(k) Radio district. The territory within each radio district, and the address of the Engineer in charge of each radio district, is set out in $ 0.121 of this chapter.

(1) Commercial transport vessel. Any ship or vessel which is used primarily in commerce (1) for transporting persons or goods to or from any barbor(s) or port(s) or between places within a harbor or port area, or (2) in connection with the construction, change in construction, servicing, maintenance, repair, loading, unloading, movement, piloting, or salvaging of any other ship or vessel.

(m) Mile. As used in this part, the term “mile" means a statute mile or 5,280 feet.

(n) Installed. As used in this part with respect to the requirements of radio apparatus in stations on land subject to this part, the term "installed" means in. stalled in the particular station or vehicle to which the pertinent rule or regulation involving the use of this term is applied.

(0) Shipyard land mobile unit. А land vehicle operated and controlled by a shipyard and used for the transportation of shipyard personnel, material, or supplies. $ 81.3 Maritime mobile service.

(a) Mobile service. A service of r&diocommunication between mobile and land stations, or between mobile stations.

(b) Maritime and land mobile seroice-(1) Maritime mobile service. A mobile service between coast stations and

ship stations, or between ship stations, in which survival craft stations may also participate. (Aircraft stations, when transmitting on frequencies allocated to the maritime mobile service, may communicate in this service with ship stations and coast stations.)

(2) Land mobile service. A mobile service between base stations and land mobile stations, or between land mobile stations. (Only land mobile service carried on exclusively for maritime purposes is governed by this part.)

(c) Mobile station. A station in the mobile service intended to be used while in motion or during halts at unspecified points.

(d) Land station. A station in the mobile service not intended to be used while in motion.

(e) Coast station. A land station in the maritime mobile service.

(f) Public coast station. A coast station open to public correspondence.

(g) Limited coast station. A coast station, not open to public correspondence, which serves the operational and business needs of ships.

(h) Class I coast station. A coast station (public or limited) licensed to provide a maritime mobile service to ships at sea, including such service over distances up to several thousand miles, whose frequency assignment for this purpose includes appropriate frequencies below 150 kc/s or between 5,000 kc/s and 25,000 kc/s.

(1) Class II coast station. A coast station (public or limited) licensed to provide a maritime mobile service, primarily of a regional character, whose frequency assignment does not include any frequency below 150 kc/s or between 5.000 kc/s and 25,000 kc/s except on a secondary basis under specified conditions intended to minimize the possibility of interference to other stations having priority on these frequencies.

(j) Class III coast station. A coast station (public or limited) licensed to provide a maritime mobile service, primarily of a local character, whose frequency assignment does not include any frequency below 25,000 kc/s.

(k) Operational designator. The letter "A", "B", or "F", appended to the term "class I”, “class II", or "class III", as these terms are defined in paragraphs (h), (i), and (j) of this section, designates that the coast station is licensed to render its normal service by means of

(A) telegraphy, (B) telephony, or (F) the same licensee within a local geofacsimile. The designator “L” means graphic area designated by the Commis"local" and is used to indicate (in lieu sion. of a separate class VII coast station license for the same station) that a class

§ 81.4 Maritime radiodetermination I or a class II station provides mari

service. time mobile service of a local char

(a) Radiodetermination. The deter. acter on a frequency or frequencies above mination of position, or the obtaining 30 Mc/s in addition to its service on other

of information relating to position, by frequencies. Operational designators are

means of the propagation properties of used individually or in combinations of

radio waves. two or more, as may be appropriate to a

(b) Radiodetermination service. A particular coast station. Examples of

service involving the use of radiodetercoast station classification for regulatory

mination. and administrative purposes in accord

(c) Maritime radiodetermination seroance with these rules: Public I-A, Public

ice. A radiodetermination service inNII-B, Limited 1-A, Limited MI-BF,

tended for the benefit of ships. Public II-AB, Public II-BL, Public I-AL,

(d) Radionavigation. Radiodetermi. etc.

nation used for the purposes of naviga(1) Marine-utility coast station. A tion, including obstruction warning. coast station, readily portable for use as

(e) Radionavigation service. A radioa limited coast station at unspecified

determination service involving the use points ashore within a designated local

of radionavigation. area.

(1) Maritime radionavigation service. (m) Marine-utility ship station. A A radionavigation service intended for ship station, readily portable for use as a

the benefit of ships. limited ship station on mobile vessels (g) Radionavigation land station. A within a designated local area.

station in the radionavigation service (n) Marine-utility station. A coast or not intended to be used while in motion. ship station in the maritime mobile sery

(h) Shore radionavigation station. A ice having a frequency assignment which

radionavigation land station performing is available for both marine-utility coast a maritime radionavigation service. stations and marine-utility ship stations

(1) Radar. A radiodetermination sysand licensed under one station authori. tem based on the comparison of referzation to operate as either a marine-util

ence signals with radio signals reflected, ity coast station or a marine-utility ship or retransmitted, from the position to be station according to its location, pursuant determined. to the provisions of paragraphs (1) and

() Shore radar station. A shore re(m) of this section, at the time it is dionavigation station utilizing radar. being operated

(k) Radiolocation. Radiodetermina(0) Base station. A land station in tion used for purposes other than those the land mobile service carrying on & of radionavigation. service with land mobile stations.

(1) Radiolocation service. A radiode(p) Shipyard base station. A land termination service involving the use of station, licensed and operated primarily

radiolocation. as a limited coast station in the maritime

(m) Maritime radiolocation service. mobile service, which is authorized ad

A radiolocation service intended for the ditionally to be operated on a secondary

benefits of ships.

(n) Radiolocation land station. A basis as a base station for communication with shipyard mobile stations of the

station in the radiolocation service not

intended to be used while in motion. same licensee within a local geographic

(0) Shore radiolocation station. А area designated by the Commission.

radiolocation land station performing a (q) Land mobile station. A mobile maritime radiolocation service. station in the land mobile service capa- (p) Shore radiolocation training stable of surface movement within the geo- tion. A shore radiolocation station graphical limits of a country or conti- used solely to train and qualify pernent.

sons in the effective use of maritime (r) Shipyard mobile station. A land radiodetermination. mobile station on a shipyard land mobile (q) Shore radiolocation test station. unit used for communication solely with A shore radiolocation station used solely one or more shipyard base stations of for testing maritime radiodetermina

tion apparatus incident to its manufacture, installation, repair, servicing, or maintenance. $ 81.5 Maritime fixed services.

(a) Fixed service. A service of radiocommunication between specified fixed points.

(b) Fixed station. A station in the fixed service.

(c) Operational fized station. A fixed station, not open to public correspondence, operated by and for the sole use of those agencies operating their own radiocommunication facilities in the public safety, industrial, land transportation, marine, or aviation services.

(d) Marine fixed station. A fixed station, used primarily for safety communication which is established at a designated location in a water area of, or contiguous to, the United States, and isolated from the mainland by water or marsh.

(e) Marine control station. An operational fixed station used to control the emissions or operation of a coast station at a separate location.

(1) Marine repeater station. An operational fixed station used to retransmit. to a point of destination or to a message routing center, radiocommunications received at a coast station from ship or aircraft stations in the maritime mobile service.

(g) Marine relay station. An operational fixed station used for communication between coast stations or between a coast station and an associated remote control point, which is intended to expedite the movement of message traffic to or from mobile stations in the maritime mobile service.

(h) Marine receiver-test station. A fixed station used to simulate transmission from a ship station to a coast station for the purpose of periodically testing the normal receiving installation of a licensed coast station to determine that such receiving installation is in good working condition. 8 81.6 Developmental maritime stations

on land. (a) Development land station. A land station operated for the express purpose of developing equipment or a technique solely for use only in that portion of the non-government mobile service which has been specifically allocated the authorized frequency (or frequencies) of the developmental land station.

(b) Developmental radiodetermination station. A radiodetermination station operated for the express purpose of developing equipment or å technique solely for use only in that portion of the non-Government radiodetermination service (including the non-Government radionavigation service) which has been specifically allocated the authorized frequency (or frequencies) of the developmental radiodetermination station.

(c) Developmental fred station. А fixed station operated for the express purpose of developing equipment or a technique solely for use only in that portion of the non-government fixed service which has been specifically allocated the authorized frequency (or frequencies) of the developmental fixed station.

(d) Specific classifioation. The specific classes of developmental stations on land licensed in the maritime mobile service, the maritime radiodetermination service (including maritime radionavigation service), and the maritime fixed services, are the same as classes defined in preceding sections of this part; however, for purposes of identification, the particular class of station is followed by the parenthetical indicator "(developmental)"; for example: “Public class III coast station (developmental)". § 81.7 Operational.

(a) Safety communication. The transmission or reception of distress, alarm, urgency, or safety signals, or any communication preceded by one of these signals, or any form of radiocommunication which, if delayed in transmission or reception, may adversely affect the safety of life or property.

(b) Superfluous radiocommunication. Any transmission that is not necessary in properly carrying on the service for which the station is licensed.

(c) Harmful interference. Any emission, radiation, or induction which endangers the functioning of a radionavigation service or of other safety services, or seriously degrades, obstructs, or repeatedly interrupts a radiocommunication service operating in accordance with regulations in this chapter.

(d) Distress signal. (1) The distress signal is the international radiotelegraph or radiotelephone signal which indicates that a ship, aircraft, or other vehicle is threatened by grave and imminent danger and requests immediate assistance.

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