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[接上页] be interrupted other than for brief intervals when the ship''s receiving capability is impaired or blocked by its own communications or when the facilities are under periodical maintenance or checks. .3 Digital selective calling (DSC) means a technique using digital codes which enables a radio station to establish contact with, and transfer information to, another station or group of stations, and complying with the relevant recommendations of the International Radio Consultative Committee (CCIR). .4 Direct-printing telegraphy means automated telegraphy techniques which comply with the relevant recommendations of the International Radio Consultative Committee (CCIR). .5 General radiocommunications means operational and public correspondence traffic,other than distress, urgency and safety messages, conducted by radio. .6 INMARSAT means the Organization established by the convention on the International Maritime Satellite Organization (INMARSAT) adopted on 3 September 1976. .7 International NAVTEX Service means the co-ordinated broadcast and automatic reception on 518 kHz of maritime safety information by means of narrow-band direct-printing telegraphy using the English language.* [* Reference is made to the NAVTEX manual approved by the Organization.] .8 Locating means the finding of ships, aircraft, units or persons in distress. .9 Maritime safety information means navigational and meteorological warnings, meteorological forecasts and other urgent safety related messages broadcast to ships. .10 Polar orbiting satellite service means a service which is based on polar orbiting satellites which receive and relay distress alerts from satellite EPIRBs and which provides their position. .11 Radio Regulations means the Radio Regulations annexed to, or regarded as being annexed to, the most recent International Telecommunication Convention which is in force at any time. .12 Sea area A1 means an area within the radiotelephone coverage of at least one VHF coast station in which continuous DSC alerting in available, as may be defined by a Contracting Government.** [** Reference is made to the recommendation on the provision of radiocommunication services for the global maritime distress and safety system(Assembly resolution A.659 (16)).] .13 Sea area A2 means an area, excluding sea area A1, within the radiotelephone coverage of at least one MF coast station in which continuous DSC alerting is available,as may be defined by a Contracting Government.* [* Reference is made to the recommendation on the provision of radiocommunication services for the global maritime distress and safety system (Assembly resolution A.659 (16)).] .14 Sea area A3 means an area, excluding sea areas A1 and A2, within the coverage of an INMARSAT geostationary satellite in which continuous alerting is available. .15 Sea area A4 means an area outside sea areas A1, A2 and A3. 2 All other terms and abbreviations which are used in this chapter and which are defined in the Radio Regulations shall have the meanings as defined in those Regulations. Regulation 3 Exemptions 1 The Contracting Governments consider it highly desirable not to deviate from the requirements of this chapter; nevertheless the Administration may grant partial or conditional exemptions to individualships from the requirements of regulations 7 to 11 provided: .1 such ships comply with the functional requirements of regulation 4; and .2 the Administration has taken into account the effect such exemptions may have upon the general efficiency of the service for the safety of all ships. 2 An exemption may be granted under paragraph 1 only: .1 if the conditions affecting safety are such as to render the full application of regulations 7 to 11 unreasonable or unnecessary; .2 in exceptional circumstances, for a single voyage outside the sea area or sea areas for which the ship is equipped; or .3 prior to 1 February 1999, when the ship will be taken permanently out of service within two years of a date prescribed by regulation 1 for the application of a requirement of this chapter. 3 Each Administration shall submit to the Organization, as soon as possible after the first of January in each year, a report showing all exemptions granted under paragraphs 1 and 2 during the previous calendaryear and giving the reasons for granting such exemptions. Regulation 4 Functional requirements 1 Every ship, while at sea, shall be capable: .1 except as provided in regulations 8.1.1 and 10.1.4.3, of transmitting ship-to-shore distress alerts by at least two separate and independent means, each using a different radiocommunication serv |