ETSI EN 301 403 V1.1.1 (2003-05)
Electromagnetic compatibility and Radio spectrum Matters (ERM); Maritime Mobile Earth Stations (MMES) operating in the 1,5 GHz and 1,6 GHz bands providing voice and direct printing for the Global Maritime Distress and Safety System (GMDSS); Technical characteristics and methods of measurement
Electromagnetic compatibility and Radio spectrum Matters (ERM); Maritime Mobile Earth Stations (MMES) operating in the 1,5 GHz and 1,6 GHz bands providing voice and direct printing for the Global Maritime Distress and Safety System (GMDSS); Technical characteristics and methods of measurement
DEN/ERM-TGMAR-034
Elektromagnetna združljivost in zadeve v zvezi z radijskim spektrom (ERM) – Pomorske mobilne zemeljske postaje (MMES), ki delujejo v frekvenčnih pasovih 1,5 GHz in 1,6 GHz ter zagotavljajo prenos govora in neposredno tiskanje za globalni pomorski nujnostni in varnostni sistem (GMDSS) – Tehnične karakteristike in merilne metode
General Information
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.HElectromagnetic compatibility and Radio spectrum Matters (ERM); Maritime Mobile Earth Stations (MMES) operating in the 1,5 GHz and 1,6 GHz bands providing voice and direct printing for the Global Maritime Distress and Safety System (GMDSS); Technical characteristics and methods of measurement47.020.70Navigacijska in krmilna opremaNavigation and control equipment33.100.01Elektromagnetna združljivost na splošnoElectromagnetic compatibility in general33.060.99Druga oprema za radijske komunikacijeOther equipment for radiocommunicationsICS:Ta slovenski standard je istoveten z:EN 301 403 Version 1.1.1SIST EN 301 403 V1.1.1:2003en01-december-2003SIST EN 301 403 V1.1.1:2003SLOVENSKI
STANDARD
ETSI ETSI EN 301 403 V1.1.1 (2003-05) 2
Reference DEN/ERM-TG26-034 Keywords GMDSS, maritime, MES, MMSS, radio, satellite, telex, voice ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE
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Important notice Individual copies of the present document can be downloaded from: http://www.etsi.org The present document may be made available in more than one electronic version or in print. In any case of existing or perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF). In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive within ETSI Secretariat. Users of the present document should be aware that the document may be subject to revision or change of status. Information on the current status of this and other ETSI documents is available at http://portal.etsi.org/tb/status/status.asp If you find errors in the present document, send your comment to: editor@etsi.org Copyright Notification No part may be reproduced except as authorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media.
© European Telecommunications Standards Institute 2003. All rights reserved.
DECTTM, PLUGTESTSTM and UMTSTM are Trade Marks of ETSI registered for the benefit of its Members. TIPHONTM and the TIPHON logo are Trade Marks currently being registered by ETSI for the benefit of its Members. 3GPPTM is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. SIST EN 301 403 V1.1.1:2003
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Contents Intellectual Property Rights.6 Foreword.6 Introduction.6 1 Scope.8 2 References.8 3 Definitions and abbreviations.9 3.1 Definitions.9 3.2 Abbreviations.10 4 General and operational requirements.11 4.1 General.11 4.2 General requirements.11 4.3 Operational requirements.11 4.4 Inter-operability.12 4.5 Interfaces.12 4.6 Safety.13 4.6.1 Radio frequency hazards.13 4.6.2 Safety precautions.13 4.6.3 Mechanical construction.13 4.6.4 Electrical safety.13 4.7 Marking and identification.13 4.8 Maintenance.14 4.9 Storage of software.14 4.10 Operational controls.14 4.11 Power supply.14 5 Technical requirement specifications.15 5.1 Unwanted emissions outside the band 1 626,5 MHz to 1 660,5 MHz.15 5.1.1 Justification.15 5.1.2 Specification.15 5.1.3 Carrier "off" Level.15 5.2 Maximum unwanted emissions within the 1 626,5 MHz to 1 660,5 MHz bands.16 5.2.1 Justification.16 5.2.2 Specifications.16 5.3 Control and Monitoring Functions (CMF).17 5.3.1 General.17 5.3.2 Processor monitoring.17 5.3.2.1 Justification.17 5.3.2.2 Specification.17 5.3.3 Transmit sub-system monitoring.17 5.3.3.1 Justification.17 5.3.3.2 Specification.18 5.3.4 Power-on/reset.18 5.3.4.1 Justification.18 5.3.4.2 Specification.18 5.3.5 Control Channel reception.18 5.3.5.1 Justification.18 5.3.5.2 Specification.18 5.3.6 Network control commands.18 5.3.6.1 Justification.18 5.3.6.2 Specification.18 5.3.7 Initial burst transmission.19 5.3.7.1 Justification.19 5.3.7.2 Specification.19 5.4 Electromagnetic compatibility.19 SIST EN 301 403 V1.1.1:2003
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6 General Test Conditions.19 6.1 Environmental profile.19 6.2 Manufacturer's declaration.19 6.3 Special test equipment.19 6.4 Test report.20 7 Environmental testing.20 7.1 Requirement.20 7.2 Testing.20 7.3 Results required.20 7.4 Performance test and check.20 7.4.1 Performance test.20 7.4.2 Performance check.20 8 Testing of the EUT.21 8.1 General.21 8.2 Telex, telephone and priority tests.21 8.2.1 Test procedure.21 8.3 Unwanted emissions tests.21 8.3.1 Measurement uncertainties.21 8.3.2 Measurement of unwanted emissions.22 8.4 Control and Monitoring Functions (CMF) tests.22 8.4.1 Processor monitoring.22 8.4.2 Transmit sub-system monitoring.22 8.4.3 Power-on/reset.22 8.4.4 Control Channel (CC) reception.22 8.4.5 Network control commands.22 8.4.6 Initial burst transmission.22 8.5 Electromagnetic compatibility tests.22 Annex A (normative): Standard Tests.23 A.1 Telex and Telephone Tests.23 A.1.1 Test A: Duplex telex test (EUT).23 A.1.2 Test B: Duplex telex test (STE).23 A.1.3 Test C: Simplex telex test (STE).24 A.1.4 Test D: Duplex telephone test (EUT).24 A.1.5 Test E: Duplex telephone test (STE).24 A.1.6 Results required.24 A.2 Priority tests.25 A.2.1 Procedure.25 A.2.2 Results required.25 Annex B (normative): Measurement of unwanted emissions.26 B.1 General.26 B.2 Test site.26 B.3 Test method.26 B.3.1 Installation.26 B.3.2 Receive test equipment.27 B.3.2.1 Measuring receiver for measurements up to 1 000 MHz.27 B.3.2.2 Spectrum analyser for measurements above 1 000 MHz.27 B.4 Procedure.27 B.4.1 Test arrangements.27 B.4.2 Unwanted emissions up to 1 000 MHz.28 B.4.3 Unwanted emissions above 1 000 MHz.29 Annex C (normative): Testing of MMES control and monitoring functions.30 C.1 General.30 C.1.1 Test arrangement.30 SIST EN 301 403 V1.1.1:2003
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C.1.2 Processor monitoring.31 C.1.2.1 Test method.31 C.1.3 Transmit subsystem monitoring.31 C.1.3.1 Test method.31 C.1.4 Power-on/Reset.32 C.1.4.1 Test method.32 C.1.5 Control Channel reception.32 C.1.5.1 Test method.32 C.1.6 Network control commands.33 C.1.6.1 Test method.33 C.1.7 Initial burst transmission.34 C.1.7.1 Test method.34 Annex D (informative): Antenna siting.35 Annex E (informative): Bibliography.36 History.37
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Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to ETSI. The information pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (http://webapp.etsi.org/IPR/home.asp). All published ETSI deliverables shall include information which directs the reader to the above source of information. Foreword This European Standard (Telecommunications series) has been produced by ETSI Technical Committee Electromagnetic compatibility and Radio spectrum Matters (ERM).
National transposition dates Date of adoption of this EN: 25 April 2003 Date of latest announcement of this EN (doa): 31 July 2003 Date of latest publication of new National Standard or endorsement of this EN (dop/e):
31 January 2004 Date of withdrawal of any conflicting National Standard (dow): 31 January 2004
Introduction The present document sets out the minimum operational and performance requirements, technical characteristics, methods of testing and required test results, for Maritime Mobile Earth Stations (MMES), capable of transmitting and receiving distress and safety communications using voice and direct-printing, as required by chapter IV, Regulations 8, 9, 10 and 14 of the 1988 amendments to the 1974 International Convention for the Safety of Life at Sea (SOLAS) [4], concerning radio communications for the Global Maritime Distress and Safety System (GMDSS).
NOTE 1: In order to meet the carriage requirements of the GMDSS in respect of receipt of the SafetyNETSM broadcasts, it is necessary to install an additional EGC receiver. SafetyNETSM is a service provided over a dedicated Inmarsat-C carrier, for the dissemination of maritime safety information, such as distress alerts, weather forecasts and coastal warnings. NOTE 2: When a requirement of the present document is in conflict with one in the MMES System Definition Manual (SDM), reference shall be made to the most recent IMO and ITU applicable documents to resolve the difficulty.
NOTE 3: For the purpose of the present document, the term "MMES" is used in order to align the present document to ITU and IEC terminology. It is defined as a Maritime Mobile Earth Station (MMES) operating in the GMDSS. The present document incorporates the performance standards of IMO Resolution A.808(19) [6]. It also incorporates the relevant ITU Radio Regulations [7]. The present document takes account of IMO Resolution A694(17) [5], to which EN 60945 [2] is associated. When a requirement in the present document is different from EN 60945 [2], the requirement in the present document shall take precedence. SIST EN 301 403 V1.1.1:2003
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Compliance to the present document does not signify compliance to any safety requirements. However, it is the responsibility of the assessor of the equipment that any observations regarding the given apparatus becoming dangerous or unsafe as a result of the application of the tests defined in the present document should be included in the test report. SIST EN 301 403 V1.1.1:2003
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1 Scope The present document provides specifications for the standardization of transmit/receive Maritime Mobile Earth Stations (MMES) operating in the 1,5 GHz and 1,6 GHz bands under the Global Maritime Distress and Safety Systems (GMDSS) in order to ensure general safety and limit interference to radio communication systems.
NOTE: The present document is for MMES equipment that meets the requirements of IMO A.808(19) [6] based systems only. The present document applies to MMES radio equipment, which have the following characteristics: - the MMES is ship mounted; - these MMES are controlled and monitored by a Network Control Facility (NCF). The NCF is outside the scope of the present document; - the MMES operates through geostationary satellites as part of a network providing voice, direct printing and data communications;
- the MMES is capable of operating within the frequency ranges given in table 1. Table 1: Mobile Satellite Service (MSS) frequency bands Direction of Transmission MSS frequency bands Transmit (earth to space) 1 626,5 MHz to 1 660,5 MHz Receive (space to earth) 1 525,0 MHz to 1 559,0 MHz
2 References The following documents contain provisions which, through reference in this text, constitute provisions of the present document. • References are either specific (identified by date of publication and/or edition number or version number) or non-specific. • For a specific reference, subsequent revisions do not apply. • For a non-specific reference, the latest version applies. Referenced documents which are not found to be publicly available in the expected location might be found at http://docbox.etsi.org/Reference. [1] CISPR 16-1: "Specification for radio disturbance and immunity measuring apparatus and
methods - Part 1: Radio disturbance and immunity measuring apparatus" (Annex G: Validation of the open area test site for the frequency range of 30 MHz to 1 000 MHz). [2] EN 60945 (1997): "Maritime navigation and radiocommunication equipment and systems; General requirements; Methods of testing and required test results". [3] EN 61162-1 (2000): "Maritime navigation and radiocommunication equipment and systems; Digital interfaces; Part 1: Single talker and multiple listeners". [4] IMO International Convention on Safety of Life at Sea (SOLAS) (1974). NOTE: See http://www.imo.org/Conventions/contents.asp?topic_id=257&doc_id=647 [5] IMO Resolution A.694(17): "General requirements for shipborne radio equipment forming part of the Global Maritime Distress and Safety System (GMDSS) and for electronic navigational aids". [6] IMO Resolution A.808(19): "Performance standards for ship earth stations capable of two-way communications". SIST EN 301 403 V1.1.1:2003
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[7] ITU Radio Regulations. [8] IMO MSC/Circular 862: "Clarification of certain requirements in IMO performance standards for GMDSS equipment 29.6.98". [9] IEC 61097-10 (1999): "Global maritime distress and safety system (GMDSS) -
Part 10: Inmarsat-B ship earth station equipment - Operational and performance requirements, methods of testing and required test results". 3 Definitions and abbreviations 3.1 Definitions For the purposes of the present document, the following terms and definitions apply. applicant: manufacturer or his authorized representative within the European Community or the person responsible for placing the apparatus on the market antenna gain: ratio, expressed in decibels, of the power that would have to be supplied to an isotropic radiator to the power supplied to the antenna being considered, so that they produce the same field strength at the same distance in the same direction carrier-off state: state in which MMES is when either it is authorized by the Network Control Facility (NCF) to transmit but when it does not transmit any signal, or when it is not authorized by the NCF to transmit carrier-on state: state in which MMES is when it is authorized by the NCF to transmit and when it transmits a signal carrier to noise density ratio: ratio of un-modulated carrier power to noise power normalized to a 1 Hz bandwidth conformance test: means whereby the equipment is proved to be in compliance with the specifications Control Channel (CC): channel or channels by which MMES receive control information from the NCF for their network environmental profile: range of environmental conditions under which equipment within the scope of EN 301 403 is required to comply with the provisions of EN 301 403 Equipment Under Test (EUT): for the purpose of EN 301 403 the EUT includes all units necessary for intended operation NOTE: This includes: - The Externally Mounted Equipment (EME); - The Internally Mounted Equipment (IME) including the data terminal equipment such as the keyboard; - Visual Display Unit (VDU), printer, direct printing equipment; - all interconnecting cables and power supply leads, etc. Equivalent Isotropically Radiated Power (EIRP): product of the power supplied to the antenna and the antenna gain in a given direction relative to an isotropic antenna (absolute or isotropic gain) Externally Mounted Equipment (EME): those of the modules of the Installable Equipment which are intended to be mounted externally to the ship as stated by the applicant NOTE:
This equipment is exposed to the weather. Installable Equipment (IE): equipment which is intended to be fitted to a ship NOTE: An IE may consist of one or several interconnected modules.
ETSI ETSI EN 301 403 V1.1.1 (2003-05) 10 Internally Mounted Equipment (IME): those of the modules of the IE which are not declared by the applicant as EME are defined as Internally Mounted Equipment (IME) NOTE: This equipment is protected from the weather. L-band: frequency band in the range 1,4 GHz to 1,7 GHz allocated to the mobile satellite service and in which the EUT transmits and receives nominated bandwidth: bandwidth of the MMES radio frequency transmission is nominated by the applicant NOTE 1: The nominated bandwidth is wide enough to encompass all spectral elements of the transmission necessary for communication and which have a level greater than the specified unwanted emissions limits. The nominated bandwidth is wide enough to take account of the transmit carrier frequency stability. NOTE 2: The nominated bandwidth is within the MSS transmit frequency band within which the MMES operates. out-of-band emissions: emission on a frequency or frequencies immediately outside the necessary bandwidth which results from the modulation process, but excluding spurious emissions ship earth station: MMES on board a ship Special Test Equipment (STE): specific equipment which enables the tests specified in EN 301 403 to be carried out spurious emission: emission on a frequency or frequencies which are outside the necessary bandwidth and the level of which may be reduced without affecting the corresponding transmission of information NOTE: Spurious emissions include harmonic emissions, parasitic emissions, intermodulation products and frequency conversion products but exclude out of band emissions. unwanted emissions: spurious emissions and out of band emissions falling outside the nominated bandwidth in the carrier-on state and those generated in the carrier-off state 3.2 Abbreviations For the purposes of the present document, the following abbreviations apply: CC Control Channel C/No Carrier to noise density ratio in 1 Hz bandwidth CMF Control and Monitoring Functions CR Carriage Return EGC Enhanced Group Call EIRP Equivalent Isotropically Radiated Power EMC Electro Magnetic Compatibility EME Externally Mounted Equipment EUT Equipment Under Test GMDSS Global Maritime Distress and Safety System
IE Installable Equipment IEC International Electrotechnical Commission IME Internally Mounted Equipment IMO International Maritime Organization ISO International Standards Organization ITU International Telecommunications Union LES Land Earth Station LF Line Feed LMES Land Mobile Earth Station MMES Maritime Mobile Earth Station MSS Mobile Satellite Service NCF Network Control Facility RF Radio Frequency SES Ship Earth Station SOLAS Safety Of Life At Sea SIST EN 301 403 V1.1.1:2003
ETSI ETSI EN 301 403 V1.1.1 (2003-05) 11 STE Special Test Equipment VDU Visual Display Unit 4 General and operational requirements 4.1 General This clause includes the requirements taken from SOLAS [4] and IMO Resolutions A.808(19) [6] and A.694(17) [5] for which no repeatable or verifiable test can be specified or for which the test is limited to the verification of documentation presented by the manufacturer. It contains all operational requirements, and manufacturers shall declare compliance with these requirements and provide documentary evidence. The requirements listed in this clause are in addition to the relevant operational requirements of EN 60945 [2]. The results of all visual and documentary verifications shall be recorded in the test report. 4.2 General requirements a) In accordance with SOLAS [4], Chapter IV, Regulation 10.1.1 a maritime mobile earth station (MMES) shall be capable of: 1) transmitting and receiving distress and safety communications using direct-printing; 2) initiating and receiving distress priority calls; 3) maintaining watch for shore-to-ship distress alerts, including those directed to specifically defined geographical areas. This requirement should normally be met by provision of an EGC receiver; 4) transmitting and receiving general radio communications, using either voice or direct-printing. b) The equipment shall be approved by the IMO approved MSS operator and shall comply with the environmental conditions specified in its technical requirements for MMES capable of two-way communications, as stated in IMO Resolution A.808(19) [6], clause 2. c) The equipment capable of voice and direct printing shall comply with the applicable general requirements set out in IMO Resolution A.694(17) [5] as detailed in EN 60945 [2] and IMO Resolution A.808(19) [6], clause 1. d) The equipment shall indicate the status of the distress alert transmission as stated in clause 4.2.9 of EN 60945 [2]. e) The equipment shall be provided with facilities which permit the testing of all operational indicators (warning, alarm and routine), displays, and audible devices as stated in clause 4.2.9 of EN 60945 [2]. In each case verification shall be performed by inspection of documentary evidence. 4.3 Operational requirements In order to comply with IMO Resolution A.808 [6], clause 3, a maritime mobile earth station (MMES) shall meet the following requirements or include facilities to allow them to be met on installation: a) No control external to the equipment shall be available for alterations of the MMES identity. b) It shall be possible to initiate and make distress calls by voice or direct printing from the position at which the ship is normally navigated and from any position designated for distress alerting. In addition, where a room is provided for radio communications, means to initiate distress calls shall also be fitted in that room. c) Where no other means of receiving distress, urgency and safety broadcasts or an additional distress alert relay are provided and existing levels of aural signals produced by the telephone or direct printing are considered to be inadequate, the MMES equipment shall be configured to actuate an aural/visual alarm of appropriate level. d) It shall be possible to interrupt and initiate distress calls at any time. SIST EN 301 403 V1.1.1:2003
ETSI ETSI EN 301 403 V1.1.1 (2003-05) 12 e) A distress call shall be activated only by means of a dedicated distress button. The dedicated button shall: - be clearly identified; and - be protected against inadvertent operation. NOTE: This button should not be any key of an ITU-T Recommendation E.161 input panel or an ISO keyboard associated with the equipment and should be physically separated from functional buttons/keys used for normal operation. This button should be a single button for no other purpose than to initiate a distress alert as stated in IMO MSC/Circular 862 [8], clause 1.1. f) The distress button should be red in colour and marked DISTRESS. Where a non-transparent protective lid or cover is used, it should also be marked DISTRESS, as stated in IMO MSC/Circular 862 [8], clause 1.2. g) The required protection of the distress button should consist of a spring loaded lid or cover permanently attached to the equipment by for example hinges. It. should not be necessary for the user to remove additional seals or to break the lid or cover in order to operate the distress button, as stated in IMO MSC/Circular 862 [8], clause 1.3. h) The distress call initiation shall require at least two independent actions:
- Lifting of the protective lid or cover is considered the first action, as stated in IMO MSC/Circular 862 [8], clause 1.4. - Pressing the distress button as specified is considered as the second independent action, as stated in IMO MSC/Circular 862 [8], clause 1.4. i) In addition to the operational requirements in g) above, the second action to initiate a distress call shall be by pressing the button once, for at least 3 s. A visual indication shall be provided immediately after a distress call has been initiated. This indication shall be made at all positions from where a distress call may be initiated, irrespective of the radio telephony or direct printing terminal from which the distress call is originated. The indication shall continue until reset manually. This reset facility shall only be available to authorized personnel. It shall be possible to initiate further distress calls without re-setting the first indication. The indication shall function identically during performance testing with distress priority. j) On initiation of a distress priority call the equipment shall interrupt any on-going call of lower priority, if necessary, and then set up the distress call automatically. In each case verification shall be performed by inspection of documentary evidence. 4.4 Inter-operability In order to comply with IMO Resolution A694(17) [5], clauses 1.2 and 3.5, respectively, a maritime mobile earth station (MMES) shall meet the following requirements: a) Where a unit of equipment provides a facility which is additional to the minimum requirements of the present document, the operation and, malfunction of such additional facility shall not degrade the performance of the equipment. b) If a unit of equipment is connected to one or more other units of equipment accepted by the manufacturer of the EUT, the performance of each of the latter shall be maintained. In each case verification shall be performed by inspection of documentary evidence. 4.5 Interfaces A maritime mobile earth station (MMES) shall meet the following requirements or include facilities to allow them to be met on installation, as stated in IEC 61097-10 [9]: a) An interface shall be provided to allow the user to initiate and make distress calls by telephony or direct printing from the position at which the ship is normally navigated and from any position designated for distress alerting. In addition, an interface shall be included to allow the initiation of distress calls from a room provided for radio communications, where such a room is provided onboard.
ETSI ETSI EN 301 403 V1.1.1 (2003-05) 13 b) An output shall be provided to actuate an external aural/visual alarm on the receipt of a distress call (see clause 4.3c). c) An MMES shall have an interface to receive information on the ship's position for inclusion in the initial distress alert. Such interface shall comply with EN 61162-1 [3]. Verification shall be performed by inspection of documentary evidence or demonstration. 4.6 Safety 4.6.1 Radio frequency hazards In order to permit warnings of potential hazards to be displayed in appropriate places, a label shall be attached to the radome indicating the distance at which radiation levels of 100 W/m2, 25 W/m2 and 10 W/m2 exist. The label shall have characters at least 20 mm high and be clearly readable in the normally installed position from a distance of at least 5 m, in accordance with IMO Resolution A.808(19) [6], clause 4. Conformance to the radiation levels labelling requirements shall be checked by visual inspection of the units. 4.6.2 Safety precautions The EUT shall satisfy the requirements for safety as stated in IMO Resolution A.694(17) [5], clause 7 and safety precautions as detailed in EN 60945 [2]. 4.6.3 Mechanical construction a) The equipment shall, as far as practicable, be constructed of non-flammable materials and shall have adequate strength to ensure safety. b) Equipment shall be mechanically designed to minimize the possibility of injury to persons, for example, from sharp edges or protruding corners. Verification shall be performed by visual inspection. 4.6.4 Electrical safety a) Accidental access to dangerous voltages shall be prevented. All parts and wiring in which the direct or alternating voltages or both, other than radio frequency voltages, combine to give a peak voltage greater than 50 V shall be protected against accidental access and shall be isolated automatically from all sources of electrical energy when the protective covers are removed. Alternatively, the equipment shall be so constructed that access to such voltages may only be gained after having used a tool for the purpose, such as a spanner or screwdriver, and warning labels shall be prominently displayed both within the equipment and on protective covers. b) Means shall be provided for earthing exposed metallic parts of the equipment. This shall not cause any terminal of the source of electrical energy to be earthed. Verification to the electrical safety requirements shall be checked by visual inspection of the units. 4.7 Marking and identification A maritime mobile earth station (MMES) shall meet the following requirements, as stated in IEC 61097-10 [9]: a) Each unit of the equipment shall be marked externally with the following information, which should be clearly visible in the normal installation position: 1) identification of the manufacturer; 2) equipment type number or model identification; and SIST EN 301 403 V1.1.1:2003
ETSI ETSI EN 301 403 V1.1.1 (2003-05) 14 3) serial number of the unit as stated in IMO Resolution A.694(17) [5], clause 9. b) Details of the labelling requirements shall comply with EN 60945 [2]. Verification shall be performed by visual examination. 4.8 Maintenance As stated in IMO Resolution A.694(17) [5], clause 8, the equipment shall be so: a) designed that the main units can be replaced readily, without elaborate re-calibration or readjustment; b) constructed that it is readily accessible for inspection and maintenance purposes. Verification shall be performed by visual examination. 4.9 Storage of software Any programming material or software that forms part of the MMES and which is necessary for meeting the GMDSS requirements shall be permanently installed in
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