IEC 62238 pdf download Maritime navigation and radiocommunication equipment and systems – VHF radiotelephone equipment incorporating Class “D” Digital Selective Calling (DSC) – Methods of testing and required test results
This International Standard covers the minimum requirements for general communicationfor shipborne fixed installations using a VHF radiotelephone incorporating class “D”DigitalSelective Calling.
These requirements include the relevant provisions of the lTU Radio Regulations，ITU-RRecommendations M.493-10 where class D is defined, and incorporate the relevant guidelinesof the lMO as detailed in MSC/Circ.803,MSC/Circ.862 and Resolution MSC.131(75).
This standard also specifies technical characteristics,methods of measurement and requiredtest results.
Recommended standards for equipment intended to work in high level electromagneticenvironments are described and included in annex D.
The following referenced documents are indispensable for the application of this document.For dated references, only the edition cited applies.For undated references, the latest editionof the referenced document (including any amendments) applies.
IEC 60945,Maritime navigation and radiocommunication equipment and systems – Generalrequirements – Methods of testing and required test results
IEC 61162-1，Maritime navigation and radiocommunication equipment and systems – Digitalinterfaces – Part 1: Single talker and multiple listeners
IMO Resolution MSC.131(75):2002，Maintenance of a continuous listening watch on VHFchannel 16 by SOLAs ships whilst at sea and installation of VHF DsC facilities on non-sOLAS ships
IMO MSC/Circ.803: Participation of non-SOLAs ships in the Global Maritime Distress andSafety System (GMDss)
IMO MSC/Circ.862: Clarifications of certain requirements in lMO performance standards for GMDSsequipment
ITU Radio Regulations，Appendix S18: 1998,Table of transmitting frequencies in the band156-174 MHz for stations in the maritime mobile service
ITU-R Recommendation M.493-10，Digital selective-calling system for use in the maritimemobile service
AIS Universal shipborne automatic identification system
DSC Digital selective calling
e.m.f. electromotive force
EPIRB Emergency position-indicating radiobeacon
EUT Equipment under test
FM Frequency modulation
IF Intermediate frequency
IMO International Maritime Organization
MMSI Maritime mobile service identity
RF Radio frequency
r.m.s. root mean square
SINAD Signal + noise + distortion to noise + distortion
VHF Very high frequency
VTS Vessel traffic system
4 General and operational requirements
The manufacturer shall declare that compliance to the requirements of clause 4 is achieved and shall provide relevant documentation if requested.
The equipment shall, as a minimum, include
– a VHF radiotelephone transmitter;
– a VHF radiotelephone receiver;
– a channel 70 watchkeeping facility for DSC decoder;
– a DSC encoder; and
– a DSC decoder.
The mechanical and electrical construction and finish of the equipment shall conform in all respects to good engineering practice, and the equipment shall be suitable for use on board vessels.
All controls shall be of sufficient size to enable the usual control functions to be easily performed and the number of controls should be the minimum necessary for simple and satisfactory operation.