[问答题]Virtually all navigable waters of the world are covered by the operational satellites in the Inmarsat system. Each satellite transmit EGC traffic on a designated channel. The EGC channel is optimized to enable the signal to be monitored by a small receive only ship earth station which is dedicated to the reception of EGC messages. As each message will also have a unique identity, the printing of messages already received correctly is automatically suppressed. Reception of certain types of message, such as shore-to-ship distress alerts and meteorological and navigational warnings, are mandatory and cannot be suppressed by ships in the affected area.
[单选题]NAVTEX transmitter identification character B3 is a single unique letter which is allocated to each Navtex____
[单选题]Equipment shall be so designed that the main units can be ____readily, without elaborate recalibration or readjustment.
[单选题]If the beacon is mounted at a wrong place, it may ____by sea water ,chemicals , exhaust and vibration .
[单选题]By using ---system a ship can send a distress message and know with certainty it will be received.
[问答题]The NAVTEX system was first tried out in Sweden in 1977.NAVTEX was then extended to NAVAREA 1,which covers the sea areas off ?IT is an international automated direct-printing service for the promulgation of navigational a meteorological warning and urgent information between developed to provide a low-coat,simple and automated means of receiving maritime safety information on board ships at sea and in coastal fulfils an integral role in the GMDSS and is also a components of the WWMWS
[单选题]A ELT beacon operating in ____ frequency band through the COSPAS-SARSAT system is located on board a ship.
[问答题]The requirements of medical fitness,especially as to hearing,eyesight and speech,should be met by the candidate befor training is commenced. The training should be relevant to the providions of the STCW Convention,the Radio Regulations and the SOLAS Convention currently in force,with particular attention given to provisions for the global maritime distress and safety system.In developing training requirements,account should be taken of at least the knoledge and training given in paragraphs 17 to 28 hereunder.