[问答题]************************Safety*************EGC Received message*********** REF:MSG-E3097 NAV WATNING NO:05/2006 17.04.06 FROM VIKRAM SARABHAI SPACE CENTRE. ROVKET LAUNCHINGS ARE SCHEDULED FROM THUMBA POSITION 8 DEG 31MIN 59 SEC NORTH 76 DEG 52MIN 03 SEC EAST DURING THE MONTH OF MAY 2006. DANGER ZONE ONE IS A SECTOR OF TADIUS 5 NM FROM THE LAUNCHER BETWEEN AZIMUTH ANGLES 190DEG AND 300DEG. DANGER ZONE TWO IS A SECTOR OF RADII 45 NM AND 75NM BETWEEN AZIMUTH ANGLES 220 DEG AND 260DEG THE DANGER TIME EXISTS FOR ZONE ONE AND TWO BETWEEN 1900 2230 HRS(INDIAN STANDARD TIME) ON 3 RD,4TH,10TH,11TH,17TH,18TH,24TH,25TH,AND 31ST MAY 2006. MARINERS ARE ADVISED TO KEEP WELL CLWAR THE ABOVE MENTIONED AREAS DURING THE PERIOD. ISSUED UNDER THE DIREVTIVES OF NS DDG(TECH). DG(S) COMMCENTRE,DIRECTORATE GENERAL OF SHIPPING. EMAIL:DGCOMMCENTRE AT SATYAMMAIL.NET. PHN:91-22 22610606,2614646 90-01-03 05:41
[单选题]ships of 30000tons gross tonnage and upwards shall be fitted with two ( ) each capable of being operated independently of the other
[单选题]Equipment shall be so designed that the main units can be ____readily, without elaborate recalibration or readjustment.
[单选题]When available, we should use ______ mode for transmissions from one coast or ship station to two or more other stations.
[单选题]In the case of a ship in distress , the need exists to create a temporary geographic area to ____ locating potential assisting ships.
[单选题]The transmission of a ________ indicates that a ship is in distress and requires immediate assistance.
[问答题]Making a telephone call is divided into two separate stages to establish a communication channel to its final destination. First, you should set up a channel from your terminal, via a satellite, to a CES within your ocean region. Then establish a channel from the CES, via the International Telephone Network to the addressee at the final destination. After you have finished the first stage, you should receive PTS tone from the CES, then you must immediately select the service and subscriber required. Within approximately 15 seconds you should receive the ringing tone of the called subscriber. When the subscriber answers this means that the telephone link to the subscriber has been established and the charging period begins. The charging period will end from the time when the link to the subscriber is disconnected.