VHF(Very high frequency)即甚高频无线通信系统,是一种无线电通信方式,由海岸电台和船载VHF设备组成,是船舶和船舶交通管理中心的主要通信手段。 三、VHF的功能 VHF应能使用话音和DSC进行下列种类的呼叫: (1)遇险、紧急和安全通信 (2)船舶操纵的要求 (3)公用业务通信 《国内航行海船法定检验技术规则》(2020)中要...
VHF(Very high frequency)即甚高频无线通信系统,是一种无线电通信方式,由海岸电台和船载VHF设备组成,是船舶和船舶交通管理中心的主要通信手段。 三、VHF的功能 VHF应能使用话音和DSC进行下列种类的呼叫: (1)遇险、紧急和安全通信 (2)船舶操纵的要求 (3)公用业务...
甚高频(Very-High Frequency,简称VHF)通信是近海和内河水上无线电移动通信业务的主要手段之一,在国际电信联盟(International Telecommunication Union,简称ITU)《无线电规则》(Radio Regulation,简称RR)附录18中,划分了VHF水上移动业务频率,规定在这些频段内,给予水上移动通信业务优先使用权。同时,在《无线电规则》第31条...
引言 甚高频(Very-High Frequency,简称VHF)通信是近海和内河水上无线电移动通信业务的主要手段之一,在国际电信联盟(International Telecommunication Union,简称ITU)《无线电规则》(Radio Regulation,简称RR)附录18中,划分了VHF水上移动业务频率,规定在这些频段内,给予水上移动通信业务优先使用权。同时,在《无线电规则》第...
dsc frequency ch 70 calling sensitivity symbol error rate 10-2, input -3 dbµv watch keeping continuous watch on ch 70 本产品的品牌是FURUNO,型号是FM-8500,类型是VHFDSC,新旧程度是8成新,设备所在地是上海,设备生产产地是日本,产品数量是10 所属分类:中国二手设备网 / 二手通讯产品本页链接:http:...
14. The DSCfrequency fordistress alertinginAreaA2is ___. A.2182KHZ B.2174.5KHZ C.2192KHZ D.2187.5KHZ 15. Whatchannel is general communicationused ? A.anyappropriate channel except public communication B.any appropriate channel except forpublic communications C.any appropriate channel besides public...
2)船舶遇险、紧急、安全通信频道 CH.16用于船舶遇险、紧急等的呼叫与通信; CH.70用于船舶遇险的数字选择呼叫(DSC); CH.06用于船舶/航空器间协调搜救行动的通信,我过规定用与船舶间的避让 。 CH.13用于船舶间有关航行安全的通信。 二、VHF无线电话 * 3.频道(Channel) 3)国际通用频道(ITU)与美国频道 一般...
Channel 70: A dedicated Digital Selective Calling (DSC) channel. DSC is an automated distress system that allows us to make digital phone calls through our VHFs. Is your VHF set up properly? Do I Need A License To Transmit On VHF Marine Radio? The FCC decided in 1996 that “volun...
Every A3 ship, while at sea, shall maintain a continuous watch:A.On VHF DSC channel 70B.On the distress and safety DSC frequency 2,187.5 KHz and 8,414.5 KHz and also on at least one of the distress and safety DSC frequencies 4,207.5 KHz, 6,..
(V1.1.1) • Full-duplex communications: FM-8800D • Precision PLL frequency synthesizer for high frequency stability as required for DSC operation • Dual Watch and Multiple Watch • Continuous DSC watch on CH70 • Prevention of accidental distress alert • File editing for emergency ...