百度试题 结果1 题目60.What is the approximate range of VHF radio waves propagation? A. 300 nautical miles B. 30 〜50 nautical miles C. 200 nautical miles D. 400 nautical miles 相关知识点: 试题来源: 解析 B 反馈 收藏
What is the approximate range of VHF radio waves propagation?A.300 nautical miles.B.30-50 nautical miles.C.200 nautical miles.D.400 nautical miles.的答案是什么.用刷刷题APP,拍照搜索答疑.刷刷题(shuashuati.com)是专业的大学职业搜题找答案,刷题练习的工具.一键
What is defined as the area within the radiotelephone coverage area of at least one VHF coast station in which continuous DSC alerting is available as defined by the IMO regulation for GMDSS? A.Ocean area regions AOR-E, AOR-W, POR or IOR....
What does “VHF” stand for() A、echo sounder B、radar C、direction finder D、radiotelephone 免费查看参考答案及解析 题目: 情景交际1. How old is your sister A. Yes, she does. 2. What does your brother do B. She is five years old.3. What do you like to do C. I like to pla...
likecordless phonesand cell phones. Antennas are made of wires, metal rods, and sometimes other materials. Radio waves, more properly called radio frequencies (RF), are divided into a number of frequency ranges. VHF is one of theradio frequencyranges, and a VHF antenna is an antenna specifica...
Initiate an ARQ call to a coast station and wait for the automatic exchange of answer backs.
Tips for the Best User Experience: 1) Handling the "Server is busy" Message If you encounter a "Server is busy" pop-up when starting the remote connection with SDR#, don’t worry! Simply wait a few seconds and try reconnecting. This delay happens because the boot-up sequence of our re...
UHF VHF Tetra Two Way Radio Bts Coupling Fiber Optic Repeater Features 1 Waterproof box suitable for outdoor service; 2 Metal cavity filter technology inside, which gives wider receiving and sending separation, better gain flatness, higher stability, and lower noise figure...
is known as the radio spectrum. For example, the VHF (very high frequency) band, which ranges from 30-300 MHz, is being used for FM radio, TV broadcasts, and amateur radio and its counterparts. For a lot of electronic communication devices, the ultra-high frequency (UHF) band is being...
For children under 7, we recommend you take their own lifejacket which is the right size for your child. navigational equipment:VHF radio equipment, compass, hand bearing compass, steering compass, GPS, depth sounder, outside steering position, rudder angle indicator, rev-counter, sea charts, ...