Question 15Deck Safety70% to pass
Which system has the least effective radius of operation?
AI Explanation
The correct answer is D) VHF DSC.
The VHF DSC (Digital Selective Calling) system has the least effective radius of operation compared to the other options. VHF radio signals have a limited range, typically around 20-30 miles from the shore, whereas the other systems (NAVTEX, HF SITOR, and MF NBDP) have a significantly larger operational range, allowing for more effective communication over greater distances at sea.
NAVTEX, HF SITOR, and MF NBDP are all long-range maritime communication systems that can effectively transmit and receive information over hundreds of miles, making them more suitable for vessels operating in offshore or ocean environments. In contrast, the VHF DSC system is primarily designed for short-range communication and is less effective for vessels navigating in open ocean or distant from the coastline.
Related Questions
#13 All of the following are recognized distress signals under the Navigation Rules EXCEPT _______________.#14 One of the signals, other than a distress signal, that can be used by a rescue boat to attract attention is a/an _______________.#16 What is the action that a GMDSS Radio Operator should take when a DSC distress alert is received? #17 What is the primary purpose for Digital Selective Calling (DSC)? #18 When sending a DSC call, the vessel's _______________.