Subelement A: General Information and System Overview.— Topic :
Question 7A6
Element 7R (GMDSS-RO)What is the frequency range for Maritime VHF operations?
Explanation
Maritime VHF operations are specifically allocated to the 156-164 MHz frequency range. This falls within the Very High Frequency (VHF) band, known for its line-of-sight propagation characteristics. This makes VHF ideal for reliable, short to medium-range communication essential for maritime safety, navigation, and general ship-to-ship or ship-to-shore communications. Standardized international channels within this band ensure interoperability between vessels, port authorities, and rescue services globally.
Option A, 3-30 MHz, describes the High Frequency (HF) band, which is used for long-range maritime communication via skywave propagation, not "VHF." Option B, 88-108 MHz, is the commercial FM broadcast radio band. Option D, 540-1640 kHz, is the AM broadcast band (Medium Wave). These other bands serve different purposes with distinct propagation characteristics unrelated to Maritime VHF.
Related Questions
7A4 What is the frequency range for Ultra High Frequency?7A5 What is the frequency range for Super High Frequency?8B1 How often must a compulsory vessel's GMDSS radio station be inspected?8B2 What periodic inspection is required in order to remain in compliance with the regulations regarding8B3 Which statement is false regarding a GMDSS-equipped ship?