AIS transmits information over which frequency band?

AIS transmits information over which frequency band?

• A. VHF
• B. HF
• C. UHF
• D. Shoreline

Answer: (A)

The correct answer is that AIS (Automatic Identification System) transmits information over the VHF (Very High Frequency) frequency band. AIS operates primarily on VHF channel 87B, which is specifically allocated for maritime communication. The choice of VHF allows AIS to effectively transmit real-time data, such as vessel location, course, speed, and identification details, over relatively short distances, typically up to 20 nautical miles, which is suitable for maritime traffic management. Using VHF frequencies benefits AIS by enabling line-of-sight communication, which is essential in the marine environment where vessels may be in close proximity to one another. This capability enhances situational awareness among vessels and shore stations, contributing to safety and navigation efficiency.

The correct answer is that AIS (Automatic Identification System) transmits information over the VHF (Very High Frequency) frequency band. AIS operates primarily on VHF channel 87B, which is specifically allocated for maritime communication. The choice of VHF allows AIS to effectively transmit real-time data, such as vessel location, course, speed, and identification details, over relatively short distances, typically up to 20 nautical miles, which is suitable for maritime traffic management.

Using VHF frequencies benefits AIS by enabling line-of-sight communication, which is essential in the marine environment where vessels may be in close proximity to one another. This capability enhances situational awareness among vessels and shore stations, contributing to safety and navigation efficiency.