How often does a shipboard AIS unit transmit a vessel's dynamic data?

How often does a shipboard AIS unit transmit a vessel's dynamic data?

• A. Every 30 seconds
• B. Varies based on speed and course alteration
• C. Every 2 minutes
• D. Every 10 minutes

Answer: (B)

A shipboard AIS (Automatic Identification System) unit transmits a vessel's dynamic data at variable intervals, which depend on the vessel's speed and course changes. This means that the frequency of transmission increases when the vessel is moving at higher speeds or when significant changes in direction occur. Specifically, if the vessel is moving at more than 23 knots, the AIS unit is designed to transmit data every 2 seconds. If the vessel is moving slower or is stationary, the interval can extend up to 3 minutes. This variability in transmission frequency is crucial for ensuring that other vessels and shore stations receive timely and relevant information, enabling better navigation safety and situational awareness. The other options suggest a fixed interval, which does not reflect the dynamic and adaptive nature of AIS transmissions based on the vessel's operational status.

A shipboard AIS (Automatic Identification System) unit transmits a vessel's dynamic data at variable intervals, which depend on the vessel's speed and course changes. This means that the frequency of transmission increases when the vessel is moving at higher speeds or when significant changes in direction occur. Specifically, if the vessel is moving at more than 23 knots, the AIS unit is designed to transmit data every 2 seconds. If the vessel is moving slower or is stationary, the interval can extend up to 3 minutes. This variability in transmission frequency is crucial for ensuring that other vessels and shore stations receive timely and relevant information, enabling better navigation safety and situational awareness.

The other options suggest a fixed interval, which does not reflect the dynamic and adaptive nature of AIS transmissions based on the vessel's operational status.