AIS Position Reports
Why Do AIS Position Reports Matter?
AIS position reports matter because they provide successive data points that enable effective target tracking and situational awareness for navigators.
Read Briefing
Briefing Subtopic
AIS Position Reports
An unavailable AIS position report leaves no current location data, while a wrong one stems from faulty sensors because the system does not validate truth. USCG identifies Messages 1, 2 and 3 as Class A reports and Message 18 as the standard Class B report.
Briefings In This Subtopic
AIS Position Reports
What Are AIS Position Reports?
An AIS position report is a dynamic data transmission conveying a vessel's current location, speed, course and navigational status at a specific timestamp.
Read Briefing
AIS Position Reports
What Are AIS Position Reports Used For?
AIS position reports support target tracking, situational awareness, and CPA/TCPA calculations via dynamic data.
Read Briefing
AIS Position Reports
What Are the Main Limitations of AIS Position Reports?
AIS position reports are limited by sensor dependency, variable update rates, radar misalignment, and lack of validation.
Read Briefing
AIS Position Reports
How Are AIS Position Reports Checked or Verified?
An AIS position report carries dynamic data such as position, position accuracy, time, course, speed and navigational status. The position and timestamp originate from the target's connected electronic position-fixing receiver.
Read Briefing
AIS Position Reports
How Do AIS Position Reports Work?
An AIS position report transmits dynamic vessel data including location, speed, course and status via VHF radio. This information originates from the ship’s connected sensors and is broadcast to nearby receivers for situational awareness.
Read Briefing
AIS Position Reports
What Happens If AIS Position Reports Are Unavailable or Wrong?
An unavailable AIS position report leaves no current location data, while a wrong one stems from faulty sensors because the system does not validate truth. USCG identifies Messages 1, 2 and 3 as Class A reports and Message 18 as the standard Class B report.
Read BriefingMove From Context To Story
When you are ready to move from evidence to story, continue with the books or follow the complete series order.