Technical questions

  • What is the range AIS covers?
  • How is the data collected?
  • Will AIS replace radar?
  • How does AIS supplement radar information?
  • What are the main limitations of AIS?
  • How does the master know that the information received from another AIS unit is accurate?
  • Why do AIS messages not include the rudder angle?
  • How is AIS information displayed?
  • What is the accuracy of navigational information provided?
  • How will AIS contribute to the prevention of collisions?
  • Is there a limit on the length of AIS messages?
  • Should AIS data be integrated on the same display as information from other sensors in a VTS?
  • Are AIS messages limited to safety information?
  • Under what circumstances can the AIS unit be switched off?
  • Will AIS messaging grow to include commercial usage?
  • Is it possible to transmit fraudulent messages?
  • Can I get DGNSS corrections over the AIS link?
  • How is meteorological/hydrological information displayed?
  • Why am I unable to see an AIS vessels' name or other static information (dimensions, call sign, etc.)?
  • Why do I sometimes see more than one vessel with the same MMSI or vessel name (i.e. NAUT)?
  • What kind of information is broadcast for each ship and how often is it updated?
  • Which VHF channels or frequencies are used with AIS?
  • Can I use my AIS in an emergency or for distress messaging?

Installation questions

  • Can I connect my GNSS to the AIS?
  • Can I connect my gyro compass to the AIS?
  • What are the basic steps to install an AIS receiver?
  • Can I use an existing marine VHF antenna?
  • How does the master know that his AIS unit is working properly?
  • Is there any calibration of the AIS equipment needed?
  • Is there any set up (initial/regular/frequent) of the AIS equipment needed?
  • Is there any training on the use of AIS available?
  • Are naval ships required to fit AIS?
  • Does the installation of the AIS require additional equipment in order for the AIS to operate properly?
  • What is a MMSI and where can I get one for my AIS?
  • I have hooked up my AIS receiver. Why don’t I see ships immediately?
  • The ships show up as numbers? I thought I would also see the name of the ship.
  • I just purchased and installed an AIS Class B, will AIS Class A users ‘see’ me?
  • I don’t have a spare serial port on my computer. How do I connect an AIS receiver to my computer?
  • Who should have AIS fitted

Product related questions

  • Where can I get AIS data?
  • Will an AIS receiver work with manufacturers proprietry data systems?
  • Single channel switching receiver and full time dual channel receivers. What are the differences between these models?
  • How much does an AIS cost?
  • What is the difference between Class A and Class B AIS equipment?
  • Class B units, which vessels can they be used on?
  • What type of VHF antenna do I need for an AIS receiver?

Testing and certification

  • What methods are available to prevent inappropriate use of AIS?
  • When is a vessel permitted to sail without operational AIS equipment?
  • Is AIS mandatory for inland waterways?

All About AIS

  • Who is All About AIS?
  • Do you promote one AIS brand over another?