Tag Archives :AIS

What is AIS? AIS is an important maritime navigation safety communications system intended to limit maritime accidents by automatically broadcasting and exchanging marine vessel information – including a vessel's identity, type, position, course, speed, navigational status, and other safety-related information – between and among AIS-equipped shore stations, aircraft, and other vessels.  ...

Class A AIS transponders (SOLAS Compliant) operate using Self-Organizing TDMA (SOTDMA) broadcast mode and transmit at a power level of 12.5 watts.   Dynamic information is transmitted every 2 to 10 seconds while underway and every 3 minutes while at anchor. Static and voyage related information, such as the vessel’s name and cargo, are transmitted every 6 minutes. Class A AIS transponders are required to have a DSC (156.525 MHz) receiver, external GPS, heading  ...

AIS is a tool to reduce the hazard of collision with another vessel, and from a small-boat standpoint, this basically means not placing your vessel in the path of another. Both the International Regulations for Avoiding Collision at Sea (commonly called COLREGS) and the U.S. Inland Navigation Rules spell out the maneuvers required of all vessels when avoiding collision. Correctly interpreting AIS information to accomplish this requires a working knowledge of AIS characteristics.  ...

Whichever option you choose, having AIS on your boat will without doubt make your sailing experiences safer. As well as less stressful in poor visibility or when crossing busy shipping lanes. Even a simple receiver with a small whip antenna at deck level is effective. Allowing you to keep informed of what ships are around and which ones you need to keep an eye on.  ...

Its been several years since the Automatic Identification System (AIS) became a mandated way of life for the commercial side of the marine industry. it has become one of the more valuable electronics  ...

With more and more leisure boats venturing further from their local shores, safety is paramount. Leisure boat users may be sailing in the same waters as large commercial vessels and will need to have their position and information noted to avoid any collision. This is what AIS (Automatic Identification System) does.  ...

The AIS system is using the MMSI, not the IMO number, to identify a vessel. The IMO number is part of the static AIS information provided by the vessel crew and can be transmitted additionally. So it could happen if you are searching a vessel in the vessel database by its IMO number that you find more than one entry because the vessel had different MMSI numbers in the past.  ...

Look at why you need a VHF marine radio and ask yourself “ what is best for me?” If you want to move onto venturing further out to sea, a small budget fixed radio providing the extra range may be worth considering. A large yacht sailing further offshore will need greater range so a fixed mount radio will be a better solution. And all boat and yacht should consider AIS function.  ...

Class D equipment is specifically designed for recreational vessels. It provides VHF DSC distress, urgency and safety as well as routine calling and position polling. Class D equipment includes a dedicated channel 70 DSC receiver, so you will never miss a DSC call.  ...

This system is used by shipping. It allows another vessel or coast station to use equipment that can interrogate the radio in order to learn the course, speed, type of vessel, cargo, etc. It is also available to recreational vessels.  ...