(31838 products available)
Ready to Ship
Ais class refers to the different categories of vessels based on their construction, equipment, and operational capabilities. The different forms of Ais class are as follows.
A1 Class
This is for ships that are always navigating in the areas where they can communicate with their A1 class stations at all times. This is the minimum level of Ais class ship safety that is required. It is usually used by coastal vessels and ships that are operating within their home waters.
A2 Class
A2 class vessels are those that operate in areas where they cannot always communicate with their class A ais stations. They must have Ais Class equipment that allows them to communicate when they are away from their home port.
A3 Class
A3 class ships are those that operate in areas that are not always accessible, where they cannot always communicate with their class A ais stations, and cannot always navigate.
A4 Class
For A4 class vessels, their operating area is the open sea, which is far from the coast. These ships must have Ais class equipment that allows them to communicate in areas where they cannot always navigate and communicate.
1. Transmission Power
Low (Class B): 1 Watt (1 W) transmission power.
Standard (Class A, B, and A/B): 12.5 Watt (12.5 W) transmission power.
2. Range
Long Range (Class B): 20-30 nautical miles (nm) or more, depending on the environment and conditions.
Standard (Class A, B, and A/B): 40-50 nm range depending on the environment and conditions.
3. Frequency
All classes operate on VHF frequencies at 161.975 MHz.
4. Channel
All classes use Channel 88 for AIS communication.
5. Power Supply
AIS Class A and Class B devices must be powered by a 12 or 24-volt electrical system.
6. Data Transmission
AIS Class A and Class B constantly transmit and receive data, including vessel position, speed, course, and heading, using GPS or GLONASS.
7. Integration
AIS Class A devices must be integrated with the vessel's navigation system (e.g., radar, chart plotter).
8. Display
AIS Class B devices must have a display showing AIS information (e.g., nearby vessels, alarms).
9. Alarms
AIS Class A devices must have configurable alarms for collision risk and other critical events.
10. Certification
AIS Class A devices must be type-approved and certified according to international standards (e.g., ITU-R M.1371).
11. Antenna
All classes of AIS devices require a VHF antenna for communication.
12. The messaging service
All classes use the AIS messaging service for various communications.
1. Regular Inspection
Inspect the AIS device, antenna, cable, and connectors for damage or wear regularly.
2. Cleaning
Keep the AIS device and antenna clean using a soft cloth and mild detergent. Avoid using abrasive materials that could damage the device or antenna.
3. Firmware Updates
Check for firmware updates from the manufacturer of the AIS device regularly. Install any available updates to ensure the device operates optimally.
4. Power Supply
Ensure the AIS device is connected to a stable power supply. Monitor the voltage level and battery condition if the device uses a battery backup.
5. Data Integrity
Monitor the data displayed on the AIS device to ensure it is accurate and complete. Check the GPS signal and vessel position regularly. If there are any problems with the GPS signal or vessel position, troubleshoot the issue immediately.
6. Integration
If the AIS device is integrated with other navigation equipment, ensure the integration works correctly. Test the communication between devices regularly and troubleshoot any problems.
7. Environmental Considerations
Consider the environmental conditions where the AIS device is installed. High temperatures, humidity, or exposure to saltwater can affect the device's performance. Take appropriate measures to protect the device from environmental factors.
8. Professional Maintenance
If users are unsure how to maintain or troubleshoot an AIS device, consult a professional technician or service center for assistance.
Choosing the right AIS class for a vessel involves considering various factors such as the type of vessel, its operating area, and the level of safety and navigation assistance required. Here are some key points to consider when selecting an AIS class:
Type of vessel:
The type of vessel is an important aspect when deciding on an AIS class. For instance, larger commercial vessels such as cargo ships and oil tankers may be required by regulations to have Class A AIS installed. In contrast, smaller recreational boats may only be required to have Class B AIS or, depending on the local regulations and safety standards.
Operating area:
The operating area is also a key factor to consider when selecting an AIS class. Vessels operating in busy traffic areas such as major ports and shipping lanes require a higher level of situational awareness and must be equipped with Class A AIS. This is because Class A AIS provides long-range tracking, automatic transmission of vessel data, and is suitable for vessels operating in congested waters where monitoring the traffic is crucial for safety.
Safety requirements:
Different vessels have different safety requirements based on their size, type, and the area they operate in. Larger vessels and those transporting dangerous goods have stricter safety regulations and are required to have Class A AIS. In contrast, smaller recreational boats may have less stringent safety regulations and can use Class B AIS, which is relatively affordable.
Integration with other systems:
AIS devices can be integrated with other onboard systems such as radar, chart plotters, and electronic navigation systems to enhance situational awareness and provide more information. Class A AIS is compatible with advanced integration and offers seamless data exchange, which is important for larger commercial vessels. On the other hand, Class B AIS may have limited integration capabilities.
Budget and cost considerations:
Class A AIS devices are more expensive than Class B due to their advanced features and capabilities. Therefore, cost considerations play a significant role in selecting an AIS class. Vessel owners must evaluate their budget and the required features and find a balance that meets their needs.
In summary, selecting the right AIS class involves considering the vessel type, operational area, safety requirements, integration capabilities, and budget. It is also advisable to consult relevant authorities, conduct a needs assessment, and evaluate different options before making a decision.
There are several steps involved in replacing AIS class 1 and class 2, and they include:
Selecting the right equipment
To replace an Ais class on a vessel, the appropriate equipment must be selected. This includes Ais transponder, antennas, cables, and installation hardware. The Ais transponder should meet the specifications and requirements for the desired class.
Preparing for installation
Before installation, planning and preparing for the installation location on the vessels should be done. The installation location must provide a suitable environment for proper operation. Also, the equipment should be inspected to ensure they are in good condition and prepared for installation.
Mounting the transponder
The Ais transponder should be mounted securely at the location selected. The mounting should be done following the manufacturer's instructions, and it should be mounted in a way that it does not interfere with other systems on the vessels.
Connecting antennas
The Ais transponder must be connected to the antennas. The antennas should be installed at a suitable location, and they should be mounted according to the manufacturer's instructions. Proper connections should be made between the transponder and the antennas to ensure efficient communication.
Connecting installation hardware
The Ais transponder should be connected to the installation hardware, including cables, power supply, and data connections. The connections should be made following the manufacturer's instructions to ensure reliable operation and communication.
System configuration
Once the Ais transponder is installed and connected, the system should be configured according to the manufacturer's instructions and the vessels' requirements. This includes setting the communication parameters, identifying the vessel settings, and other relevant settings.
System verification
After the system is configured, it should be verified to ensure proper operation and communication. This includes checking the Ais transponder's operation, verifying the communication with other vessels and shore stations, and ensuring the system's functionality.
Training and familiarization
Once the Ais class is replaced, training and familiarization should be provided to the crew. This ensures that the crew is aware of the new system, its operation, and the relevant procedures.
Q1: What is the meaning of AIS in ship?
A1: In ships, AIS means Automatic Identification System. It is used for tracking vessels and increasing the safety of navigation by providing information about the traffic in the surrounding waters.
Q2: What does Class 1 mean in AIS?
A2. Class 1 in AIS means that it is an international ship-to-ship and ship-to-shore navigation safety communication system. It is mandatory for larger vessels and provides various functionalities that enhance maritime safety and security.
Q3: Does A-class require a license?
A3. Yes, one might need a license to operate AIS class A, depending on the country's regulations where one is operating. However, in most cases, no special license is required to use AIS class B, as it is designed for recreational or smaller commercial vessels.
Q4: Can users upgrade from Class B to Class A?
A4: Yes, it is possible to upgrade from Class B to Class A. However, this may require new equipment installation since Class A devices are more advanced and have additional features compared to Class B.
Q5: Does AIS class A require installation by a professional?
A5: Yes, AIS class A is complicated and requires installation by a professional. This ensures proper functionality and integration with other navigation systems on board the vessel.
浙公网安备 33010002000092号
浙B2-20120091-4