User's Manual

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1.3 Type of AIS
There are different types of AIS device as described below. The CYPHO-150X is an AIS receiver.
Table 1-2 Type of AIS
Class A AIS
Transponder
‧ Transmits and receives AIS signal.
‧ Intended for vessels meeting the requirements of IMO AIS carriage
requirement.
‧ It is mandatory for all commercial vessels that exceed 300 tons to be
equipped with Class A AIS.
Class B AIS
Transponder
‧ Transmits and receives AIS signal.
‧ Not necessarily in full accord with IMO AIS carriage requirements.
‧ It is not mandatory for vessels to be equipped with Class B AIS.
‧ Suitable for recreational vessel, in enhancing its safety at sea.
AIS
Receiver
‧ Only receives AIS signal.
‧ Does not have transmitter to send out AIS signal.
‧ Suitable for recreational vessel that does not want to send out its vessel
information.
1.4 AIS Message Type
The CYPHO-150X can receive AIS messages from both class A and class B AIS transponders.
The message types are listed as below table. The messages in gray color are transmitted only
from class A AIS device.