AWAIS-1 AIS is a widely used automatic identification system on ships, complying with the AIS Class-A standards specified by IMO, IALA and ITU. The automatic identification system integrates the capabilities of navigation information collection, RF transmission and reception, and electronic charting system. It divides the time into frames and then into slots, according to the self-organized time division multiple address technology, or simply SOTDMA technology. Each AIS station automatically selects a free slot to transmit information through a VHF transmitter. After receiving the messages, a shipborne or on shore AIS station shows the message on a display. An AIS station is also capable of transmitting safety-related messages according to the AIS standards.Thus the automatic identification system bridges the information channel between ships and between ship and shore. It helps to prevent ship collisions, improves vessel traffic safety and provides mechanisms for vessel traffic management.Our automatic identification system is mainly composed of the main unit and the MKD unit. The AIS main unit can offer functions such as VHF network listening, user data collection, own information broadcasting, vessel safety monitoring,vessel navigation information collection, user data report to PC or MKD, and responding to commands from on-shore base stations. The MKD unit of the automatic identification system ismainly designed for displaying the dynamic, static and voyage-related information of AIS network users. It can also be used for transmitting and receiving short messages, configuring the main unit and performing simple ECS functions.

VHF Specifications

Operating Band

156.025MHz to162.025MHz

Channel Bandwidth

25kHz / 12.5kHz

TX Power

12.5W / 1W

RX Sensitivity

-107dBm

Modulation

GMSK / FM

VHF Antenna Connector

BNC

Output Impedance

50Ω

Frequency Stability

≤±5ppm

Transmitter Attack/Release Time

≤1ms

Spurious Response Rejection

70dB

Internal GPS Module

Type

12 channel GPS receiver

Update Rate

1s

Positioning Accuracy

<10m

GPS Antenna Connector

TNC

Power Input Voltage

24VDC( +30% to-10%)

Power Consumption

12W(RX), 40W(TX)

Environmental Specifications

Operating Temperature

-15℃ to+55℃

Storage Temperature

-30℃ to+70℃

Vibration

IEC60945

Damp Heat

IEC60945

EMC

IEC60945

Interface Characteristics

Data Interface

RS422 (8 ports)

Baud Rate

4.8/9.6/19.2/38.4kbps configurable

Protocol

IEC61162-2, NMEA0183

Physical Characteristics

Weight <3.5kg

Size

280(mm) ×16 0(mm) ×125 (mm)