CHAI SA01 Shipborne Class A Automatic Identification System

CHAI SA01 Shipborne Class A Automatic Identification System

1. Product Number: CHAISA01 Shipborne Class A Automatic Identification System

2. Introduction:

The CHAISA01 vessel-mounted Class A Automatic Identification System is equipped with AIS automatic identification and GPS positioning functions, enabling features such as collision avoidance between vessels, information exchange, vessel positioning, and distance-based alerts. The application of new technologies has made various alert functions—such as encounter warnings, arrival notifications, and course deviation alerts—more accurate, truly playing a role in enhancing navigational safety.

3. Function:

3.1 Automatic Identification System (AIS) Functions for Ships

Transmission, reception, and display of autonomous ship’s dynamic, static, and navigation data;

Static data includes: MMSI, ship name, call sign, IMO number, vessel type, vessel size, GPS antenna location, and port of registry, etc.;

Dynamic data includes: latitude and longitude, ship speed, course, turning rate, navigation status, and time, among others.

Navigation data includes: draft depth, types of dangerous goods, port of destination, and estimated time of arrival, among others;

Information sending, receiving, and display (including Chinese information).

3.2 Target Ship Proximity Alarm Function

Proximity setting;

Near the LED flash indicator;

Proximity voice broadcast prompt (adjustable from 0.1 to 6.0 nautical miles);

Proximity alarm sound prompt (adjustable from 0.1 to 6.0 nautical miles).

3.3 Target Ship Information Display Function

The list displays the target vessel (showing distance, bearing, and a 9-digit identification code);

The vector graphic displays the target vessel (with range options from 0.1 to 48 nautical miles);

Zoom in to display the target vessel’s data information;

Display detailed data information about the target vessel.

3.4 GPS Navigation Function

Display of ship position, ship speed, course, time, and date;

Waypoint storage and retrieval;

Display of the destination’s direction, distance, and estimated time of arrival;

Yaw alarm and prompt upon reaching the destination during navigation;

4 Product Composition:

The CHAISA01 vessel-mounted Class A Automatic Identification System consists of a main unit, a GPS antenna, and a VHF antenna.

5. Interface:

COM 1 – 2 * IEC 61162-1/61162-2

Input: VSD, SSD, ABM, BBM, ACA, ACK, AIR, DTM, GBS, GGA,

GLL, GNS, HDT, LRF, LRI, OSD, RMC, ROT, VBW, VTG

Output: VDM, VDO, ABK, ACA, ALR

6. Performance indicators:

6.1 Comprehensive Indicator:

RF unit: 1 transmitter, 3 receivers

Working power supply: AC 220V, DC 13.8V (±15%)

Frequency range: 156.025–162.025 MHz

Communication mode: CSTDMA

Operating frequency: CH87 161.975 MHz

CH88 162.025 MHz

CH70 156.525 MHz

Operating temperature: -15℃ to +55℃

6.2 AIS Transmission Section

Carrier power: 12.5W / 2.5W

Modulation spectrum: -25 dBW

　　　　　-60 dBW

Modulation accuracy: <3400 Hz (bits 0, 1)

　　　　　2400 Hz ± 480 Hz (bits 2 and 3)

　　　　　2400 Hz ± 240 Hz (bit 4–199 or 00001111 bit format)

　　　　　1740 Hz ± 175 Hz (for the 0101 bit pattern)

Power vs. Time: Transmission Delay: 2083 µs (normal transmission for one time period)

Increase time: ≤313 µs

Reduction in time: ≤313 µs

Launch duration: ≤323,333 μs

Spurious Emissions: -36 dBm (9 kHz – 1 GHz)

　　　　　-30 dBm (1 GHz – 4 GHz)

6.3 AIS Receiving Section

Reference sensitivity: -107 dBm (packet error rate ≤ 20%)

High input error: -77 dBm (packet error rate ≤ 2%)

Co-frequency interference: 10 dB (packet error rate ≤ 20%)

Adjacent-channel selectivity: 70 dB (bit error rate ≤ 20%)

Spurious response interference: 70 dB (bit error rate ≤ 20%)

Intermodulation response interference: 65 dB (bit error rate ≤ 20%)

7. Application areas

The SERIAIS-A01 shipborne Class A Automatic Identification System can be widely used on various types of vessels, including oceanographic research ships, marine survey vessels, offshore engineering vessels, cargo ships, and distant-water fishing vessels.

Structural diagram