ATB1 Class B AIS Transceiver

Stay safe – see and be seen with Ocean Signal’s ATB1

  • Increased visibility to other vessels (SOTDMA) Increased visibility to other vessels (SOTDMA)
  • Simple to install and use Simple to install and use
  • FREE user-friendly mobile app for set up FREE user-friendly mobile app for set up
  • Superior internal 99 channel GPS receiver Superior internal 99 channel GPS receiver
  • WiFi, USB, NMEA 0183 and
NMEA 2000® connectivity WiFi, USB, NMEA 0183 and NMEA 2000® connectivity
  • Supplied with external mount GPS
antenna Supplied with external mount GPS antenna

The ATB1 needs to be configured by the user to enter the vessels MMSI number and other details.
This can be carried out by a mobile App or a web based program:

  • For the Mobile Android version search the Playstore for Ocean Signal
  • For the Mobile iOS vesion – this version is coming soon
  • For the Web version click here: AIS Config

 

The Ocean Signal ATB1 Class B AIS Transceiver incorporating the superior SOTDMA access scheme provides increased visibility and safety at sea.

The fully compliant ATB1 Class B SOTDMA AIS Transceiver from Ocean Signal is the latest in a long line of essential sea-safety equipment developed and manufactured in the UK for the Maritime market.

Designed as an aid to collision-avoidance, it provides a significant advantage in navigational safety giving you the peace of mind that your vessel will be seen day or night, no matter the weather, on today’s busy waterways.

Your vessel information such as position, speed, course and heading is ascertained automatically and continuously using the impressive internal multi-GPS receiver for accurate global positioning. Boasting 99 acquisition channels and 33 tracking channels, this advanced technology ensures that the AIS transmissions provide the most accurate indication of your vessel’s position at all times.

Other vessel information such as vessel name, call sign, type and dimensions as well as the MMSI are also transmitted automatically from the ATB1. This information is uploaded to the ATB1 via WiFi directly from Ocean Signal’s user-friendly mobile app or website. Once this information has been uploaded, it remains stored in the unit’s nonvolatile memory even if powered down for long periods of time.

The ATB1 also receives and interprets AIS messages from other AIS equipped vessels within range, which can then be relayed effortlessly to other navigation devices such as chart plotters, laptops or mobiles using the ATB1’s NMEA 0183, NMEA 2000®, USB or WiFi outputs.

Using the superior SOTDMA* access scheme sets the ATB1 apart from the CSTDMA** class B products available. This Ocean Signal Class B unit has the same AIS transmission priority as a class A unit, giving the added assurance that there will be no loss or delay of transmission, even in high traffic areas.

The ATB1 also has a faster reporting rate and higher output power than CSTDMA class B units.  It sends AIS transmissions every 5 seconds instead of the maximum two transmissions per minute and the 5W output power instead of 2W allows your transmissions to reach further.

A multi-colour LED indicator light on the ATB1 signals the on-going operational status of the unit. This additional safety feature provides you the confidence of knowing that the ATB1 has continuous AIS transmission and optimal performance. The ATB1 has a sleek yet rugged waterproof design that is high on performance and low on energy consumption. 

It is quick and simple to install and comes complete with an external GPS antenna, meaning that all you need is the use of a suitable device (mobile phone, tablet or PC) to upload your vessel information, and you can begin transmitting your AIS messages within minutes.

A leader in life-saving maritime products for the professional and leisure markets, Ocean Signal yet again provides the ultimate in safety and peace of mind with the ATB1 Class B Transceiver.

The following statement is for US customers only:  This device has not been authorized as required by the rules of the Federal Communications Commission. This device is not, and may not be, offered for sale or lease, or sold or leased, until authorization is obtained.

* Self Organised Time Division Multiple Access
** Carrier Sense Time Division Multiple Access

 

 

 


Frequently Asked Questions

What information is transmitted?

Position reports (MMSI, Lat, Long, COG, SOG)  for Class B (SOTDMA)

  • Every 3mins. when SOG < 2 knots
  • Every 30s when SOG >= 2 knots < 14 knots
  • Every 15s when SOG >= 14 knots < 23 knots
  • Every 5s when SOG > 23 knots

Vessel data (Name, call sign, dimensions, type etc.)

  • Every 6mins.

This means that if you are moored or in the marina your data may take some while to be visible on other peoples systems.

Depending on your location visibility on Marine Traffic or Shipfinder websites may take much longer.

Can I use an existing GPS receiver or GPS data instead of installing an additional GPS antenna for the AIS?

No. The use of the internal GPS receiver is a requirement of the AIS regulations.

The AIS can be used as a position source output by configuring it to output GPS position data (RMC NMEA sentence) although this is not generally recommended.

Can I change the MMSI or vessel details?

Always take great care when entering the MMSI number.
Once programmed changing the MMSI number will require the AIS to be ‘unlocked’ by contacting Ocean Signal via the set-up app. This could take up to 2 days.

Changing all other details entered is simple using the Mobile or Web based set-up app’s.

How do I connect my ATB1 to my existing navigation electronics?

The ATB1 comes with both NMEA0183 and NMEA2000 communication protocols.

To connect using NMEA0183 you will require some suitable connector block and the wiring information for your other manufacturer’s equipment.

To connect using NMEA2000 you will require a spur (drop) cable suitable to connect to the DeviceNet (male) connector on the AIS to an existing NMEA2000 backbone. An unused connection on the backbone must be available.

What type of radio antenna should I use ?

The ATB1 transmits and receives on the VHF band so any good quality Broad Band Marine VHF antenna will be suitable.

There are AIS Tuned antennas available which are suitable but other narrow band or tuned antennas should be avoided. If a single antenna is to be used by VHF radio and an ATB1 then an active antenna splitter should be installed.

What is the range of AIS?

This varies enormously depending on weather, VHF antenna height etc.

  • Typical transmit range for Class B is 10nm
  • Typical receive range for Class A targets is 20nm
  • Receive range can exceed 100nm in the right conditions

How do I configure my ATB1?

The ATB1 needs to be configured by the user to enter the vessels MMSI number and other vessel details.
This can be carried out by a mobile App or a web based program:

  • For the Mobile Android version search the Playstore for Ocean Signal
  • For the Mobile iOS vesion – this version is coming soon
  • For the Web version click here: AIS Config

Specifications

Transmitter

Transmit Power
5/1 Watts
Frequency Range
156.025 – 162.025 MHz
AIS Modulation
GMSK: BT 0.4

Receiver

Sensitivity
-107 dBm for 20% packet error rate
Frequency Range AIS RX1 & RX2
156.025 – 162.025 MHz
Frequency DSC
156.525MHz

General

Temperature Range
-15°C to +55°C / 5°F to 131°F
Waterproof
IPx7 (1 metre for 30 minutes)
Supply Voltage Range
10.8 V to 31.2 V

GPS Receiver

High Sensitivity
Channels
99 acquisition / 33 tracking

Interfaces

Serial ports
IEC61162-1, -2 (NMEA 0183); 2 Rx/Tx / NMEA2000® / USB / WiFi IEC802.11 bgn

Compliance

IEC62287-2, IEC60945