AIS SART Plotter
The Nasa Marine AIS SART Plotter is the first stand alone AIS receiver / plotter specifically designed for the leisure boat market.
The unit consists of a dual frequency AIS receiver, demodulator, signal processor and a backlit matrix display. It receives an NMEA input (RMC) from the boats GPS which puts the user at the centre of a radar style screen. A COG pointer is selectable by the user. All AIS carrying vessels and SART transponders are displayed with bearing and range relative to the user. Any vessel on the screen can be selected by the user. The selected vessel is highlighted and its data displayed on the right of the screen. This data includes the vessel’s MMSI number, name, course over ground, speed over ground, range, latitude and longitude.
The display, with ranges of 0.125, 0.25, 0.5, 1, 2, 4, 8, 16 and 32 nautical miles shows AIS carrying vessels and SART transponders in a format normally associated with conventional radar. A trail of previous positions clearly shows the relative track of all the targets on the screen. A box to the right of the screen displays the speed over the ground, the vessel name, mmsi number and the latidude and longitude of any target selected by the user.
As each vessel leaves a trail of previous positions the user can instantly see its relative position and bearing. Should any vessel cause concern (particularly if there is a risk of collision) it can be selected and its AIS data displayed. The MMSI number is immediately available so, in the last resort, a DSC call can be made directly to that vessel. If the user selects his own vessel then the screen repeats the users GPS position, course and speed over ground.
Each vessel’s status is shown by a different symbol so the user can see if a vessel is underway, at anchor, fishing etc.
The compact unit has a white backlit LCD display, operates from 12 volts and consumes little power.
*AIS SART Plotter is an AIS receiver only and does not transmit AIS data. It should not be confused with an AIS transponder.
Ais Engine 3
The AIS Engine 3 is supplied with a free copy of ‘SeaClear’ and a trial version of Software on Board. A data cable to connect to the 9 pin serial port of a PC and a 12 volt power cable
The AIS Engine 3 and a conventional marine antenna are all you need to start plotting vessels on your PC or AIS compatible plotter. The software runs in windows 95, 98, ME, XP, 2000, NT and Vista, it includes a world map on which vessels are plotted. Any vessel on the screen can be selected and its AIS data displayed. This includes the vessels name, MMSI number, position, call sign and destination etc. Also included on the AIS Engine is an optional input for a GPS (RMC sentence). With this connected the users own vessel is shown on the chart with its latitude and longitude displayed in a window.
The unit can receive ships on either the A or B AIS channels. In default setting it alternates between the two channels.
The AIS engine can also be used with plotters or other PC software that have an AIS input facility. Check compatibility with your software supplier. An NMEA 0183HS input at 38,400 baud is required to accept the VDM AIS strings corresponding to ITU-1371.
If your PC does not have a spare 9 pin serial port a low cost serial to USB converter is available as an optional extra.