North is up as indicated.
Five commercial ships with their names are shown together with the home ship at the center of the circle on the 'radar screen' option.
Proximity alarms can be set to suit your security circle up to approx. 15NM radius, depending on antenna elevation.
If these ships were moving, you would see their tracks and heading.
The 'radar screen' option on your laptop is useful at sea, as there are no distinguishing land features, unlike the image below.
You can set the rings at any distance, up to as far as your VHF allows; The default is a 40 NM radius.
The setting in the picture is at 2 NM Radius and 1 NM for every
consecutive ring; You can zoom in/out.
Data sharing is possible over Bluetooth, cable etc.
An image from "Google Earth" was downloaded previously for the Mount Maunganui wharf area.
Again showing the same ships with their names (in red this time), as on the 'radar screen' above, tied up th the wharf.
Four points on this Google image were calibrated, with known points from a nautical chart iow. they were given a long and lat.
The program offsets this automatically in X and Y pixel axis thus calibrating
the image.
A similar procedure is followed for scanned charts in either jpeg or bmp
format.
Alternatively the plotting can be overlaid in a navigation program like 'MaxSea'.
This image shows AIS data, of all the ships details, like their Name, call sign, long/lat, speed, size, cargo, destination, etc.
The image shows the AIS messages transmitted by these ships
This image shows an AIS signal trace
What you get:
AIS=MC2 