Found 17 targets:

callsign		age	comment
ECHO		19h40m	W3,NCAn/WG6D/Echo Summit
ECHO		58d 34m	MAASSLUIS (ETA Dec24 11:05)
ECHO		24d 3h20m	HANSWEERT
ECHO		14h42m
ECHO		160d 19h42m	CLASS B
ECHO		90d 6h32m
ECHO		283d 36m
ECHO		47s
ECHO		2d 21h23m
ECHO		304d 4h23m
ECHO		234d 4h7m
ECHO		236d 21h8m
ECHO		152d 5h51m
ECHO		237d 23h35m	CLASS B
ECHO		131d 20h7m	CLASS B
ECHO		192d 16h11m
ECHO		50d 15h31m

This page shows real-time information collected from the Automatic Position Reporting System Internet network (APRS-IS). APRS is used by amateur (ham) radio operators to transmit real-time position information, weather data, telemetry and messages over the radio. A vehicle equipped with a GPS receiver, a VHF transmitter or HF transceiver and a small computer device called a tracker transmits it's location, speed and course in a small data packet, which is then received by a nearby iGate receiving site which forwards the packet on the Internet. Systems connected to the Internet can send information on the APRS-IS without a radio transmitter, or collect and display information transmitted anywhere in the world.