Found 17 targets:

callsign		age	comment
ECHO		20h26m	W3,NCAn/WG6D/Echo Summit
ECHO		58d 1h20m	MAASSLUIS (ETA Dec24 11:05)
ECHO		24d 4h6m	HANSWEERT
ECHO		15h28m
ECHO		160d 20h28m	CLASS B
ECHO		90d 7h18m
ECHO		283d 1h22m
ECHO		46m45s
ECHO		2d 22h9m
ECHO		304d 5h9m
ECHO		234d 4h53m
ECHO		236d 21h54m
ECHO		152d 6h37m
ECHO		238d 20m	CLASS B
ECHO		131d 20h53m	CLASS B
ECHO		192d 16h57m
ECHO		50d 16h16m

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.