Station info - map view · info · telemetry · weather · raw · status · beacons · messages · bulletins · browse · moving · my account
Callsign, ship name or locator: Clear       
It is possible to search using wildcards (*?) after a prefix. Example: OH*
AIS vessel GERTIE - show graphs
Map loading...
Callsign: WDF9944
MMSI number: 367510470
Navigational status: Undefined/default (15)
Vessel class: Sailing (36)
Location: 39°27.17' N 75°59.02' W - locator FM29AK18XQ - show map - static map
8.4 miles South bearing 183° from Charlestown, Cecil County, Maryland, United States [?]
10.4 miles South bearing 193° from North East, Cecil County, Maryland, United States
35.4 miles East bearing 71° from Baltimore, City of Baltimore, Maryland, United States
55.5 miles Southwest bearing 232° from Philadelphia, Philadelphia County, Pennsylvania, United States
Last position: 2017-07-24 14:08:58 EDT (85d 13h3m ago)
2017-07-24 14:08:58 EDT local time at Charlestown, United States [?]
Course: 43°
Speed: 6 MPH
Dimensions: length 12 m width 3 m draught 0.0 m
Last path: WDF9944>ais via K3ARS
Positions stored: 149
Stations near current position of GERTIE - show more
callsign distance last heard - EDT      callsign distance last heard - EDT
K3CF-15.5 miles 52°2017-10-18 03:12:24 EW87875.8 miles 129°2017-10-18 03:05:09
EW50497.3 miles 145°2017-10-18 03:08:52 N3DOU-17.7 miles 212°2017-10-18 03:12:34
N3DOU-97.7 miles 212°2017-10-17 16:28:38 W3VD8.1 miles 31°2017-10-09 16:45:18
W3BW-58.1 miles 137°2017-10-18 02:39:47 N3XJT-18.2 miles 4°2017-10-18 03:06:41
W3FJD-88.4 miles 6°2017-10-18 02:45:09 N3ZLL-78.7 miles 33°2017-10-17 18:10:54
N3OBQ-98.8 miles 325°2017-09-18 18:41:13 N3OBQ-58.9 miles 325°2017-09-30 12:42:44
N3OBP-99.3 miles 324°2017-10-17 17:30:09 147.375-K13.0 miles 205°2017-10-18 03:07:24
N3JFS-113.9 miles 59°2017-10-13 23:35:36 EW364314.7 miles 21°2017-10-18 03:12:47
KARS-NET-15.7 miles 181°2017-10-17 20:52:40 KARS-NET_15.7 miles 181°2017-10-17 19:58:23
DW311815.8 miles 340°2017-10-18 03:02:24 KB3LJB-915.9 miles 342°2017-10-17 22:02:23
About this site
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.
FAQ · Blog · Discussion group · Linking to aprs.fi · AIS sites · Service status · Database statistics · Advertising on aprs.fi · Technical details · API · Change log · Planned changes · Credits and thanks · Terms Of Service · iPhone/iPad APRS