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 ALTHEA - show graphs
Callsign: WDH9661
MMSI number: 367670320
Navigational status: Undefined/default (15)
Vessel class: Sailing (36)
Location: 41°40.93' N 70°40.75' W - locator FN41PQ83LQ - show map
3.3 miles West bearing 265° from Pocasset, Barnstable County, Massachusetts, United States [?]
4.0 miles Northwest bearing 309° from North Falmouth, Barnstable County, Massachusetts, United States
48.8 miles Southeast bearing 157° from South Boston, Suffolk County, Massachusetts, United States
50.6 miles Southeast bearing 157° from Boston, Suffolk County, Massachusetts, United States
Last position: 2024-09-05 11:06:49 EDT (11d 3h51m ago)
2024-09-05 11:06:49 EDT local time at Pocasset, United States [?]
Course: 231° – heading 229°
Speed: 6 MPH
Dimensions: length 12 m width 5 m draught 0.0 m
Last path: WDH9661>ais via K1XP
Positions stored: 1178
Stations near current position of ALTHEA - show more
callsign distance last heard - EDT      callsign distance last heard - EDT
HCB TENDER157.9 yards 55°2024-09-08 15:25:01 FOLIE A DEUX250.0 yards 63°2024-09-02 12:18:43
SEA AXIS255.1 yards 70°2024-08-31 18:25:17 R R322.9 yards 39°2024-09-15 11:39:42
DEEP SEA330.3 yards 55°2024-09-03 08:32:55 ANNABELLE337.7 yards 63°2024-09-13 10:44:03
SOCATEAN353.7 yards 43°2024-09-03 18:13:36 BRENDAN363.1 yards 213°2024-09-13 11:55:12
PEARL441.3 yards 5°2024-09-12 14:12:11 DAVALI455.5 yards 33°2024-08-29 08:50:21
MADISON III486.5 yards 46°2024-09-15 20:15:54 LUCY0.3 miles 40°2024-09-11 07:53:59
ONIKA0.4 miles 189°2024-09-04 12:18:19 ROBERTA C0.5 miles 40°2024-09-12 05:57:03
DETERMINATION0.5 miles 217°2024-08-31 10:42:17 GOOD ONE0.5 miles 253°2024-08-21 18:37:17
ADIRONDACK IV0.5 miles 37°2024-09-16 14:52:29 NORTHERN LIGHT0.6 miles 41°2024-09-03 09:41:09
ONE EYE DOG0.6 miles 37°2024-09-15 08:10:13 MISS JULIE0.6 miles 35°2024-09-15 11:22:40
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.
User guide · 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