Callsign:
MMSI number:	338023196
Vessel class:	Law enforcement (55)
Location:	42°23.18' N 71°03.61' W - locator FN42LJ22SR - show map 1.4 miles West bearing 255° from Chelsea, Suffolk County, Massachusetts, United States [?] 1.9 miles North bearing 359° from Boston, Suffolk County, Massachusetts, United States 2.9 miles Southwest bearing 238° from Revere, Suffolk County, Massachusetts, United States 3.7 miles North bearing 351° from South Boston, Suffolk County, Massachusetts, United States
Last position:	2025-01-23 03:42:05 EST (12d 10h32m ago) 2025-01-23 03:42:05 EST local time at Chelsea, United States [?]
Course:	288° – heading 511°
Speed:	4 MPH
Last path:	>ais via kx1t
Positions stored:	1245

callsign		distance	last heard - EST		callsign		distance	last heard - EST
TOWLINE		0.4 miles 51°	2025-02-04 14:13:49		MASS STATE POLICE 9		0.4 miles 142°	2025-01-17 10:05:01
TUG VIRGINIA		0.4 miles 51°	2025-01-11 13:24:44		PIER PRESSURE		0.5 miles 94°	2025-01-15 14:20:49
KC1PWO-7		0.6 miles 68°	2025-02-01 20:54:21		ENCORE I		0.6 miles 116°	2025-02-03 09:32:11
GALATEA		0.6 miles 106°	2025-01-07 08:53:22		WILLIAM F. LISK		0.7 miles 120°	2025-02-04 07:59:48
ROOKIE		0.7 miles 119°	2025-02-03 13:59:06		RUTH E HUGHES		0.7 miles 119°	2025-02-04 14:13:49
EFD MARINE 1		0.9 miles 138°	2025-02-04 14:13:49		RETRIEVER		0.9 miles 138°	2025-02-04 14:13:19
MUSIC CITY QUEEN		0.9 miles 91°	2025-01-13 10:50:58		NW1S-9		0.9 miles 203°	2025-01-28 13:09:48
TUG BRAHMA		1.0 miles 132°	2025-02-04 06:46:43		SCHOODIC EXPLORER		1.0 miles 138°	2025-01-30 09:28:16
AUSTIN REINAUER		1.0 miles 115°	2025-02-04 11:01:02		JUSTICE		1.0 miles 115°	2025-02-04 14:13:49
LIBERTY		1.0 miles 116°	2025-02-04 14:13:49		USS CONSTITUTION		1.0 miles 169°	2025-02-04 14:13:19

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.