Callsign:	SENTRY
MMSI number:	338340854
IMO number:	554200
Navigational status:	Undefined/default (15)
Vessel class:	(0)
Destination:	CLASS B
Location:	47°09.67' N 122°52.44' W - locator CN87ND58CP - show map 8.8 miles Northwest bearing 330° from Tanglewilde-Thompson Place, Thurston County, Washington, United States [?] 9.1 miles North bearing 345° from Lacey, Thurston County, Washington, United States 21.1 miles West bearing 253° from Tacoma, Pierce County, Washington, United States 39.8 miles Southwest bearing 220° from Seattle, King County, Washington, United States
Last position:	2025-01-14 12:11:26 EST (14d 23h27m ago) 2025-01-14 09:11:26 PST local time at Tanglewilde-Thompson Place, United States [?]
Course:	50° – heading 511°
Speed:	31 MPH
Dimensions:	length 14 m width 4 m draught 0.0 m
Last path:	SENTRY>ais via Teachgeek
Positions stored:	10126

callsign		distance	last heard - EST		callsign		distance	last heard - EST
231346		0.6 miles 21°	2025-01-29 11:30:02		FW9464		1.7 miles 9°	2025-01-29 11:35:16
RV SKOOKUM		3.2 miles 298°	2025-01-09 17:32:05		K7HTZ-10		4.1 miles 109°	2025-01-29 11:03:24
K7HTZ-11		4.1 miles 109°	2025-01-29 11:03:25		EW4160		4.8 miles 304°	2025-01-29 11:30:33
KK7NYX-Y		5.1 miles 166°	2025-01-29 11:27:10		KK7NYX-D		5.1 miles 166°	2025-01-29 11:26:20
FW9097		5.4 miles 181°	2025-01-29 11:30:43		DW0249		5.8 miles 125°	2025-01-29 11:35:17
KB8BMY-7		6.3 miles 135°	2025-01-25 21:14:21		KB8BMY-5		6.3 miles 135°	2025-01-18 13:17:27
KK7WBL-9		6.5 miles 29°	2025-01-02 01:17:35		Teachgeek		6.8 miles 299°	2025-01-29 11:39:04
W7PLC-9		6.9 miles 197°	2025-01-14 15:31:39		CW2973		7.2 miles 173°	2025-01-28 23:33:30
KK7YKB-5		7.5 miles 121°	2025-01-25 19:45:43		KB8BMY-10		7.6 miles 138°	2025-01-29 11:38:16
FW5771		7.9 miles 264°	2025-01-29 11:30:32		W7AJR-9		8.0 miles 151°	2025-01-14 19:26:53

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.