Callsign:	SENTRY
MMSI number:	338340854
IMO number:	554200
Navigational status:	Under way (engine) (0)
Vessel class:	Diving operations (34)
Destination:	CLASS B
Location:	47°21.07' N 122°24.41' W - locator CN87TI14EH - show map 4.8 miles Northwest bearing 294° from Federal Way, King County, Washington, United States [?] 6.2 miles West bearing 281° from Lakeland North, King County, Washington, United States 7.0 miles North bearing 14° from Tacoma, Pierce County, Washington, United States 17.9 miles South bearing 191° from Seattle, King County, Washington, United States
Last position:	2024-04-05 13:12:21 EDT (42d 9h34m ago) 2024-04-05 10:12:21 PDT local time at Federal Way, United States [?]
Course:	237° – heading 511°
Speed:	17 MPH
Dimensions:	length 14 m width 4 m draught 0.0 m
Last path:	SENTRY>ais via KB7RYY
Positions stored:	10124

callsign		distance	last heard - EDT		callsign		distance	last heard - EDT
ESCAPADE		226.4 yards 36°	2024-05-13 17:59:54		AVE MARINA		414.5 yards 248°	2024-05-14 18:47:08
PACIFIC TIME		0.5 miles 46°	2024-05-11 13:59:29		STARGAZER		1.0 miles 40°	2024-04-20 15:39:55
RHAPSODY		1.2 miles 90°	2024-05-11 19:00:57		MYSTIFIED		1.7 miles 214°	2024-05-04 20:54:41
KNOT ON DUTY		1.9 miles 211°	2024-04-29 14:23:08		W7W/KG143		2.0 miles 350°	2024-05-15 14:48:05
KAH SHAKES		2.2 miles 214°	2024-05-12 16:06:49		SALISH SWAN		2.5 miles 39°	2024-05-17 12:45:25
NK9W-4		2.6 miles 123°	2024-05-17 21:45:20		EW1647		2.7 miles 113°	2024-05-17 22:45:55
DRAGON		2.9 miles 40°	2024-05-07 17:16:49		URSA MAJOR		2.9 miles 316°	2024-05-13 16:50:46
cw6677		2.9 miles 201°	2024-05-17 22:45:06		MARCY		2.9 miles 211°	2024-05-03 22:53:45
BOREALIS		3.0 miles 318°	2024-05-16 21:13:16		KOKOPELLI		3.0 miles 319°	2024-05-12 15:53:21
BULLDOG		3.0 miles 33°	2024-05-15 18:45:38		TRI TO BE NICE		3.1 miles 324°	2024-05-12 11:44:46

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.