Callsign:	SENTRY
MMSI number:	338340854
IMO number:	554200
Navigational status:	Under way (engine) (0)
Vessel class:	Diving operations (34)
Destination:	CLASS B
Location:	47°39.71' N 122°22.87' W - locator CN87TP48GT - show map 7.2 km Northwest bearing 329° from Seattle, King County, Washington, United States [?] 12.4 km West bearing 292° from Medina, King County, Washington, United States 112.8 km Southeast bearing 139° from Victoria, British Columbia, Canada
Last position:	2025-06-10 22:22:26 UTC (8d 15h6m ago) 2025-06-10 15:22:26 PDT local time at Seattle, United States [?]
Course:	360° – heading 511°
Speed:	0 km/h
Dimensions:	length 14 m width 4 m draught 0.0 m
Last path:	SENTRY>ais via KB7RYY
Positions stored:	10163

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.