Callsign:	ZTL9980
MMSI number:	378112978
Vessel class:	Pleasure (37)
Location:	37°49.21' N 122°28.84' W - locator CM87ST26HU - show map 7.4 km Northwest bearing 313° from San Francisco, San Francisco County, California, United States [?] 8.1 km Southeast bearing 143° from Tamalpais-Homestead Valley, Marin County, California, United States 11.1 km Southeast bearing 149° from Mill Valley, Marin County, California, United States 74.3 km Northwest bearing 316° from San Jose, Santa Clara County, California, United States
Last position:	2025-10-19 20:53:38 UTC (3d 12h55m ago) 2025-10-19 13:53:38 PDT local time at San Francisco, United States [?]
Course:	345° – heading 10°
Speed:	9 km/h
Last path:	ZTL9980>ais via SUNSET
Positions stored:	170

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.