Navigation & Timekeeping · Recorded milestone
Transit satellite navigation
Recorded year1964
The US Navy's Transit satellites let submarines and ships fix their position from radio Doppler shifts, the first satnav system.
Explore this milestone on the interactive mapBuilt on
- TransistorRecorded · 1947enables
- First satelliteRecorded · 1957enables
Led to
- GPSRecorded · 1995enables
Sources & evidence
Dataset updated 2026-10-18. This individual record has not been separately re-reviewed.