GPS Navigation Guide: Practice with Maps, Coordinates, and Waypoints — companion record
Updated October 2, 2026
Article: https://yenra.com/gps-navigation-guide/

HOW TO USE
Start with the desk exercise, then use a familiar public route and the exact device instructions. Carry a physical map and suitable power; check local conditions and share your plan. The invented coordinates below are a format exercise, not a destination to visit.

RECORD
1. Map title/date/scale; legend; horizontal datum; coordinate format; grid zone if applicable
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2. Device/app/version; map download/region; units; coordinate settings
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3. Desk exercise: 40.5000 N, 75.2500 W, WGS84. Convert to degrees and decimal minutes.
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4. Answer: 40 degrees 30.000 minutes N, 75 degrees 15.000 minutes W. Signed decimal latitude/longitude: 40.5000, -75.2500. Datum unchanged.
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5. Known start and two landmarks; intended established paths
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6. Practice start time (include time zone); position/uncertainty as displayed
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7. Waypoint name/coordinate/reference; saved value read back
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8. Track start/stop controls; recording saved and reopened
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9. At each landmark: observed features / map agreement / next path / reason
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10. Track gaps or jumps; one issue to investigate; repeat-practice outcome
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SOURCE CONTEXT
This original Yenra worksheet accompanies the linked guide. Historical documents establish dated capabilities; confirm exact model, version and current service applicability. Sources:
https://www.nps.gov/articles/10essentials.htm
https://www.usgs.gov/faqs/why-are-usgs-historical-topographic-maps-referenced-outdated-datums