For First Responders · Dead Reckoning
Dead Reckoning for a service area
Built for first responders planning or training for real incidents. Run fast what-if scenarios for response planning and training — no software to install in the field. Simulate a service area live below — adjust the inputs and watch it respond, right in your browser.
Dead ReckoningLive
navigating with drift
Controls
Presets
Before GPS, navigators tracked position by dead reckoning: from a known start, add up each leg's heading and speed over time. But wind and current push you off your intended track, so the actual path drifts. The gap between where you meant to go and where you ended up is why sailors and pilots learn to correct for set and drift.
Data Inspector
Distance made good32.6 nm
Drift12.0 nm
Effective speed8.2 kn
Governing equation
Reading this result: Over 4 h the current carries you 12.0 nm off the intended track; steering a correction angle up-current would cancel most of this set.
Runs locally in your browser — free forever. Scale to the cloud when reality gets heavy.
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Frequently asked questions
- Is this good for first responders?
- Yes — this version of "Dead Reckoning for a service area" is framed for first responders planning or training for real incidents. Run fast what-if scenarios for response planning and training — no software to install in the field.
- Do I need to install anything?
- No. It runs in any modern browser, free, with no account required.