Field Notes

The Full Chart

Ten pieces from Alsea Bay, grouped by the problem each one solves. Every entry pairs Oregon coastal craft with a machine or a piece of mathematics that learned the same lesson.

Reading Position in the Fog

Estimating where you are under uncertainty

Dead Reckoning and Deep Learning The Alsea Bay bar in fog and a modern neural network solve the same problem: estimate where you are when you cannot see.
From the Crow's Nest to the Dashboard A crow's nest and a modern dashboard serve the same ancient function: compressing a vast, noisy world into one clear view.
Einstein in the Wheelhouse Why GPS at sea depends on relativity, atomic clocks, and a refusal to ignore physics.

Signal Against Noise

Pulling the one signal out of the din

Seeing with Sound: Sonar, Echo & the Round Trip How echo ranging went from a Newport depth sounder to the submarine hunt to the radiologist's probe.
The Lens That Refuses to Waste Light How the First Order Fresnel lens at Heceta Head turns a single flame into a beam seen 21 miles out.
Fog Horns and Fourier Transforms How the Oregon coast answered the fog with frequency instead of volume.
A Page That Compresses Itself The wave field at the Alsea Bay entrance is, on the record, three numbers. The page starts as a wall of noise and resolves into the few honest terms that survive.

Data, Models, and Living Systems

Datasets, drift, and the immune analogy

The Tidal Almanac as the First Dataset A leather log on a Waldport wheelhouse shelf and the modern NOAA tide-prediction database share more than a subject. They share a schema.
Barnacles, Biofouling, and Bayesian Priors A three-year hull at the Yaquina boatyard and a model that has been drifting for six months carry the same thing: performance is what you lose first and notice last.
The Bar Crossers of Yaquina Bay and the Danger Model A skipper reads the Yaquina Bay bar for the one wave that kills, ignoring ten thousand harmless swells. Polly Matzinger's danger model says your immune system works the same way.