After her arrival in Hilo, the log became part of the documentary record of the voyage. It was eventually one of the sources she drew on when writing the memoir, providing dates, positions, and specific observations that memory alone would not have retained with the same precision.
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## The Ocean as Environment
The Pacific Ocean that Tami Oldham Ashcraft navigated alone for 41 days is the largest geographic feature on Earth. At its greatest width — from the coasts of Asia and Australia to the Americas — it stretches more than 12,000 miles. It covers more area than all of Earth’s landmasses combined. It contains the greatest depths on the planet’s surface, the most extreme weather phenomena, and a diversity of marine life that remains incompletely documented.
For a person alone on a small boat in the middle of it, these dimensions translate not into grandeur but into isolation. The circle of visible ocean from a deck-level vantage point is approximately three to five miles in diameter, depending on the observer’s height above the water. Beyond that circle, the ocean curves over the horizon and becomes invisible. The world a person on a small boat inhabits is a disk of perhaps 30 square miles, moving across a surface that extends for thousands of miles in every direction.
The sky above is the other dimension. At the latitudes of the eastern Pacific, well away from land, light pollution is absent; on a clear night, the sky is thick with stars. For a navigator using celestial observations, this is not merely beautiful but necessary: each of those stars has a known position in the sky at any given moment, and that position can be used to calculate where you are on Earth’s surface. The sky that Ashcraft navigated by was the same sky that Polynesian wayfinders used centuries earlier, and the same sky that European explorers used in the age of sail.