This connection deserves attention not only as an explanation for her survival but as a statement about what she actually navigated. She did not navigate the Amazon by compass or map or satellite. She navigated it by the principle that water flows downhill and downhill is toward people. In an environment without roads, without signs, without the ordinary infrastructure that structures navigation in settled landscapes, this single principle — apply it, follow it, trust it — was sufficient to find her way from the middle of the rainforest to human contact.
The principle also determined her pace and her route in another way. Following water means following the watercourse, which meanders, which occasionally deepens or shallows, which sometimes runs through vegetation that requires wading. It does not allow for shortcuts or straight-line travel. But it does allow for continuous forward progress toward a predictable destination. She was not lost. She knew where she was going — toward water, toward larger water, toward the river, toward the camp — even when she could not see more than a few meters in any direction.
The river was not metaphorically her salvation. It was, literally, the mechanism by which she was saved. The principle her father gave her worked because the social geography of the Amazon is organized around rivers, and he knew that, and he told her.
## December 24, 1971: The Wider Context
To understand LANSA Flight 508 in its full context is to understand something about how airline safety has changed over the fifty-plus years since it crashed, and how it has not.