qdt.

Tool · mentioned in 1 journal entry

Planning Westward Fort Clatsop Return Post-expedition NPS L&C NHT trail data © National Park Service
AI-extracted reference. Each entry below was identified by AI as mentioning qdt.. Spelling variants may not be merged. see related variants →
Clark: June 13, 1804
William Clark · Jun 13, 1804 · Missouri River near Jefferson City area
"quadrant used for altitude observation"

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