• 3 defintions found in Acronymia,
• 4 defintions found in AcroLexic: Acronyms and Abbreviations Dictionary:

OCH

Office of the Chief Hydrologist

airport code: Nacogdoches, Texas, Usa

obstacle clearance height

AcroLexic: Dictionary of Acronyms and Abbreviations contains 1 more definition of “OCH”.

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