Aero-Terms are designed to be a daily reminder of the terms,
names, acronyms and explanations of the unique language that
populates the aviation world. Aerospace, sport aviation, fixed
wing, helo, you name it... it's all fair game.
Aero-Terms should serve as a quick but intriguing reminder of
the terms you may use every day, or an introduction to an aspects
of the Aero-World you may not yet be familiar with. ANN also
encourages readers to go beyond the FMI link, and further research
any intriguing terms.
Suggestions for future Aero-Terms are ALWAYS welcome, as are
additions or discussion of the explanations given for each
Issued when fog reduces visibility to 1/8 mile or less over a
widespread area. For marine products: An advisory for widespread or
localized fog reducing visibilities to regionally or locally
defined limitations not to exceed 1 nautical mile.