# What does “500 and 1” mean?

In this AVWeb article, numerous references are made to 500 and 1, with other references to 3,000 and 5.

Based on the statement The current observation was 800 overcast and four miles visibility (in the second paragraph), I would presume that 500 and 1 means a 500 foot ceiling and one mile visibility, is that correct?

• I think you have a typo in your question -- you say "...was 800 overcast and four miles...", but then say "...a 500 foot ceiling and one mile..." – Johnny Feb 3 '15 at 21:00
• @Johnny, no typo: based on the second statement, I was assuming a meaning for the first statement. The question was for confirmation that my assumption was correct. I have edited to add some clarity. – FreeMan Feb 3 '15 at 21:48