Commuter captain believes he made an approach and landing in WX reported below airport landing mins.

Attributes
ACN	195283
Time
Date	199111
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : cid
State Reference	IA
Altitude	agl bound lower : 0 agl bound upper : 1500
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Medium Transport, High Wing, 2 Turboprop Eng
Flight Phase	descent : approach descent other landing other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 7000
ASRS Report	195283
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	non adherence : published procedure non adherence : far
Independent Detector	other flight crewa
Resolutory Action	none taken : detected after the fact
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

ATIS reporting visibility variable 1/4 to 3/8 and tower visibility 2 mi. Outside marker tower advised, 'tower visibility 2 mi cleared to land.' upon further consultation of manual found that if reported visibility and tower visibility are different that lower value of the 2 must be used making the approach and landing in below min conditions.

Original NASA ASRS Text

Title: COMMUTER CAPT BELIEVES HE MADE AN APCH AND LNDG IN WX RPTED BELOW ARPT LNDG MINS.

Narrative: ATIS RPTING VISIBILITY VARIABLE 1/4 TO 3/8 AND TWR VISIBILITY 2 MI. OUTSIDE MARKER TWR ADVISED, 'TWR VISIBILITY 2 MI CLRED TO LAND.' UPON FURTHER CONSULTATION OF MANUAL FOUND THAT IF RPTED VISIBILITY AND TWR VISIBILITY ARE DIFFERENT THAT LOWER VALUE OF THE 2 MUST BE USED MAKING THE APCH AND LNDG IN BELOW MIN CONDITIONS.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.