ENC : enroute navigation chart /
Navtech, Inc.
"Navtech Charts were designed using research from Human Factor specialists and by working closely with pilots to create effective and user-friendly aeronautical charts. Each chart has all labels clearly marked, intuitive symbology, a communication box with applicable frequencies on all chart types and improved presentation of altitudes, including presentations of take-off minima on aerodrome charts along with depictions of landing minima." - publisher's website.
Graphic indexes in central file under "World"
Aeronautical charts.