HAA

abbreviation: Height Above Airport/Aerodrome, also, High Angle of Attack
Found on http://www.encyclo.co.uk/local/20021

HAA

Type: Abbreviation Definitions: 1. Abbreviation for hepatitis-associated antigen.
Found on http://www.medilexicon.com/medicaldictionary.php?t=38961

HAA

2-axle coal hopper wagon traditionally used on MGR trains. Similar types include HCA, HMA.
Found on http://www.scot-rail.co.uk/page/Glossary
No exact match found