Terminal conflict alert (CA). 

 - [Washington, D.C.,  1977]. 
 - v. 
<br/><br/> 9/1/77.  CRDP Program Historic Shelflist record. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Aeronautics--Safety measures.<br/>Collision avoidance.
<br/><br/><label>Gov. Doc. Class. No.: </label>TD 4.8/5:90-77