US PATENT SUBCLASS 342 / 64
.~.~ With map matching

Current as of: June, 1999
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342 /   HD   COMMUNICATIONS: DIRECTIVE RADIO WAVE SYSTEMS AND DEVICES (E.G., RADAR, RADIO NAVIGATION)

61  DF  RETURN SIGNAL CONTROLS EXTERNAL DEVICE {7}
63  DF  .~ Aircraft guidance {2}
64.~.~ With map matching

DEFINITION

Classification: 342/64

With map matching:

(under subclass 63) Subject matter including means to compare radar data with previously stored location information to derive guidance signals.