The scope of this document is limited to descriptions of the display characteristics of the Flight Dynamics, Inc. (FDI) Model 1000WS Head up Guidance System (HGS) as installed on the Boeing 727 airplane and certified by the Federal Aviation Administration for use in Category III landing operations. The symbology depicted in this document is referenced to the particular pilot task(s) for which it was designed. Also included are descriptions of operational features of the particular symbol along with any associated criteria regarding symbology constraints, source data, or position error.
SAE AIR4742-1998 history
2012SAE AIR4742A-2012 Display Characteristics of FDI Head-Up Guidance System as Approved for the B-727 Airplane (Stabilized Type)
2006SAE AIR4742-2006 Display Characteristics of FDI Head-Up Guidance System as Approved for the B-727 Airplane
1998SAE AIR4742-1998 Display Characteristics of FDI Head-Up Guidance System as Approved for the B-727 Airplane