Instrument approach minimums

T-45C TS INav-07

Interpretation of High Altitude Instrument Approach Plates

Sg 4, fr 2-5

Instrument Approach

Type of approach

Minimums

Straight-in/circling

Precision/nonprecision

Aircraft category

Criteria established for six categories: A,B,C,D,E, and

copter

Generally, only categories C, D, and E are listed in high

altitude terminal approach plates (T-45C falls under C).

Occasionally category B is listed

Ceiling and visibility requirements - criteria used for IFR

destination and alternate filing purposes. Also establishes

takeoff criteria

Ceiling in feet above ground level (AGL)

Prevailing visibility in statute miles (sm)

Runway visual range (RVR) in hundreds of feet (if airport

is so equipped)

Decision height/altitude (DH/DA)/minimum descent altitude

(MDA)

DH/DA applies to precision approaches

MDA applies to nonprecision approaches

Altitudes of DH/DA and MDA are given in feet mean sea

level (MSL) and height above touchdown zone (HAT) or

height above airport (HAA) for circling approach. HAT

and HAA are AGL altitudes

NOTE: DH is being changed to DA to conform to ICAO

standards where "H" is AGL and "A" is MSL

Glideslope angle information for PAR approaches

COMMON ERROR: Not looking up asterisks/symbols that

pertain to modifications of minimums.

NOTE: Use rate-of-climb/descent table on inside back cover.

Page 7-15

(2-02) Original