Pilot/Controller Glossary

STRAIGHT-IN APPROACH IFR- An instrument approach wherein final approach is begun without first
having executed a procedure turn, not necessarily completed with a straight-in landing or made to straight-in
landing minimums.
(See LANDING MINIMUMS.)
(See STRAIGHT-IN APPROACH VFR.)
(See STRAIGHT-IN LANDING.)

STRAIGHT-IN APPROACH VFR- Entry into the traffic pattern by interception of the extended runway
centerline (final approach course) without executing any other portion of the traffic pattern.
(See TRAFFIC PATTERN.)

STRAIGHT-IN LANDING- A landing made on a runway aligned within 30_ of the final approach course
following completion of an instrument approach.
(See STRAIGHT-IN APPROACH IFR.)

STRAIGHT-IN LANDING MINIMUMS-
(See LANDING MINIMUMS.)

STRAIGHT-IN MINIMUMS-
(See STRAIGHT-IN LANDING MINIMUMS.)

STRATEGIC PLANNING- Planning whereby solutions are sought to resolve potential conflicts.
sUAS-
(See SMALL UNMANNED AIRCRAFT SYSTEM.)

SUBSTITUTE ROUTE- A route assigned to pilots when any part of an airway or route is unusable because of
NAVAID status. These routes consist of:
a. Substitute routes which are shown on U.S. Government charts.
b. Routes defined by ATC as specific NAVAID radials or courses.
c. Routes defined by ATC as direct to or between NAVAIDs.
SUNSET AND SUNRISE- The mean solar times of sunset and sunrise as published in the Nautical Almanac,
converted to local standard time for the locality concerned. Within Alaska, the end of evening civil twilight and
the beginning of morning civil twilight, as defined for each locality.
SUPPLEMENTAL WEATHER SERVICE LOCATION- Airport facilities staffed with contract personnel who
take weather observations and provide current local weather to pilots via telephone or radio. (All other services
are provided by the parent FSS.)
SUPPS- Refers to ICAO Document 7030 Regional Supplementary Procedures. SUPPS contain procedures for
each ICAO Region which are unique to that Region and are not covered in the worldwide provisions identified
in the ICAO Air Navigation Plan. Procedures contained in Chapter 8 are based in part on those published in
SUPPS.
SURFACE AREA- The airspace contained by the lateral boundary of the Class B, C, D, or E airspace designated
for an airport that begins at the surface and extends upward.
SURFACE METERING PROGRAM- A capability within Terminal Flight Data Manager that provides the user
with the ability to tactically manage surface traffic flows through adjusting desired minimum and maximum
departure queue lengths to balance surface demand with capacity. When a demand/capacity imbalance for a
surface resource is predicted, a metering procedure is recommended.
SURFACE VIEWER- A capability within the Traffic Flow Management System that provides situational
awareness for a user-selected airport. The Surface Viewer displays a top-down view of an airport depicting
runways, taxiways, gate areas, ramps, and buildings. The display also includes icons representing aircraft and
vehicles currently on the surface, with identifying information. In addition, the display includes current airport
configuration information such as departure/arrival runways and airport departure/arrival rates.