Supersonic Transport — Page 46, Lesson 38

I want to walk you through a set of aviation abbreviations and terms that you’ll see in communications and navigation procedures. We’re starting with the letter S and moving into T. Let’s go through them one by one, with the exact definition and what it means in practice. First, SHINGALS stands for Supplementary High Intensity Narrow Gauge Approach Lighting System. That’s a specific type of approach lighting — high intensity, narrow gauge — used to supplement the main lighting when you’re lining up for a landing. SID is Standard Instrument Departure. This is a published procedure you follow after takeoff, under instrument flight rules, to get from the airport onto the en route structure. SIF is Selective Identification Feature. That’s a mode within the transponder system that lets air traffic control selectively address and identify a specific aircraft. STA means Straight-in Approach. That’s an approach where you align directly with the runway centerline without first flying a circuit or a base leg. STAR is Standard Instrument Arrival. That’s the published procedure you fly to transition from the en route phase into the terminal area, leading toward an instrument approach. SIGMET is information concerning en route weather phenomena which may affect the safety of aircraft operations. So a SIGMET warns you about significant weather like severe turbulence, icing, volcanic ash, or thunderstorms along your route. STD is Standard — used to indicate something is set to the standard value, like standard pressure. STF is Stratiform — describing cloud or precipitation that’s layered and widespread, not convective. STN is Station — a location, like a radio station or a reporting station. STNR is Stationary — not moving, like a stationary front or a stationary weather system. SIGWX is Significant Weather — the type of weather depicted on significant weather charts. SIMUL means Simultaneous or Simultaneously — used in procedures like simultaneous parallel approaches. SIWL is Single Isolate Wheel Load — the load on one isolated wheel of an aircraft, used for pavement strength calculations. SKC is Sky Clear — no cloud cover reported. SKED is Schedule or Scheduled — as in a scheduled flight or scheduled maintenance. SLAP is Slot Allocation Procedure — the process for assigning departure or arrival slots at coordinated airports. SLP is Speed Limiting Point — a point on a departure or arrival procedure where a speed restriction applies. SLT is Slot Allocation Message — the message that communicates the slot assignment. SLW is Slow — used in weather reports or clearances. SMB is Side Marker Boards — visual aids on the ground, likely at runway or taxiway edges. SMC is Surface Movement Control — the air traffic control function responsible for aircraft and vehicle movements on the maneuvering area, typically called ground control. SMR is Surface Movement Radar — the radar used to monitor traffic on the airport surface. SN is Snow — the weather phenomenon. SNOWTAM is a special series NOTAM notifying the presence or removal of hazardous conditions due to snow, ice and slush, or standing water associated with snow, ice and slush, on the movement area, by means of a specific format. So if there’s snow on the runway, you get a SNOWTAM telling you exactly where and how bad. SOC is Start of Climb — the point where the aircraft begins its climb after takeoff. Sodium Box refers to sodium approach lights arranged in box formation — a specific layout of high-intensity approach lights. SPECI is an aviation selected special weather report in aeronautical meteorological code — a special observation taken when conditions change significantly between routine reports. SPECIAL is the same type of report but in abbreviated plain language. SSW is South South West — a compass direction. ST is Stratus — a low, layered cloud type. STOL is Short Take Off and Landing — referring to aircraft designed for short runways. STS is Status — used in messages to indicate the status of a facility or system. STWL is Stopway Light(s) — lights marking the stopway area beyond the runway end. SUBJ is Subject to — as in “subject to ATC clearance.” SUN is Sunday. SUP is Supplement — specifically an AIP Supplement, a temporary change to the Aeronautical Information Publication. SUPPS are Regional Supplementary Procedures — procedures that supplement the standard ICAO procedures for a specific region. SVC is Service message — a type of message in aeronautical communications. SVCBL is Serviceable — meaning the equipment or facility is working. SVCE is Service — as in ground service or maintenance service. SVFR is Special Visual Flight Rules — a special set of rules that allow VFR flight in weather conditions that would normally require IFR, typically within a control zone. SW is South West. SWB is South Westbound — a direction of flight. SWY is Stopway — the area beyond the runway end, usable for an aborted takeoff but not for normal landing or takeoff roll. Now moving into the letter T. T is Temperature. TA is Transition Altitude — the altitude at which you change from local pressure setting (QNH) to the standard pressure setting of 1013.25 hPa. TACAN is UHF Tactical Air Navigation Aid — a military navigation system that provides bearing and distance, operating in the UHF band. TAF is Terminal Aerodrome Forecast — a weather forecast for the area within about five nautical miles of an airport. TAIL is Tail wind — wind blowing from behind the aircraft. TAR is Terminal Area Surveillance Radar — radar used to monitor traffic in the terminal area around an airport. TAS is True Airspeed — the actual speed of the aircraft through the air, corrected for altitude and temperature. That covers the full set of definitions from SHINGALS through TAS. These are all standard abbreviations you’ll encounter in flight planning, weather briefings, and ATC communications.