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What's SID what's STAR ???

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  • What's SID what's STAR ???

    can somebody explain me what's SID and what's STAR ??? Also where and when to use them ?

  • #2
    SIDS and STARS are instrument arrival and departure procedures used for busier airports, or airports in congested airspace. They are a way to funnel traffic in and out of those types of airports.

    They have charted courses to be flown, and may contain both altitude and speed restrictions. When flying one, you'll be given a clearance to go to whatever fix, and join the arrival. If you're flying a pilot nav SID (one where radar vectors to a given fix are not provided), you will follow the charted instructions to join the appropriate transition (route you take away from the airport).

    If the airport you're flying into or out of has them, chances are you'll be cleared in or out via a SID or STAR.

    They're a reasonably efficient way to move a lot of airplanes through a confined area, and keep arrivals and departures out of each others' way.
    Bite me Airways.....


    • #3
      The acronym expanded is...

      SID= Standart Instrument Departure

      STAR= Standard Terminal Arrival Route

      A SID is a departure "rule" so to speak and they all have names. Like at YYZ, one SID is called "LESTER7". The Lester 7 departure has different proceedures for different runways. Its usually Climb and Maintain 5000 feet runway heading and from there on ATC will contact you when they give you clearnce on route.

      Some SID's have noise abatment proceedures. Meaning theres different rules then day time then there are at night. I dont know any for YYZ for for any airport in that matter.

      For a STAR, at YYZ if you were comming from YUL, you would most likly use the SIMCO2 arrival. Once again, this has different proceedures for every runway.

      If you were going to land on 24R, you would cross the SIMCO VOR and then WASIE at its posted speed and altitude. Then, you would follow the proccedures (by connecting at different intersections) to get to 24R.

      Take alook at this HUGE .pdf chart. Shows all the different arrivals and departures at YYZ.


      • #4
        Most SIDs in Canada are "vectored SIDs" with the exception of a few at Toronto and other urban areas which have noise abatement procedures included in certain SIDs.

        A good definition for a SID is a pre-defined lateral and vertical transition into controlled airspace.

        A vectored SID, such as the LESTR7, or YHZ3, is runway heading to 5000ft, then as directed by ATC.

        Below is the Halifax 3-

        Some SIDs, like the JEMSEG1 in YFC, Fredericton, have procedures included.. for example, CYR724, the Gagetown Firing Range, is to the South of Frederiction.

        For Runway 15 Eastbound departures, the JEMSEG ONE is - "Climbing LEFT turn to hdg '059 as soon as practicable for vectors. Climb to and maintain 5000 ASL" Notice how the 5000' is still included, but instead of runway heading, a vector is given for "as soon as practicable" to avoid flying into the CYR. The cap is FL250, so overflights don't have a problem, but departures do.

        STARs are lateral and vertical arrival routes into airports. Note that not all airports have them, but those that see the traffic often have one for every cardinal direction. Toronto is a good example, with the SIMCO, MANS, WATERLOO and YOUTH arrivals.

        These can vary airport to airport, some including navigation by means of DME distances, pre-determined holding points, called "stacks" and RNAV arrivals.

        All STARs into Halifax Intl, CYHZ, are RNAV STARs.

        Lets look at the FUNDY6

        You'll see all the lines stem off of "CETTY" intersection - think of this as the transition to the approach phase of your flight.

        Lets assume we're going to land on Runway 24 (Now called 23, but for the KISS principle, we'll use 24)

        From CETTY, you will navigate to MODIR then LOGPO to be at or above 4100' at DUTIR.. we know this because there is a line below DUTIR. Had there been a line above, it would mean at or below 4100', and had there been a line on top and bottom, it would mean at 4100', not above or below.

        Notice as well that DUTIR has (DTW) above it - this is whats called the "Downwind Termination Waypoint"

        If, at that point, you have not recieved clearance for the approach (Clrd Halifax airport ILS23 via FUNDY6) then you fly the depicted heading for vectors. In this case, we'll assume you've been cleared for the approach. From DUTIR, turn to LEROS, and join the localiser once you can.

        They do get different based on various countries - IE the UK, LHR for example, has Stacks. You will hold at a stack at a certain FL (Flight level) and then descend with the rest of the traffic, eventually getting pulled out of the stack and vectored to one of the runways. (Just a rudamentary explanation, I'm sure someone with UK flying experience or ATCO experience can cover this more indepth)