104 Flashcards
MATS ACC > Service Fundamentals >
ATS Surveillance Service
Use an ATS surveillance control procedure….
… in preference to a procedural control procedure unless you or the pilot gain an operational advantage.
Terminav
NAVIGATIONAL ASSISTANCE
The provision of position information, vectors, or track and ground speed checks
MATS > ATS Surveillance > Position Information > Navigation Assistance
Unless specifically prohibited, use ATS surveillance to provide navigation
assistance…
… if a pilot requests it
MATS ACC > Service Fundamentals > ATS Surveillance Service
You may apply ATS surveillance control procedures, provided:
- The aircraft is identified
- The aircraft is in controlled airspace, except as described in Vectoring into
Class G Airspace. - You are in direct communication with the pilot, unless
◦ The aircraft has been cleared for an approach.
◦ You have transferred communication to the tower. - You are satisfied that the displayed ATS surveillance information is adequate.
MATS ACC > ATS Surveillance > Vectoring > Vectoring into Class G Airspace
You may vector an aircraft into Class G airspace if …
…you inform the pilot and obtain the pilot’s approval.
MATS ACC > ATS Surveillance > ATS Surveillance Equipment > ATS Surveillance Failure or Degradation
If you are not satisfied that the displayed ATS surveillance information is adequate:
- Inform the supervisor or delegated authority.
- Base subsequent control actions on direction provided in ATS directives
supplemented by direction from your supervisor or delegated authority. If
such direction is not available, base your actions on your assessment of the equipment.
MATS ACC > Service Fundamentals > Control Service
Provide area, terminal, or oceanic control service to:
- IFR aircraft in controlled airspace
- VFR aircraft in Class A and Class B airspace
Give priority to providing control service. Provide other services to the fullest possible extent.
MATS ACC > Separation > Separation Basics
Separate aircraft consistently according to these fundamentals of safe, orderly, and expeditious control:
- Planning: determine the appropriate separation minimum required
- Executing: implement the selected standard
- Monitoring: ensure that the planned and executed separation is maintained
MATS ACC > Separation > Separation Basics
To ensure an expeditious flow of traffic…
… operate as closely to the prescribed
minimum as circumstances permit. If exceptional circumstances call for extra caution, apply greater separation than the specified minimum.[1]
Radar Ranges
PSR - 80NM
SSR - 250NM
Advantages of SSR
- Facilitates identification of aircraft; eliminates the necessity for identification turns or other cumbersome methods of identification
- Facilitates detection of lost aircraft, or aircraft experiencing an emergency, communication failure or hijack
- Targets can easily be tracked through areas of weather
- Elimination of clutter from weather or permanent echoes
- Enables the capability of displaying information (data tag) for a
given target on the situation display - Reduces communication workload (identification and altitude features)
- Automatic transmission of current altitude information for Mode C equipped aircraft
- Greatly improved and expanded radar coverage for transponder equipped aircraft
Disadvantages of SSR
*******
- Cannot detect targets without a transponder (aircraft, flocks of birds, hot air balloons, etc.)
- Cannot detect weather/precipitation (although we have weather input from other sources that can be shown on the situation display)
- SSR interrogations or returns can be blocked by terrain, buildings or other aircraft; also referred to as “line of sight issues”
MATS ACC > ATS Surveillance > SSRs and Aircraft Codes > Transponders
If the PPS or data tag for a particular aircraft is not displayed as expected
- Instruct the pilot to reset the transponder, stating the currently assigned code.
- If resetting the transponder does not resolve the problem, assign a different code.
If an aircraft’s transponder appears to be unserviceable or malfunctioning, inform the pilot and, if appropriate, the adjacent sector or unit. If an aircraft’s transponder is set to standby or turned off, inform the adjacent sector or unit.
MATS ACC > ATS Surveillance > SSRs and Aircraft Codes > Code
Assignment
Assign an aircraft a discrete code in preference to a non-discrete code.
You may assign a non‑discrete code to either of the following:
- An aircraft that has canceled or closed its IFR flight plan and is not requesting further ATS surveillance service
- A VFR aircraft for which ATS surveillance service is being terminated
Advantages of ADS-B
***
- ADS–B sites can be located in areas where radar installation wasn’t possible due to geography or cost.
- ATS surveillance standards in formerly procedural airspace provide significant fuel savings to aircraft operators.
- Reception of ADS-B signals is not affected by atmospheric conditions.
- Allows for “free flight,” i.e. aircraft routings are not restricted because of procedural separation concerns so they can fly more or less the routes they desire for better winds, weather, etc.
- More reliable than radar in that there are no moving parts to break down.
- Allows for bi-directional exchange of information, i.e. air to ground and ground to air, or air to air.
- More accurate than radar as ADS-B positions are broadcast twice per second versus the typical 5 seconds between radar sweeps.
- There is usually no need to request pilot action to identify the aircraft. If the identification broadcast in the ADS-B message matches our database, the flight will be displayed as a linked ADS–B target and is considered identified.
There are also many instances where aircraft will squawk non-discrete
codes. Here are 3 examples:
i. An IFR aircraft that departs an uncontrolled airport should squawk 1000 (or 2000) depending on requested altitude. Once airborne, the pilot will contact ATC for their IFR clearance. The
controller will issue the clearance as well as the discrete code and the aircraft will correlate.
ii. Oceanic aircraft will be squawking 2000 prior to contacting ATC for their discrete code.
iii. VFR aircraft will squawk a 1200 or 1400 code unless otherwise instructed by ATC
Disadvantages of ADS-B
- Not all aircraft are equipped with the appropriate Mode S transponder.
- Maintenance can be difficult for ADS-B ground-based sites located in remote areas. Outages can last for long periods of time. For space-based ADS-B, a satellite outage will result in a relatively small coverage gap that moves very rapidly.
- Range is only 180 NM for a ground-based ADS-B receiver; space based ADS-B provides global coverage.
Advantages of MLAT
- Can be installed at a very low cost at airports and surrounding areas where radar is not available
- Requires no extra equipment by the aircraft
- Updates position of aircraft every second, making it more accurate than radar, and targets move smoothly across the situation display
- Enables ground controllers (or flight service specialists) to have real-time situational awareness of aircraft and vehicle positions on the aerodrome
MATS ACC > ATS Surveillance > ATS Surveillance Equipment > Situation Display
Display and monitor:
- Altitude readouts (mode C)
- Appropriate geographic map
- CJSs
- Coast list in a full format showing all pertinent information (to enable prompt detection of newly de-linked aircraft)
- Current weather data and history, as necessary, for the provision of severe
weather information[3] - VMI
- Unlinked targets[1]
- Other features of the system may be used at your discretion.
ALPHA TAG
- WAKE TURBULENCE
- ACID
- SFI
- ALTTITUDE READOUT
- VMI
- GROUND SPEED
BRAVO TAG
- CJS
- ALTITUDE
- VMI