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Oceanic Control Procedures


Jack Edwards

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    • Jack Edwards
      By Jack Edwards
      An alternative controller pack for Shanwick Oceanic based on the UK Controller Pack.
      Vanilla EuroScope (no vNAAATS plugin) Tag family similar to domestic "AC" tag family simulates display of ADS-B data UKCP plugin enables display of clearances from natTRAK website All adjacent sectors and frequencies correct as of 2021/04 (CTP Westbound 2021) Sector Ownership set automatically A new oceanic spreadhseet which integrates with the natTRAK website is also available, simply click the refresh button to sync clearances/requests from natTRAK. This should make it easier to identify conflicts between clearances issued manually and those issued via natTRAK. (For CTP, clearances will be issued via natTRAK so this spreadsheet is designed primarily to be used outside of CTP/as a backup).
      https://docs.google.com/spreadsheets/d/1_g3-uXsikPFWxHq39ukK90hO2aWiKzuPbiyW1fQXdRY/edit#gid=0
    • Jack Edwards
      By Jack Edwards
      Simply click the refresh button to sync clearances/requests from natTRAK.
      https://docs.google.com/spreadsheets/d/1_g3-uXsikPFWxHq39ukK90hO2aWiKzuPbiyW1fQXdRY/edit
    • Jack Edwards
      By Jack Edwards
      The following Oceanic Controller Packs are available:
      1. Combined Shanwick and Gander Oceanic Controller Pack published by the AeroNav association:
      vNAAATS plugin integration (other than for CTP Westbound 2021) Utilises GNG system to keep sectors and frequencies updated. Download link: http://files.aero-nav.com/EXCXO
       
      2. Shanwick Controller Pack (Alternate) published by the VATSIM UK Operations Department:
      Intended as a stable alternative for controllers familiar with the domestic UK Controller Pack Can also be used to control Gander Oceanic positions Vanilla EuroScope (no vNAAATS plugin) Tag family similar to domestic "AC" tag family which simulates display of ADS-B data UKCP plugin enables display of clearances from natTRAK website in 'Sector Inbound List' All adjacent sectors and frequencies updated to match latest release of 'Oceanic Control Procedures' document  
    • Jack Edwards
      By Jack Edwards
      Effective 25 March 2021
      This procedure change highlights only the most critical changes - Shanwick endorsed controllers are strongly recommended to review the latest release of:  Shanwick (EGGX) & Gander (CZQX) Oceanic Control Procedures
      Background
      Previously, ATS within the NAT Region was provided procedurally using position reports. Shanwick and Gander can now utilise space-based surveillance systems such as Automatic Dependent Surveillance (ADS). Communication can be over voice or via Controller-Pilot Datalink Communication (CPDLC) where aircraft equipment allows. 
      Surveillance
      ADS coverage is assumed throughout the Shanwick & Gander OCAs. Simulated ADS-B data and position reports are assumed to be received through the VATSIM network which are then interpreted and displayed by controller clients or relevant plugins.
      In the real-world, a series of navigation, communications and surveillance standards are defined in order to enhance the provision of ATS within the shared Oceanic Control Area. These specifications allow for reduced separation standards to be implemented between suitably equipped aircraft pairs as well as reduce the need for voice communications.

      On VATSIM, these specifications are simplified and divided into 2 categories:
      ADS-B equipped aircraft; Non-ADS-B equipped aircraft (other aircraft). ADS-B equipped aircraft are assumed to:
      comply with the requirements and specifications of the Datalink Mandate (DLM); comply with the requirements for Performance Based Communication and Surveillance (PBCS); comply with the requirements for Advanced Surveillance Enhanced Procedural Separation (ASEPS); provide electronic position reports through ADS-C and/or CPDLC. Non-ADS-B equipped aircraft (other aircraft) are assumed to:
      not comply with the requirements and specifications of the Datalink Mandate (DLM); not comply with the requirements for Performance Based Communication and Surveillance (PBCS); not comply with the requirements for Advanced Surveillance Enhanced Procedural Separation (ASEPS); not provide electronic position reports through ADS-C and/or CPDLC.  
      Position Reports
      On VATSIM, the requirement for voice position reports is dependent on aircraft equipment code.
      ADS-B equipped aircraft – position reports optional Other aircraft – position reports mandatory Note: Aircraft that are not equipped with ADS-B are also considered to not be equipped with ADS-C or CPDLC, which would provide automatic/electronic position reporting functionality.
      Note: For some events, it may be necessary to mandate that all pilots do not provide position reports due to frequency congestion
       
      Separation Standards
      The separation standards are divided into two categories based on ADS-B equipage. In order to apply ADS-B based separation minima between two aircraft, both aircraft must be equipped with ADS-B. Real-world separation minima have been simplified for use on VATSIM.
      Note: ADS-B does not allow controllers to assign headings to aircraft as they would in domestic, radar-controlled airspace. It merely allows for more accurate monitoring of aircraft position. The only practical way to intervene in order to prevent a conflict at a late stage is to apply vertical separation.
      Lateral Separation on Parallel or Non-intersecting Tracks
      19 NM for ADS-B equipped aircraft pairs; 60 NM or 1 degree (subject to gentle slope rules) for other aircraft pairs; Longitudinal Separation (Crossing Tracks Same Direction)
      15 NM for ADS-B equipped aircraft pairs; 10 minutes for other aircraft pairs on the same track (can be reduced using Mach-number technique); 15 minutes for other aircraft pairs on crossing tracks; Longitudinal Separation (Crossing Tracks Opposite Direction)
      If opposite direction aircraft will occupy portions of tracks that are not laterally separated at the same time then vertical separation must be established at least 15 minutes prior to the closest point of approach for all aircraft. Vertical separation is no longer required once both aircraft have passed each other by: 5NM for ADS-B equipped aircraft pairs; 10 minutes for other aircraft pairs;  
      Transfer of Control and Communications
      Transfer of control and communications is at the receiving sector boundary except:
      For aircraft entering the Shannon (EISN) FIR (or NOTA/SOTA) from Shanwick between SUNOT and BEDRA (inclusive): Transfer of Control – sector boundary Transfer of Communications – 1 degree prior to sector boundary  
      Phraseology
      Initial Check in (ADS-B Equipped)
      TOM124
      Shanwick Radio, TOMJET124, Santa Maria next, request SELCAL check.
      EGGX_FSS
      TOMJET124, Shanwick Radio, at 45N contact Santa Maria on 132.075, standby for SELCAL check.
      Selcal tone triggered
      TOM124
      TOMJET124, SELCAL check OK.
      EGGX_FSS
      Shanwick Radio.
      Note: ADS-B equipped aircraft are still required to monitor the frequency until reaching the transfer of communication point specified over voice
       
      Documentation Status
      This procedure will be incorporated into version 2021 03 of the Shanwick (EGGX) & Gander (CZQX) Oceanic Control Procedures document.
    • VATSIM UK
      By VATSIM UK
      A guide to Oceanic Control in the Shanwick and Gander FIRs.
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