When does this start?<\/h4>\n\n\n\n
It already has! It’s starting out as a trial (everything on the NAT starts out as a trial), and some members are already reporting getting “RESUME NORMAL SPEED” messages from Shanwick. The official start date is April 8, 2019. Three OACC’s are doing this – Shanwick, Santa Maria, and New York Oceanic (not WATRS).<\/p>\n\n\n\n You’ll get a normal oceanic clearance, with a fixed Mach Number, like you always did. Somewhere after the Oceanic Entry Point, if you are selected for the trial, you’ll get a CPDLC message saying RESUME NORMAL SPEED<\/strong>. You should reply with WILCO<\/strong>. What that means is: Fly ECON, or a Cost Index with Variable Mach<\/strong>.<\/p>\n\n\n\n Correct! But, ATC will expect you to fly ECON\/Cost Index, and normally, that should be pretty close to your cleared Mach (within 0.01 up or down). If you’re doing something different, tell them. If the resulting speed differs from your Oceanic Clearance Mach by 0.02<\/strong>, or more, you must tell ATC.<\/p>\n\n\n\n \u2022 Flight must be data link connected to EGGX \u2022 Flight must be data link connected to LPPO or KZWY (Thanks, Jeff Miller @IATA, for this and the condensed info above!)<\/em><\/p>\n\n\n\n Both Airbus and Boeing advocate cost index (ECON) as the most efficient way to fly. Operators use cost index (ECON) globally, except for the North Atlantic (NAT) where flights are assigned a fixed Mach by ATC and flight crews are required to fly the assigned Mach. Depending on the distance from the departure airport to the oceanic entry, most operators flight plan the aircraft with cost index to the oceanic entry point and again after oceanic exit. Flight crews use the desired fixed Mach number from the computer flight plan that is generated by the cost index, as the requested Mach number for the crossing. It is possible the flight crew may request a Mach greater than or less than the flight plan Mach to improve scheduled arrival time. IATA led the ICAO NAT, Operations Without an Assigned Fixed Speed (OWAFS) project team to enable the use of a variable Mach in the NAT. The North Atlantic Systems Planning Group (NAT SPG) is expected to fully endorse OWAFS late June 2019 for an official implementation in late 2019 for all NAT OCAs. Full automation for all Air Navigation Service Providers (ANSPs) is expected by Q1 2020. <\/p>\n\n\n\n Yep, but remember, if you’re slowing down or speeding up significantly (0.02 or more), tell ATC your new speed.<\/p>\n\n\n\n That’s it for now. Remember, it’s a trial – later in the year full implementation is expected. Don’t ask for it if you aren’t offered, unless you’re in New York or Santa Maria airspace. Tell ATC if you’re changing by 0.02 or more from the Oceanic Clearance.<\/p>\n\n\n\n![\"\"](\"https:\/\/ops.group\/blog\/wp-content\/uploads\/2019\/05\/oceanic-ops-room-system-control-1989-5-1024x649.png\")
How does it work?<\/h4>\n\n\n\n
So, once I get that, no restrictions on speed?<\/h4>\n\n\n\n
Rules for Shanwick (Don’t ask for it)<\/h4>\n\n\n\n
\u2022 Flight must be eastbound and operating solely in Shanwick Oceanic airspace and exiting into UK\/Ireland\/Continental European airspace
\u2022 Flight cannot exit into Santa Maria
\u2022 RESUME NORMAL SPEED will be offered on a \u201cmanual\u201d tactical basis
\u2022 Do not request<\/strong> RESUME NORMAL SPEED <\/p>\n\n\n\nRules for New York and Santa Maria (You can ask)<\/h4>\n\n\n\n
\u2022 Flights must be wholly within Santa Maria and New York East Oceanic airspace and not enter Gander or Shanwick airspace
\u2022 Flights can enter New York East Oceanic airspace or Santa Maria airspace from Gander airspace or Shanwick airspace and receive RESUME NORMAL SPEED uplink message
\u2022 New York West (WATRS airspace) is excluded
\u2022 RESUME NORMAL SPEED can be requested<\/strong> if not offered<\/p>\n\n\n\nBackground and History<\/h4>\n\n\n\n
So I can use this for turbulence speed changes?<\/h4>\n\n\n\n
Anything else?<\/h4>\n\n\n\n