radar separation

The separation used when aircraft position information is derived from radar sources (ICAO). The traffic is spaced out in accordance with the established minimums. The separation minimums are basically 5 NM and, at the discretion of the authority, when within 40 NM of the radar and below flight level 245, 3 NM; both these assume that primary and secondary radars are available. If only the secondary is available, then the radar separation is 8 NM.

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That takes longer than the more sophisticated radar separation used in Singapore and elsewhere in the world, which allows a controller to more quickly take stock of radar returns from all aircraft in the area.

Crowded skies in Southeast Asia put pressure on pilots and air traffic control

The Juneau WAM system uses multilateration to provide controllers at the Anchorage Air Route Traffic Control Center with high accuracy, high availability surveillance of aircraft and helicopters, enabling ATC-provided radar separation and traffic advisory services to pilots operating in the Juneau airspace.

Sensis WAM deployment at Juneau airport granted FAA certification

When I say "change to advisory frequency", that's the same as saying, "radar service terminated." We just leapt from radar separation to IFR non-radar separation standards.

ONE IN OR ONE OUT: The flexibility of flying IFR into a non-towered airport can sometimes seem at odds with ATCs separation requirements

Radar separation rules still apply: three miles horizontally, 1000 feet vertically, or at least 15 degrees of divergence.

TAKING A LAP: While go-arounds can change ATC's immediate traffic flow, quick thinking and action can minimize the impact to the overall traffic situation

The Controller's Handbook 9-3-2b requires controllers to provide radar separation of three miles (six miles above FL 600) from special use airspace.

Echoes of errors past: ATC's equivalent of a running start, "Line Up And Wait" balances oft-needed efficiency with some serious risk management

Radar separation between IFR airplanes requires 1000 feet vertical separation or three miles laterally for radar approach controls.

Against the flow

If you're climbing high, ATC needs to ensure vertical or horizontal radar separation between you and other traffic before you reach flight level 180.--TK

Mark 1 Eyeball

Radar controllers don't have that luxury for nontowered fields and need that radar separation.

No tower, no problem: what keeps IFR planes flowing in and out of nontowered airports? Good teamwork, specialized phraseology, and reasonable expectations

Minimum required radar separation from the MOA boundary is three miles.

Not for the MOA

When a major airport's weather drops below VFR minimums, its traffic capacity drops considerably because they must now use radar separation.

Standards of separation: while you're IFR, controllers guarantee certain distances from stationary objects or other flying machines--unless you step in