How many feet does one plane need to be near another plane to violate its air space?

Answer 1

If you are talking about two controlled aircraft, both operating under IFR conditions, it is 1,000ft vertical separation.

There are exceptions to this rule, (i.e. visual separation climb).

All of the Contiguous U.S. operates under RVSM conditions, thus the 2,000' rules generally does not apply, as NON-rvsm approved are generally not allowed to operate at rvsm altitudes of FL290-FL410.

Answer 2

Usally, three plane lengths if in the same direction. Or as is boating crossing in front with a slower or same speed which shows up on radar. The later happens a lot with uncontroled airports especialy when at the end of the day and the fuel truck is about to go back to the barn.

Answer 3

I would assume u mean planes which are in air.
There are many kinds of separation standards for air traffic, depending upon where the planes are.
For IFR (Instrument Flight Rule) flights, vertical separation standards are 2000 ft (above FL290 to at or below FL410) and 1000 ft (at or below FL290, or in RVSM (Reduced Vertical Separation Minimum) Airspace).
Lateral separations are from 3 nautical mile (under radar coverage) to 10 nautical mile, depending upon how far the planes are from the actual radar head. Outside radar coverage,
ie. Oceanic sectors, separation can increase up to 10 minutes or more (time separation) depending upon the speeds of the planes.
There are also separation standards for wake turbulence avoidance. For 2 arriving aircraft, separaton ranges from 4 nm to 6nm, depending on the weight (wake turbulence category) of the aircraft.

Answer 4

If you're referring to a TCAS (Traffic Collision and Avoidance System) alert then it's as follows:

Then the TCAS computes the intruder trajectory, the Closest Point of Approach (CPA) and the estimated time (TAU) before reaching the CPA.



The intruders are classified in four levels :



Proximate

no collision threat

- intruder in the vicinity of the a/c (closer than 6 NM laterally and
± 1200 ft vertically)


Traffic Advisory (TA) potential collision threat

TAU is about 40 seconds


Resolution Advisory (RA) real collision threat

TAU is about 25 seconds


Other intruders no collision threat

any non proximate, TA, RA within the surveillance envelope (lateral range : closer than 30 NM.

Answer 5

I've always understood it to be any aircraft within less than quarter mile (1,320 feet) of another is considered an incursion.

Answer 6

depends on the plane, alt difference and the course.....like if they are both landing or just flying

Answer 7

Look it up. FAR/AIM