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6-4-4. SEPARATION BY PILOTS
When pilots of aircraft on the same course in direct
radio communication with each other concur, you
may authorize the following aircraft to maintain
longitudinal separation of 10 minutes; or 20 miles
between DME equipped aircraft; RNAV equipped
aircraft using ATD; and between DME and ATD
aircraft provided the DME aircraft is either
10,000feet or below or outside of 10 miles from the
DME NAVAID.
PHRASEOLOGYMAINTAIN
AT LEAST ONE ZERO MINUTES/
TWOZERO MILES SEPARATION FROM (ident).
6-4-5. RNAV AIRCRAFT ALONG VOR
AIRWAYS/ROUTES
Advise the pilot to use DME distances when applying
DME separation to an RNAV aircraft operating along
VOR airways/routes.
PHRASEOLOGYUSE
DME DISTANCES.
NOTEATD
derived from area navigation devices having
slant‐range correction will not coincide with the direct
DME readout.
2/14/08 JO 7110.65S
Lateral Separation 6-5-1
Section 5. Lateral Separation
6-5-1. SEPARATION METHODS
Separate aircraft by one of the following methods:
a. Clear aircraft on different airways or routes
whose widths or protected airspace do not overlap.
b. Clear aircraft below 18,000 to proceed to and
report over or hold at different geographical locations
determined visually or by reference to NAVAIDs.
c. Clear aircraft to hold over different fixes whose
holding pattern airspace areas do not overlap each
other or other airspace to be protected.
d. Clear departing aircraft to fly specified
headings which diverge by at least 45 degrees.
6-5-2. MINIMA ON DIVERGING RADIALS
a. Consider separation to exist between aircraft:
1. Established on radials of the same NAVAID
that diverge by at least 15 degrees when either aircraft
is clear of the airspace to be protected for the other
aircraft.
2. With non-VOR/DME based navigational
equipment established on tracks of the same
waypoint that diverge by at least 15 degrees when
either aircraft is clear of the airspace to be protected
for the other aircraft.
FIG 6-5-1
Minima on Diverging Radials
NOTEThe
procedure may be applied to converging as well as
diverging aircraft. (See FIG 6-5-1.) The aircraft depicted
6 miles from the NAVAID/waypoint would require vertical
separation until reaching the 6-mile point. Reversing
direction, the same aircraft would require vertical
separation before passing the 6-mile point. Due to the
nature of GPS equipment, issue crossing restrictions in
reference to the next waypoint, since the pilot receives
tracking “to” data rather than tracking “from” the last
waypoint.
b. Use TBL 6-5-1 and TBL 6-5-2 to determine
the distance required for various divergence angles to
clear the airspace to be protected. For divergence that
falls between two values, use the lesser divergence
value to obtain the distance.
TBL 6-5-1
Non-DME Divergence
Distance Minima
Divergence (Degrees) Distance (NM)
15 16
20 12
25 10
30 8
35 7
45 6
55 5
90 4
NOTE: This table is for non-DME application only.
TBL 6-5-2
Divergence
Distance Minima
Divergence
(Degrees)
Distance (NM)
Below FL 180 Fl 180 through
FL 450
15 17 18
20 13 15
25 11 13
30 9 11
35 8 11
45 7 11
55 6 11
90 5 11
NOTE: This table is for DME application and
compensates for DME slant‐range error.
JO 7110.65S 2/14/08
6-5-2 Lateral Separation
NOTEFor
altitudes of 3,000 feet or less above the elevation of the
NAVAID, DME slant‐range error is negligible and the
values in TBL 6-5-1 may be used.
6-5-3. DME ARC MINIMA
Apply lateral DME separation by requiring aircraft
using DME to fly an arc about a NAVAID at a
specified distance using the following minima:
(See FIG 6-5-2.)
FIG 6-5-2
DME Arc Minima
REFERENCEFAAO
JO 7110.65, Para 2-5-2, NAVAID Terms.
a. Between different arcs about a NAVAID
regardless of direction of flight:
1. At 35 miles or less from the NAVAID-
10miles.
2. More than 35 miles from the NAVAID-
20miles.
b. Between an arc about a NAVAID and other
airspace to be protected: (See FIG 6-5-3.)
FIG 6-5-3
DME Arc Minima
NOTEThe
other airspace to be protected may be a MOA, a
holding pattern, airway or route, ATCAA, Warning Area,
Restricted Area, Prohibited Area, etc.
1. At 35 miles or less from the NAVAID-
5miles.
2. More than 35 miles from the NAVAID-
10miles.
PHRASEOLOGYVIA
　
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