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appropriate longitudinal minimum exists ahead of the
first or behind the last aircraft operating within the
reservation.
c. Vertically: Clear aircraft so that vertical
separation exists while the aircraft is within a
(time‐dependent) geographical area defined as the
moving airspace reservation plus a buffer around the
perimeter equivalent to one‐half the lateral separation
minimum.
JO 7110.65S 2/14/08
8-6-2
2/14/08 JO 7110.65S
North Atlantic ICAO Region 8-7-1
Section 7. North Atlantic ICAO Region
8-7-1. APPLICATION
Provide air traffic control services in the North
Atlantic ICAO Region with the procedures and
minima contained in this section except when noted
otherwise.
8-7-2. VERTICAL SEPARATION
Provide vertical separation in accordance with
Chapter 4, IFR, Section 5, Altitude Assignment and
Verification.
8-7-3. LONGITUDINAL SEPARATION
In accordance with Chapter 8, Offshore/Oceanic
Procedures, Section 3, Longitudinal Separation,
apply the following:
a. Supersonic flight:
1. 10 minutes provided that:
(a) both aircraft are in level flight at the same
Mach number or the aircraft are of the same type and
are both operating in cruise climb, and one of the
following;
(1) The aircraft concerned have reported
over a common point; or,
(2) If the aircraft have not reported over a
common point, the appropriate time interval being
applied between aircraft exists and will exist at the
common point; or,
(3) If a common point does not exist, the
appropriate time interval being applied between
aircraft exists and will exist at significant points along
each track.
2. 15 minutes between aircraft in supersonic
flight not covered in subpara a1 above.
b. Turbojet operations (subsonic flight):
1. Apply the prescribed minima in accordance
with para 8-3-3, Mach Number Technique; or
2. Where tracks diverge from the common point
and the following aircraft is maintaining a greater
Mach Number than the preceding aircraft:
(a) At least 10 minutes longitudinal separation
exists at the point where the tracks diverge; and
(b) At least 5 minutes longitudinal separation
will exist where minimum lateral separation is
achieved (whichever is estimated to occur first);
(1) At or before the next significant point
(normally within ten degrees of longitude along
track(s)), or
(2) Within 90 minutes of the time the
following aircraft passes the common point, or
(3) Within 600 NM of the common point.
3. Apply 15 minutes between all other turbojet
aircraft.
c. Nonturbojet operations:
1. Apply 20 minutes between aircraft operating
in the West Atlantic Route System (WATRS), or
2. Apply 30 minutes between aircraft operating
outside of the WATRS.
NOTEThe
WATRS area is defined as beginning at a point
2700'N/7700'W direct to 2000'N/6700'W direct to
1800'N/6200'W direct to 1800'N/6000'W direct to
3830'N/6000'W direct to 3830'N/6915'W, thence
counterclockwise along the New York Oceanic CTA/FIR
boundary to the Miami Oceanic CTA/FIR boundary,
thence southbound along the Miami Oceanic CTA/FIR
boundary to the point of beginning.
JO 7110.65S 2/14/08
8-7-2 North Atlantic ICAO Region
8-7-4. LATERAL SEPARATION
In accordance with Chapter 8, Offshore/Oceanic
Procedures, Section 4, Lateral Separation, apply the
following:
a. 60 NM or 1 degree latitude between:
1. Supersonic aircraft operating above FL 275.
2. Aircraft which meet the MNPS and which:
NOTEThis
reduced lateral separation shall not be used if track
keeping capability of the aircraft has been reduced for any
reason.
(a) Operate within MNPS airspace; or
(b) Are in transit to or from MNPS airspace;
or
(c) Operate for part of their flight within,
above, or below MNPS airspace.
b. 90 NM or 1 and 1/2 degrees latitude between
aircraft operating:
1. Within WATRS;
2. Between the U.S., Canada, and Bermuda;
3. West of 55 West between the U.S., Canada,
or Bermuda and points in the Caribbean ICAO
Region.
c. 120 NM or 2 degrees latitude between aircraft
not covered by subparas a or b above.
NOTETracks
may be spaced with reference to their difference in
latitude, provided that in any interval of 10 degrees of
longitude the change in latitude of at least one of the tracks
does not exceed 3 degrees when operating south of
58North.
8-7-5. PROCEDURES FOR WEATHER
DEVIATIONS IN NORTH ATLANTIC (NAT)
AIRSPACE
Aircraft must request an ATC clearance to deviate.
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