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Avoidance System (TCAS), if equipped.
10.4.5.4 Turn on aircraft exterior lights.
10.4.5.5 Deviations of less than 10 NM or operations
within COMPOSITE (NOPAC and CEPAC) Air‐
30 AUG 07
AIP
United States of America
GEN 3.5-32
15 MAR 07
Nineteenth Edition Federal Aviation Administration
space, should REMAIN at ASSIGNED altitude.
Otherwise, when the aircraft is approximately 10 NM
from track, initiate an altitude change based upon the
following criteria:
TBL GEN 3.5-4
Route
Centerline/Track
Deviations
>10 NM
Altitude Change
East
000 - 179M
Left
Right
Descend 300 Feet
Climb 300 Feet
West
180-359M
Left
Right
Climb 300 Feet
Descend 300 Feet
Pilot Memory Slogan: “East right up,
West right down.”
10.4.5.6 When returning to track, be at the assigned
flight level when the aircraft is within approximately
10 NM of centerline.
10.4.5.7 If contact was not established prior to
deviating, continue to attempt to contact ATC to
obtain a clearance. If contact was established,
continue to keep ATC advised of intentions and
obtain essential traffic information.
11. Notifications Required From Operators
11.1 Preflight briefing and flight documentation
services provided by AFSSs do not require prior
notification.
11.2 Preflight briefing and flight documentation
services provided by a National Weather Service
Office (or contract office) are available upon request
for long-range international flights for which
meteorological data packages are prepared for the
pilot-in-command. Briefing times should be coordinated
between the local representative and the local
meteorological office.
11.3 Flight Service Stations do not normally have the
capability to prepare meteorological data packages
for a preflight briefing.
12. Weather Observing Systems and
Operating Procedures
For surface wind readings, most meteorological
reporting stations have a direct reading, 3-cup
anemometer wind system for which a 1-minute mean
wind speed and direction (based on true north) is
taken. Some stations also have a continuous wind
speed recorder which is used in determining the
gustiness of the wind.
13. Runway Visual Range (RVR)
There are currently two configurations of the RVR,
commonly identified as Taskers and New Generation
RVR. The Taskers use transmissometer technology.
The New Generation RVRs use forward scatter
technology and are currently being deployed to
replace the existing Taskers.
13.1 RVR values are measured by transmissometers
mounted on 14-foot towers along the runway. A full
RVR system consists of:
13.1.1 A transmissometer projector and related
items.
13.1.2 A transmissometer receiver (detector) and
related items.
13.1.3 An analogue recorder.
13.1.4 A signal data converter and related items.
13.1.5 A remote digital or remote display programmer.
13.2 The transmissometer projector and receiver are
mounted on towers 250 feet apart. A known intensity
of light is emitted from the projector and is measured
by the receiver. Any obscuring matter, such as rain,
snow, dust, fog, haze, or smoke, reduces the light
intensity arriving at the receiver. The resultant
intensity measurement is then converted to an RVR
value by the signal data converter. These values are
displayed by readout equipment in the associated air
traffic facility and updated approximately once every
minute for controller issuance to pilots.
13.3 The signal data converter receives information
on the high-intensity runway edge light setting in use
(step 3, 4, or 5), transmission values from the
transmissometer, and the sensing of day or night
conditions. From the three data sources, the system
will compute appropriate RVR values.
13.4 An RVR transmissometer established on a
250-foot baseline provides digital readouts to a
minimum of 600 feet, which are displayed in
200-foot increments to 3,000 feet, and in 500-foot
increments from 3,000 feet to a maximum value of
6,000 feet.
13.5 RVR values for Category IIIa operations extend
down to 700-foot RVR; however, only 600 and
800feet are reportable RVR increments. The
800RVR reportable value covers a range of 701 feet
to 900 feet and is therefore a valid minimum
indication of Category IIIa operations.
30 AUG 07
AIP
United States of America
GEN 3.5-33
15 MAR 07
Federal Aviation Administration Nineteenth Edition
13.6 Approach categories with the corresponding
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