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b. Issue current touchdown RVR/RVV for the
runway(s) in use:
1. When prevailing visibility is 1 mile or less
regardless of the value indicated.
2. When RVR/RVV indicates a reportable value
regardless of the prevailing visibility.
NOTEReportable
values are: RVR 6,000 feet or less; RVV 1-1/2
miles or less.
3. When it is determined from a reliable source
that the indicated RVR value differs by more than 400
feet from the actual conditions within the area of the
transmissometer, the RVR data is not acceptable and
shall not be reported.
NOTEA
reliable source is considered to be a certified weather
observer, air traffic controller, or pilot.
4. When the observer has reliable reports, or has
otherwise determined that the instrument values are
not representative of the associated runway, the data
shall not be used.
11-1-20. RVR/RVV
a. Provide RVR/RVV information by stating the
runway, the abbreviations RVR/RVV, and the
indicated value. When issued along with other
weather elements, transmit these values in the normal
sequence used for weather reporting.
b. When there is a requirement to issue an
RVR/RVV value and a visibility condition greater or
less than the reportable values of the equipment is
indicated, state the condition as MORE than or LESS
than the appropriate minimum or maximum readable
value.
c. When a readout indicates a rapidly varying
visibility condition (1,000 feet or more for RVR; one
or more reportable values for RVV), report the current
value followed by the range of visibility variance.
11-1-21. OPERATION OF LANDING
DIRECTION INDICATOR
Align the landing direction indicator with the favored
or designated runway.
2/14/08 JO 7110.10T
General 12-1-1
Chapter 12. Interphone Communications
Section 1. General
12-1-1. PURPOSE
a. The procedures and phraseologies contained in
this chapter apply to interfacility and intrafacility
telephone communications conducted from any
position of operation.
b. Interphone use is restricted to authorized
official business only.
c. Monitor interphones continuously. At facilities
without ringers keep speaker volume at a level
sufficient to hear all transmissions. In the event of
interphone failure, use authorized back-up procedures;
i.e., commercial telephone, aircraft radio relay.
d. Use the words or phrases in interphone
communications as contained in the Pilot/Controller
Glossary.
12-1-2. INTERPHONE TRANSMISSION
PRIORITIES
Give priority to interphone transmissions as follows:
a. First priority. Emergency messages including
essential information on aircraft accidents or
suspected accidents. After actual emergency has
passed, give a lower priority to messages relating to
an accident.
b. Second priority. Clearance and control instructions.
c. Third priority. Movement and control messages
using the following order of precedence when
possible:
1. Progress reports.
2. Departure or arrival reports.
3. Flight plans.
d. Fourth priority. Movement messages on VFR
aircraft.
e. Fifth priority. General messages; e.g., outages.
12-1-3. PRIORITY INTERRUPTION
The words “break for emergency” or “break for
control” may be used to interrupt lower priority
messages when it is necessary to transmit an
emergency or control message.
12-1-4. MESSAGE INITIATION
Initiate interphone messages as follows:
a. Assure line is not in use.
PHRASEOLOGYLINE
CLEAR?
b. If line is not in use, establish contact with the
desired facility and/or position.
EXAMPLEManual
signaling:
FSS-(Signals center manually).
Center- “Anchorage Center” or “Sector D-5.”
FSS- “Kenai radio. Kenai progress Apache One Two
Three.”
Center- “Go ahead”
FSS- “Over Kenai...etc.” “L-H”
Center- “Roger Apache One Two Three.” “C-M”
Voice signaling:
FSS- “Seattle Center, McMinnville Radio, Clearance
Request.“
Center “Seattle Center, Go Ahead.”
FSS- “Request Clearance, Army ......etc.”
c. When initiating calls on interphone voice lines,
identify the line on which the call is being made.
EXAMPLEFSS
- “Indianapolis Center, Dayton Radio on the 82 line,
departure.”
d. When calling or replying on an interphone line
which connects only two facilities, you may omit the
facility's name.
EXAMPLE-
“Radio, inbound estimate.”
　
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