TM55-1500-345-23
Section Xl. MARKING OF INSTRUMENTS
indicate to the pilot, at a glance, that flight operation is
GENERAL.
being accomplished in a safe, desirable, or unsafe
region. Generally speaking the instrument marking
a. This Section provides the general method of
system consists of four colors and intermediate blank
marking aircraft instruments, the interpretation of these
spaces as illustrated in the fictitious instrument in figure
markings, and specific instructions for the application
of the markings.
d. INDEX MARK.
NOTE
The index mark is used to indicate any move-
This Section is the subject of International
ment between the glass and the case and thus reveal
Standardization Agreement STANAG No.
any errors in the location of the markers by such move-
3436.
ment.
b. ACTUAL MARKINGS AND FUEL GRADE FOR
e. Deleted.
SPECIFIC AIRCRAFT.
The actual markings for specific aircraft and the
fuel grade to which any set of markings apply may be
determined by reference to the instrument markings
presented in the -10 Operator's Manual for the aircraft
involved.
f.
MIXTURE CONTROL
QUADRANT
MARKINGS.
c. INTERPRETATION OF THE RANGE
These markings are used to identify the automatic
MARKINGS.
lean and automatic rich positions on the control
The instrument range markings are designed to
quadrant.
