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Multiple Integrated Laser Engagement System
(MILES) to provide the crewmembers with a realistic
combat tactical training system that closely simulates
the effect of weapon engagements.
a. Training. During training operation, the LDS operates
as a detecting system in a MILES environment
and the operating software within the LDS does not
recognize .904 micron gallium arsenide (GaAs) MILES
laser hits as actual laser threats.
b. Tactical. During tactical operation, the LDS detects,
identifies, and characterizes three different types
of optical signals. Each sensor unit provides laser
threat detection in three different spectral bands; band
I, band II, and band III. When a sensor unit detects optical,
coherent radiation within its FOV, it provides
band and pulse characteristics as laser threat data to
the IFU. The IFU further processes this threat data,
thus comparing received signal characteristics with
stored parameters. It then determines the existence of
a laser threat, threat type, and Angle-Of-Arrival (AOA)
(quadrant resolution only). This threat data is sent as
laser threat messages to the RW digital processor for
manipulation to provide visual threat indications on
the RW display and aural voice threat messages over
the helicopter ICS. Both the visual and aural threat indications
provide threat type and relative position information
to the crewmembers.
c. Operating Procedures. Refer to para. 4.38.1.
4-78 Change 5
TM 1-1520-238-10
CHAPTER 5
OPERATING LIMITS AND RESTRICTIONS
Section I.
5.1 PURPOSE.
This chapter identifies, or refers to, all important operating
limits and restrictions that shall be observed during
ground and flight operations.
5.2 GENERAL.
The operating limitations set forth in this chapter are
the direct results of design analysis, test, and operating
experiences. Compliance with these limits will allow
the pilot to safely perform the assigned missions and to
derive maximum utility from the aircraft.
NOTE
See current Interim Statement of Airworthiness
Qualification for additional limitations/
restrictions.
GENERAL
5.3 EXCEEDED OPERATIONAL LIMITS.
Any time an operational limit is exceeded, an appropriate
entry shall be made on DA Form 2408-13-1. Entry
shall state what limit or limits were exceeded, range,
time beyond limits, and any additional data that would
aid maintenance personnel in the maintenance action
that may be required.
5.4 MINIMUM CREW REQUIREMENTS.
The minimum crew requirements for flight is two, pilot
and CPG. A technical observer may be authorized to
occupy the CPG station during ground maintenance on
a case by case basis at the discretion of the commander.
Change 2 5-1
TM 1-1520-238-10
Section II. SYSTEM LIMITS
5.5 INSTRUMENT OPERATING RANGES AND
MARKINGS.
5.5.1 Instrument Marking Color Code. Operating
limitations and ranges (fig 5-1) are illustrated by colors
on the engine, flight, and utility system instruments. RED
markings indicate the limit above or below which
continued operation is likely to cause damage or shorten
component life. GREEN markings indicate the safe or
normal range of operation. YELLOW (light or dark)
markings indicate the range when special attention
should be given to that operation covered by the
instrument. Operation is permissible in the yellow range,
but may be time limited or cautionary. Scales with
green-coded, yellow-coded, or red-coded segments
above green-coded segments operate in this manner;
the segment will light in normal progression and remain
on as the received signal level increases. Those
segments will go off in normal progression as the
received signal level decreases. Scales with red-colored
and/or yellow-coded segments below green-coded
segments operate in this manner; when the received
signal level is zero or bottom scale, the segments will
light in normal progression and will remain on. When the
first segment above
the red or yellow range goes on, all red-coded or yellowcoded
segments will go off. These segments will remain
off until the received signal level indicates a reading at or
within the red or yellow range. At that time all red-coded
or yellow-coded segments will go on and the scale
display will either go on or off in normal progression,
depending upon the received signal level. Blue colored
segments indicate that power is on.
5.5.2 Rotor Limitations. It is not abnormal to observe a
% RPM 1 and 2 speed split during autorotation descent
when the engines are fully decoupled from the
　
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