Avionics News August 2015 - 45

Even though many of those systems lack the official nod of
INFRARED, MICROWAVE AND MORE
the FAA for using lower minima on some approaches, pilots
One reason the FAA made 91 .1 75 ( 1 ) a performance-based
and aircraft owners of a wide range embrace the technology
rule stems from the variety of technologies available to deliver
for other, more-freq uent, eq ually tangible benefits: the ability
an enhanced image of the world outside the aircraft.
to see in the dark; a view through some atmospheric obstrucInfrared-imaging sensors dominate civil-aviation applications
tions; and increased pilot' s " sight" in some daytime obscura
obscura- small, installed cameras sensitive only to a specific range of
tion, as well.
light in the infrared spectrum. Older and some more-sophis
more-sophisThe latest changes to FAA policy and regulations on the
ticated systems use cooled sensors designed to see and detect
subj ect of EV S sets the performance-based standards for senlonger wave-length IR photons; these tend to be both heavier
sors - and conditions under which pilots can descend that last
and more ex pensive - in addition to the ex tra complex ity of the
1 00 feet using the EV S image on a
cooling hardware.
heads-up display.
U ncooled systems can work in both
These systems must be installed and
long- and short-wave-length IR light,
approved in accordance with EFV S
while tending to be smaller, lighter and
AFTER YEARS OF
req uirements of 1 4 CFR ยง 91 .1 75 ( l) .
less ex pensive - but with more limits
AVAILABILITY TO
Advisory Circular 90-EFV S spells out
on their ability to see through obscura
obscurathe operational guidance for EFV S -
tions.
MILITARY AND PART
or, as the FAA calls it, enhanced flight
Other technologies capable of propro
25 CIVILIAN AIRCRAFT
vision systems.
viding the same benefits - a view in the
OPERATORS, ENHANCED
ENHANCEDU nder 91 .1 75 ( 1 ) , cockpit displays
dark or through obscurations - include
IMAGING TECHNOLOGY
aren' t yet allowed, though authorities
millimeter-wave radar, capable of proCONTINUES
TO
SPREAD.
in Europe and elsewhere take a difducing similarly clear, sharp images in
ferent view, if you will. Those other
the dark and low-visibility conditions.
FROM BUSINESSplaces grant lower-minimum credit
Then there' s today' s popular synsyn
TURBINE AIRCRAFT, THE
for EV S displayed on a cockpit screen
thetic vision system technology; helpful
TECHNOLOGY TRICKLED
closely aligned with the pilot' s linein its own way - but nowhere near the
DOWN TO PART 23
of-sight line out the windshield - the
same. SV S sees only what is propro
view through a H U D .
gramed into its database.
AIRCRAFT.
Canadian and European regulators
One unheralded ex ample of EV S
and many within the aviation comarose during a couple of demonstrademonstra
munity believe EV S information can
tions of integrated avionics packages
be safely displayed on head down displays, particularly when
that included EV S sensors. The sensors' heat-sensitive capabilicapabili
there are two crewmen in the cockpit.
ties made more visible pattern traffic at a business airport on a
Avionics makers seem optimistic that the FAA will, in
haz y day.
time, accept that U .S. operators can safely use EV S to lower
The traffic first appeared as icons on the primary flight and
minima when the display closely aligns with the pilot' s sightthe multifunction displays, then on the EV S portion of the
line on approach.
M FD . The small white dots on the horiz on moved rapidly and
M eanwhile, for other systems, AC 20-1 6 7A provides instalhoriz ontally across our field of view.
lation and operational guidance. For the hardcore IFR user
This surprised the demonstration pilot when a guest pilot
with the need and budget, a system that allows landings in the
called out traffic about 5 miles ahead - 25 , 30 seconds before
clag offers some significant operational flex ibility otherwise
either of the pilots visually acq uired the target aircraft. By then
unavailable.
multiple hot spots populated the monochrome image insert on
For the rest of general aviation, however, even systems
the aircraft' s M FD .
installed outside the parameters of 91 .1 75 ( 1 ) offer multiple
benefits.
Continued on following page
AVIONICS NEWS

*

AUGUST

2015

4 5



Table of Contents for the Digital Edition of Avionics News August 2015

Avionics News August 2015 - Intro
Avionics News August 2015 - Cover1
Avionics News August 2015 - Cover2
Avionics News August 2015 - 1
Avionics News August 2015 - 2
Avionics News August 2015 - 3
Avionics News August 2015 - 4
Avionics News August 2015 - 5
Avionics News August 2015 - 6
Avionics News August 2015 - 7
Avionics News August 2015 - 8
Avionics News August 2015 - 9
Avionics News August 2015 - 10
Avionics News August 2015 - 11
Avionics News August 2015 - 12
Avionics News August 2015 - 13
Avionics News August 2015 - 14
Avionics News August 2015 - 15
Avionics News August 2015 - 16
Avionics News August 2015 - 17
Avionics News August 2015 - 18
Avionics News August 2015 - 19
Avionics News August 2015 - 20
Avionics News August 2015 - 21
Avionics News August 2015 - 22
Avionics News August 2015 - 23
Avionics News August 2015 - 24
Avionics News August 2015 - 25
Avionics News August 2015 - 26
Avionics News August 2015 - 27
Avionics News August 2015 - 28
Avionics News August 2015 - 29
Avionics News August 2015 - 30
Avionics News August 2015 - 31
Avionics News August 2015 - 32
Avionics News August 2015 - 33
Avionics News August 2015 - 34
Avionics News August 2015 - 35
Avionics News August 2015 - 36
Avionics News August 2015 - 37
Avionics News August 2015 - 38
Avionics News August 2015 - 39
Avionics News August 2015 - 40
Avionics News August 2015 - 41
Avionics News August 2015 - 42
Avionics News August 2015 - 43
Avionics News August 2015 - 44
Avionics News August 2015 - 45
Avionics News August 2015 - 46
Avionics News August 2015 - 47
Avionics News August 2015 - 48
Avionics News August 2015 - 49
Avionics News August 2015 - 50
Avionics News August 2015 - 51
Avionics News August 2015 - 52
Avionics News August 2015 - 53
Avionics News August 2015 - 54
Avionics News August 2015 - 55
Avionics News August 2015 - 56
Avionics News August 2015 - 57
Avionics News August 2015 - 58
Avionics News August 2015 - 59
Avionics News August 2015 - 60
Avionics News August 2015 - 61
Avionics News August 2015 - 62
Avionics News August 2015 - 63
Avionics News August 2015 - 64
Avionics News August 2015 - 65
Avionics News August 2015 - 66
Avionics News August 2015 - 67
Avionics News August 2015 - 68
Avionics News August 2015 - 69
Avionics News August 2015 - 70
Avionics News August 2015 - 71
Avionics News August 2015 - 72
Avionics News August 2015 - Cover3
Avionics News August 2015 - Cover4
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