Avionics News - October 2023 - 48

ser ies
BY THOMAS INMAN
Part 1
Autonomous
Navigation
Systems
T
his next series of stories will be useful
to those interested in earning the
NCATT autonomous navigation systems
endorsement to the aircraft
electronics technician certificate
from ASTM International. Both
inertial navigation systems and
inertial reference systems allow
a flight crew to navigate without
being dependent on any received
navigation signal. For purposes of
this series of stories, INS and IRS
will be treated the same, since in
essence, they do the same thing.
The minor difference is because
the INS is designed as a navigation
system, which is accurate enough
to show air data and attitude. On
the other hand, the IRS is designed
as an instrumentation system (air
data and attitude) accurate enough
to provide navigation. Essentially, these systems are
two sides of the same coin.
To prepare for the ANS endorsement exam, one must
48 AVIONICS NEWS * OCTOBER 2023
TO PREPARE FOR THE ANS
ENDORSEMENT EXAM,
ONE MUST REVIEW BASIC
INSTRUMENTATION AND
NAVIGATION THEORY.
PASSING THE TEST WILL
REQUIRE THE TECHNICIAN
TO GET A BASIC
review basic instrumentation and navigation theory.
Passing the test will require the technician to get a basic
understanding of both legacy instruments and modern
instruments. As a result, we will
review everything from a simple
wet compass to a microelectronic
moving mass sensor.
UNDERSTANDING OF BOTH
LEGACY INSTRUMENTS AND
MODERN INSTRUMENTS.
An autonomous navigation system
is an extremely accurate system
of deduced reckoning. Whether or
not we are pilots, we use deduced
reckoning quite often. For example,
while traveling along the expressway,
I see a sign indicating that I am 70
miles from home. At a speed of 70
miles an hour, I will be home in
approximately one hour. Pilots learn
to calculate with more accuracy by
taking winds into account along with
the direction the aircraft is pointed and
the direction the aircraft is moving.
The autonomous navigation system will be accurate
enough to make these calculations in three dimensions
over both long and short distances. For example, as a jet

Avionics News - October 2023

Table of Contents for the Digital Edition of Avionics News - October 2023

Contents
Avionics News - October 2023 - Intro
Avionics News - October 2023 - Cover1
Avionics News - October 2023 - Cover2
Avionics News - October 2023 - 1
Avionics News - October 2023 - Contents
Avionics News - October 2023 - 3
Avionics News - October 2023 - 4
Avionics News - October 2023 - 5
Avionics News - October 2023 - 6
Avionics News - October 2023 - 7
Avionics News - October 2023 - 8
Avionics News - October 2023 - 9
Avionics News - October 2023 - 10
Avionics News - October 2023 - 11
Avionics News - October 2023 - 12
Avionics News - October 2023 - 13
Avionics News - October 2023 - 14
Avionics News - October 2023 - 15
Avionics News - October 2023 - 16
Avionics News - October 2023 - 17
Avionics News - October 2023 - 18
Avionics News - October 2023 - 19
Avionics News - October 2023 - 20
Avionics News - October 2023 - 21
Avionics News - October 2023 - 22
Avionics News - October 2023 - 23
Avionics News - October 2023 - 24
Avionics News - October 2023 - 25
Avionics News - October 2023 - 26
Avionics News - October 2023 - 27
Avionics News - October 2023 - 28
Avionics News - October 2023 - 29
Avionics News - October 2023 - 30
Avionics News - October 2023 - 31
Avionics News - October 2023 - 32
Avionics News - October 2023 - 33
Avionics News - October 2023 - 34
Avionics News - October 2023 - 35
Avionics News - October 2023 - 36
Avionics News - October 2023 - 37
Avionics News - October 2023 - 38
Avionics News - October 2023 - 39
Avionics News - October 2023 - 40
Avionics News - October 2023 - 41
Avionics News - October 2023 - 42
Avionics News - October 2023 - 43
Avionics News - October 2023 - 44
Avionics News - October 2023 - 45
Avionics News - October 2023 - 46
Avionics News - October 2023 - 47
Avionics News - October 2023 - 48
Avionics News - October 2023 - 49
Avionics News - October 2023 - 50
Avionics News - October 2023 - 51
Avionics News - October 2023 - 52
Avionics News - October 2023 - 53
Avionics News - October 2023 - 54
Avionics News - October 2023 - 55
Avionics News - October 2023 - 56
Avionics News - October 2023 - 57
Avionics News - October 2023 - 58
Avionics News - October 2023 - 59
Avionics News - October 2023 - 60
Avionics News - October 2023 - 61
Avionics News - October 2023 - 62
Avionics News - October 2023 - 63
Avionics News - October 2023 - 64
Avionics News - October 2023 - Cover3
Avionics News - October 2023 - Cover4
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