Avionics News September 2014 - 46

AUTONOMOUS NAVIGATION SYSTEMS
AET ENDORSEMENT
Continued from page 45

As one would expect, those
studying for the ANS endorsement
exam will need to learn about IRS
and INS. Again, the knowledge here
is transferable. Essentially, INS and
IRS do the same things. For example,
engineers will design an INS with
navigation in mind, but the nature of
the system allows it to monitor and
display aircraft attitude. Conversely,
an IRS system is engineered with
attitude in mind, but also the system
will be accurate enough to navigate.
So in many ways, what the technician
learns about one, he or she can apply
to the other.
Those preparing for the ANS
endorsement exam must know

Those studying for the ANS endorsement exam should become
familiar with the purpose, types, components and configurations of
this common form of direction indicating system.

some details about how IRS and
INS systems align and calibrate.
How long do you need to remain
stationary, and why? Furthermore,
the technician should understand
how to enter data and what
components comprise the systems.
These systems monitor themselves,
so the technician should learn how.
An IRS- or INS-equipped aircraft
will take system integration to
an extreme level. Everything
seems to be connected. For this
reason, consider earning the DNS

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46

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september

2014

Sales & Service

endorsement before earning the
ANS endorsement. For the ANS,
the technician must be familiar with
global navigation satellite systems,
flight management systems, various
types of displays and auto flight
systems.
Finally, those preparing for the
ANS endorsement exam must have
a good idea of troubleshooting
techniques and how to avoid
problems. Essentially, the standard
divides operational checks and
fault isolation into preinstallation
requirements, installation
requirements, post installation
testing and troubleshooting.
In years past, ANS was the
domain exclusively of the heavy
iron. The gyro platforms and power
requirements were large. Now,
thanks to large scale integrators,
MEMS and magnetometers, most
of the same capabilities can fit into
a package the size of a fist, which
draws mere milliamps. Whether you
work with large jets or small piston
aircraft, this knowledge and the
endorsement is valuable.
Finally, please remember that all
endorsement exams are free to those
attending the three AEA Regional
Meetings in the U.S., courtesy of
the AEA Educational Foundation. A
complete list of dates and locations
is available online at www.aea.
net. For more information about
NCATT, the AET certification and its
endorsements, visit www.ncatt.org. q
http://www.aea.net http://www.avionics411.com http://www.aea.net http://www.ncatt.org
Avionics News September 2014

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