Flight Training - November 2014 - 15

HOW IT WORKS

BY IAN J. TWOMBLY

WAAS

Taking GPS to the next level
THE ADVENT OF GPS has completely changed the way we fly.
It makes point-to-point navigation virtually idiot-proof and
enables an incredible amount of situational awareness. How can
something that's so revolutionary be made even better? With
WAAS, the wide-area augmentation system.
WAAS is a system that improves the accuracy of GPS signals.
As you know, GPS is a system of satellites that communicate their locations to the device installed in your aircraft or
contained within your portable receiver, which then uses that
information to calculate your position. Without WAAS, that
signal is accurate to within anywhere from five to 15 meters-a
major leap forward from ground-based radio navigation.
WAAS
communicating
satellite

By sending the GPS position signal through a series of ground
stations and then back up to dedicated satellites before releasing it to your unit, WAAS greatly improves the standard GPS
position information. In fact, a WAAS-equipped GPS has been
tested to an accuracy of less than a meter.
Such an accurate signal may not matter for most VFR pilots,
but it represents the opportunity for instrument pilots to make
approaches to within 200 feet of the ground without visual
contact.
The system requires no fees, no subscription, and no action on
the part of the user. Simply turn on your WAAS-capable device; it
will connect and zero in on your position automatically.
GPS

WAAS
APPROACHES
The FAA has developed a
number of different types
of WAAS approaches.
One runway may have
the option of an approach
with only lateral guidance,
one with both lateral
and vertical guidance,
and one with something
called LPV, or localizer
performance with vertical
guidance. These LPV
minimums approximate
precision approach
capabilities.

Master
station

ART NOT FINAL

Wide area
reference
station

STEVE KARP

A FUTURE WITH WAAS
WAAS is a key element of Automatic Dependent Surveillance-Broadcast (ADS-B), the backbone of the FAA's future air traffic control
system. Using ADS-B, airplanes transmit their WAAS-enhanced positions to air traffic control, which eventually will use it to replace
traditional long-range radar capabilities. Some owners are already equipping their aircraft with this technology, which, beginning
January 1, 2020, will be required for operations in most airspace where a transponder is required today.

NOVEMBER 2014 FLIGHT TRAINING

/ 15



Flight Training - November 2014

Table of Contents for the Digital Edition of Flight Training - November 2014

Contents
Flight Training - November 2014 - Cover1
Flight Training - November 2014 - Cover2
Flight Training - November 2014 - Contents
Flight Training - November 2014 - 2
Flight Training - November 2014 - 3
Flight Training - November 2014 - 4
Flight Training - November 2014 - 5
Flight Training - November 2014 - 6
Flight Training - November 2014 - 7
Flight Training - November 2014 - 8
Flight Training - November 2014 - 9
Flight Training - November 2014 - 10
Flight Training - November 2014 - 11
Flight Training - November 2014 - 12
Flight Training - November 2014 - 13
Flight Training - November 2014 - 14
Flight Training - November 2014 - 15
Flight Training - November 2014 - 16
Flight Training - November 2014 - 17
Flight Training - November 2014 - 18
Flight Training - November 2014 - 19
Flight Training - November 2014 - 20
Flight Training - November 2014 - 21
Flight Training - November 2014 - 22
Flight Training - November 2014 - 23
Flight Training - November 2014 - 24
Flight Training - November 2014 - 25
Flight Training - November 2014 - 26
Flight Training - November 2014 - 27
Flight Training - November 2014 - 28
Flight Training - November 2014 - 29
Flight Training - November 2014 - 30
Flight Training - November 2014 - 31
Flight Training - November 2014 - 32
Flight Training - November 2014 - 33
Flight Training - November 2014 - 34
Flight Training - November 2014 - 35
Flight Training - November 2014 - 36
Flight Training - November 2014 - 37
Flight Training - November 2014 - 38
Flight Training - November 2014 - 39
Flight Training - November 2014 - 40
Flight Training - November 2014 - 41
Flight Training - November 2014 - 42
Flight Training - November 2014 - 43
Flight Training - November 2014 - 44
Flight Training - November 2014 - 45
Flight Training - November 2014 - 46
Flight Training - November 2014 - 47
Flight Training - November 2014 - 48
Flight Training - November 2014 - 49
Flight Training - November 2014 - 50
Flight Training - November 2014 - 51
Flight Training - November 2014 - 52
Flight Training - November 2014 - 53
Flight Training - November 2014 - 54
Flight Training - November 2014 - 55
Flight Training - November 2014 - 56
Flight Training - November 2014 - Cover3
Flight Training - November 2014 - Cover4
https://www.nxtbook.com/nxtbooks/aopa/ft_202107
https://www.nxtbook.com/nxtbooks/aopa/ft_202106
https://www.nxtbook.com/nxtbooks/aopa/ft_202104
https://www.nxtbook.com/nxtbooks/aopa/ft_202105
https://www.nxtbook.com/nxtbooks/aopa/ft_202103
https://www.nxtbook.com/nxtbooks/aopa/ft_202101
https://www.nxtbook.com/nxtbooks/aopa/ft_202011
https://www.nxtbook.com/nxtbooks/aopa/ft_202009
https://www.nxtbook.com/nxtbooks/aopa/ft_202008
https://www.nxtbook.com/nxtbooks/aopa/ft_202007
https://www.nxtbook.com/nxtbooks/aopa/ft_202006
https://www.nxtbook.com/nxtbooks/aopa/ft_202005
https://www.nxtbook.com/nxtbooks/aopa/ft_202004
https://www.nxtbook.com/nxtbooks/aopa/ft_202003
https://www.nxtbook.com/nxtbooks/aopa/ft_202001
https://www.nxtbook.com/nxtbooks/aopa/ft_201912
https://www.nxtbook.com/nxtbooks/aopa/ft_201911
https://www.nxtbook.com/nxtbooks/aopa/ft_201910
https://www.nxtbook.com/nxtbooks/aopa/ft_201909
https://www.nxtbook.com/nxtbooks/aopa/ft_201908
https://www.nxtbook.com/nxtbooks/aopa/ft_201907
https://www.nxtbook.com/nxtbooks/aopa/ft_201906
https://www.nxtbook.com/nxtbooks/aopa/ft_201905
https://www.nxtbook.com/nxtbooks/aopa/ft_201904
https://www.nxtbook.com/nxtbooks/aopa/ft_201903
https://www.nxtbook.com/nxtbooks/aopa/ft_201902
https://www.nxtbook.com/nxtbooks/aopa/ft_201901
https://www.nxtbook.com/nxtbooks/aopa/ft_201812
https://www.nxtbook.com/nxtbooks/aopa/ft_201811
https://www.nxtbook.com/nxtbooks/aopa/ft_201810
https://www.nxtbook.com/nxtbooks/aopa/ft_201809
https://www.nxtbook.com/nxtbooks/aopa/ft_201808
https://www.nxtbook.com/nxtbooks/aopa/ft_201807
https://www.nxtbook.com/nxtbooks/aopa/ft_201806
https://www.nxtbook.com/nxtbooks/aopa/ft_201805
https://www.nxtbook.com/nxtbooks/aopa/ft_201804
https://www.nxtbook.com/nxtbooks/aopa/ft_201803
https://www.nxtbook.com/nxtbooks/aopa/ft_201802
https://www.nxtbook.com/nxtbooks/aopa/ft_201801
https://www.nxtbook.com/nxtbooks/aopa/ft_201712
https://www.nxtbook.com/nxtbooks/aopa/ft_201711
https://www.nxtbook.com/nxtbooks/aopa/ft_201710
https://www.nxtbook.com/nxtbooks/aopa/ft_201709
https://www.nxtbook.com/nxtbooks/aopa/ft_201708
https://www.nxtbook.com/nxtbooks/aopa/ft_201707
https://www.nxtbook.com/nxtbooks/aopa/ft_201706
https://www.nxtbook.com/nxtbooks/aopa/ft_201705
https://www.nxtbook.com/nxtbooks/aopa/ft_201704
https://www.nxtbook.com/nxtbooks/aopa/ft_201703
https://www.nxtbook.com/nxtbooks/aopa/ft_201702
https://www.nxtbook.com/nxtbooks/aopa/ft_201701
https://www.nxtbook.com/nxtbooks/aopa/ft_201612
https://www.nxtbook.com/nxtbooks/aopa/ft_201611
https://www.nxtbook.com/nxtbooks/aopa/ft_201610
https://www.nxtbook.com/nxtbooks/aopa/ft_201609
https://www.nxtbook.com/nxtbooks/aopa/ft_201608
https://www.nxtbook.com/nxtbooks/aopa/ft_201607
https://www.nxtbook.com/nxtbooks/aopa/ft_201606
https://www.nxtbook.com/nxtbooks/aopa/ft_201605
https://www.nxtbook.com/nxtbooks/aopa/ft_201604
https://www.nxtbook.com/nxtbooks/aopa/ft_201603
https://www.nxtbook.com/nxtbooks/aopa/ft_201602
https://www.nxtbook.com/nxtbooks/aopa/ft_201601
https://www.nxtbook.com/nxtbooks/aopa/ft_201512
https://www.nxtbook.com/nxtbooks/aopa/ft_201511
https://www.nxtbook.com/nxtbooks/aopa/ft_201510
https://www.nxtbook.com/nxtbooks/aopa/ft_201509
https://www.nxtbook.com/nxtbooks/aopa/ft_201508
https://www.nxtbook.com/nxtbooks/aopa/ft_201507
https://www.nxtbook.com/nxtbooks/aopa/ft_201506
https://www.nxtbook.com/nxtbooks/aopa/ft_201505
https://www.nxtbook.com/nxtbooks/aopa/ft_201504
https://www.nxtbook.com/nxtbooks/aopa/ft_201503
https://www.nxtbook.com/nxtbooks/aopa/ft_201502
https://www.nxtbook.com/nxtbooks/aopa/ft_201501
https://www.nxtbook.com/nxtbooks/aopa/ft_201412
https://www.nxtbook.com/nxtbooks/aopa/ft_201411
https://www.nxtbook.com/nxtbooks/aopa/ft_201410
https://www.nxtbook.com/nxtbooks/aopa/ft_201409
https://www.nxtbook.com/nxtbooks/aopa/ft_201408
https://www.nxtbook.com/nxtbooks/aopa/ft_201407
https://www.nxtbook.com/nxtbooks/aopa/ft_201406
https://www.nxtbook.com/nxtbooks/aopa/ft_201405
https://www.nxtbook.com/nxtbooks/aopa/ft_201404
https://www.nxtbook.com/nxtbooks/aopa/ft_201403
https://www.nxtbook.com/nxtbooks/aopa/ft_201402
https://www.nxtbook.com/nxtbooks/aopa/ft_201401
https://www.nxtbook.com/nxtbooks/aopa/ft_201312
https://www.nxtbook.com/nxtbooks/aopa/ft_201311
https://www.nxtbook.com/nxtbooks/aopa/ft_201310
https://www.nxtbook.com/nxtbooks/aopa/ft_201309
https://www.nxtbook.com/nxtbooks/aopa/ft_201308
https://www.nxtbook.com/nxtbooks/aopa/ft_201307
https://www.nxtbook.com/nxtbooks/aopa/ft_201306
https://www.nxtbook.com/nxtbooks/aopa/ft_201305
https://www.nxtbook.com/nxtbooks/aopa/ft_201304
https://www.nxtbook.com/nxtbooks/aopa/ft_201303
https://www.nxtbook.com/nxtbooks/aopa/ft_201302
https://www.nxtbook.com/nxtbooks/aopa/ft_201301
https://www.nxtbook.com/nxtbooks/aopa/ft_201212
https://www.nxtbook.com/nxtbooks/aopa/ft_201211
https://www.nxtbook.com/nxtbooks/aopa/ft_201210
https://www.nxtbook.com/nxtbooks/aopa/ft_201209
https://www.nxtbook.com/nxtbooks/aopa/ft_201208
https://www.nxtbook.com/nxtbooks/aopa/ft_201207
https://www.nxtbook.com/nxtbooks/aopa/ft_201206
https://www.nxtbook.com/nxtbooks/aopa/ft_201205
https://www.nxtbook.com/nxtbooks/aopa/ft_201204
https://www.nxtbook.com/nxtbooks/aopa/ft_201203
https://www.nxtbook.com/nxtbooks/aopa/ft_201202
https://www.nxtbook.com/nxtbooks/aopa/ft_201201
https://www.nxtbook.com/nxtbooks/aopa/ft_201112
https://www.nxtbook.com/nxtbooks/aopa/ft_201111
https://www.nxtbook.com/nxtbooks/aopa/ft_201110
https://www.nxtbook.com/nxtbooks/aopa/ft_201109
https://www.nxtbook.com/nxtbooks/aopa/ft_201108
https://www.nxtbook.com/nxtbooks/aopa/ft_201107
https://www.nxtbook.com/nxtbooks/aopa/ft_201106
https://www.nxtbook.com/nxtbooks/aopa/ft_201105
https://www.nxtbook.com/nxtbooks/aopa/ft_201104
https://www.nxtbook.com/nxtbooks/aopa/ft_201103
https://www.nxtbookmedia.com