NAVAIR 0%F14AAD-1
PART VI
All-Weather Operations
chapter 17 - Instnlment Procedures
Chapter IS-Extreme Weather
85 (ReverseB lat& ORIGINAL
NAVAIR Ol-F14AAD-1
CHAPTER 17
Instrument Procedures
17.1 AUTOMATIC CARRIER LANDING
SYSTEM
ACLS approachesa pply to properly configured aircraft
utilizing carrier or shore-based AN/SPN-10 or
AN/SPN-42 ACLS radar facilities. Three primary
modes of operation and two submodes are available.
1. Mode I approach automatically controlled to
touchdown
2. Mode IA approach automatically controlled to a
minimum of 200 feet and one-half mile; manual
control remainder of approach
3. Mode II approach manually controlled using
ANBPN-41 or AN/SPN-42 vertical display indicator
and/or heads-up display presentation for
glideslope and lineup information
4. Mode III approach manually controlled using
only CCA-controller-supplied information
5. Flight director approach manually controlled using
HUD flight director presentation derived from
AN/SPN42/46 information and navigation system
data for glidepath intercept and following.
17.1.1 Mode I. Mode 1 provides a fully automatic,
hands-off landing capability, called automatic carrier
landing or all-weather landing. The landing radar system
(AlVSPN-42) tracks the aircraft and compares its
position with the desired position. The aircraft position
is corrected to fly the desired glidepath by commands
t?om the naval tactical data system using the radar computer.
These commands are transmitted over the UHP
data link to the aircraft, where the automatic flight control
systeme xecutest he pitch and bank commands. Additional
ramp input commands tailored to each specific
ship or field are applied at the proper time to assist the
aircraft through the burble. In addition to control of the
aircraft, discrete words and glideslope error signals are
transmitted for cockpit displays to show the pilot where
his aircraft is in relation to the desired glideslope. Independent
glideslope error signals from the AlWSPN-41
instrument landing system may also be displayed. The
pilot may take control at any time and continue the
landing via Mode II.
17.12 Mode II. The control of the aircraft remains
with the pilot along the entire glideslope to touchdown.
Glideslope error signals are transmitted to the aircraft
for cockpit displays from the ANBPN-41 or the
AN/SPN-42. The pilot flies the aircmtl to null the error
and to keep the vertical and lateral crosshairs centered.
During a Mode II T approach, the final controller provides
a Mode III-type talkdown to assist the pilot in
flying his needles or for controller tmining.
17.1.3 Mode Ill. The pilot flies the aircraft in response
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