Sandel ST3400H HeliTAWS Manual

ST3400H
Helicopter
Terrain Awareness
Warning System
Pilot’s Guide
Revision B1

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TABLE OF CONTENTS
1INTRODUCTION ..............................................................................1-1
1.1 Pilot Information........................................................................1-1
1.2 Copyright...................................................................................1-1
1.3 Revision Notice..........................................................................1-1
1.4 Operational and Legal Issues.....................................................1-2
1.5 Trademarks ................................................................................1-2
1.6 Approvals...................................................................................1-2
1.7 Conventions Used In This Manual.............................................1-3
1.8 Effectivity, Revision History And Errata...................................1-3
2LIMITATIONS...................................................................................2-1
3WELCOME TO THE ST3400H HELITAWS.................................3-1
3.1 Description.................................................................................3-1
3.2 What it is....................................................................................3-1
3.3 What it isn’t................................................................................3-2
3.4 What it does ...............................................................................3-2
3.5 Other Features............................................................................3-3
4SYSTEM OVERVIEW......................................................................4-1
4.1 “Design Cruise Altitude”...........................................................4-1
4.1.1 Sensitivity...............................................................................4-1
4.2 Off Airport Landings .................................................................4-1
4.3 Alerts, Warnings and Cautions ..................................................4-1
4.4 TAWS Inhibit.............................................................................4-2
4.5 Display.......................................................................................4-2
4.5.1 Topographic Display..............................................................4-2
4.5.2 Relative Altitude Display.......................................................4-2
4.5.3 Obstacle Display.....................................................................4-2
4.5.4 Flight Plans.............................................................................4-3
4.5.5 Airports and Runways............................................................4-3
4.5.6 Radar Altimeter Display.........................................................4-3
4.5.7 Traffic.....................................................................................4-3
4.5.8 NVIS.......................................................................................4-3
4.6 Sensors.......................................................................................4-4
4.7 Database.....................................................................................4-4
4.7.1 Coverage area of the database................................................4-4
4.7.2 Database updates....................................................................4-4
5TERRAIN DISPLAY AND OPERATION.......................................5-1
5.1 Control Overview.......................................................................5-1
5.2 Display Overview ......................................................................5-2
5.3 Splash Screen.............................................................................5-3
5.4 Initial Bootup Display................................................................5-3

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5.5 No-Sensor Display.....................................................................5-4
5.6 FULL / ARC..............................................................................5-5
5.7 REL/TOPO ................................................................................5-6
5.7.1 TOPO DETAILS....................................................................5-6
5.7.2 REL DETAILS.......................................................................5-6
5.8 REL Color Banding ...................................................................5-7
5.9 Display Orientation....................................................................5-7
5.10 Display Range............................................................................5-9
5.11 Overlay.....................................................................................5-10
5.12 Heading Pointer .......................................................................5-11
5.13 Sensitivity ................................................................................5-12
5.14 Off Airport Mode.....................................................................5-13
5.15 Mute.........................................................................................5-14
5.16 Brightness ................................................................................5-15
5.17 Flight Plan................................................................................5-16
6TERRAIN AND OBSTACLE ALERTING .....................................6-1
6.1 Alert Generation.........................................................................6-1
6.2 Alert Display..............................................................................6-3
6.3 External Annunciation ...............................................................6-3
6.4 Responding to an Alert ..............................................................6-3
6.5 Alert Circle.................................................................................6-4
6.5.1 Terrain....................................................................................6-4
6.5.2 Obstacles ................................................................................6-4
6.6 Obstacle Symbology..................................................................6-5
6.6.1 Obstacles in TOPO Display....................................................6-5
6.6.2 Obstacles in REL Display ......................................................6-7
6.7 TAWS Inhibit - FLTA ...............................................................6-8
6.8 Simultaneous TAWS and TFC Alerts........................................6-8
7GPWS ALERTING............................................................................7-1
7.1 Mode 1 – Excessive Rate of Descent.........................................7-1
7.2 Mode 2 – Not Implemented.......................................................7-1
7.3 Mode 3 – Descent after Takeoff.................................................7-1
7.4 Mode 4 – Landing Gear.............................................................7-2
7.5 Mode 5 – Glideslope..................................................................7-2
7.6 Mode 6 – Altitude Callouts........................................................7-2
7.7 TAWS INH - GPWS..................................................................7-3
8RADAR ALTIMETER FUNCTIONS..............................................8-1
9TRAFFIC FUNCTION......................................................................9-1
9.1 Traffic Display...........................................................................9-1
9.2 TFC Button ................................................................................9-1
9.3 Traffic Processor Altitude Mode................................................9-2
9.4 TFC Range Ring........................................................................9-2

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9.5 Symbology.................................................................................9-3
9.6 Altitude Tags..............................................................................9-4
9.6.1 Relative...................................................................................9-4
9.6.2 Traffic Absolute Altitude .......................................................9-4
9.6.3 Traffic Alert Priority...............................................................9-4
10 PILOT MENU........................................................................10-1
10.1 GS INHIBIT.............................................................................10-1
10.2 TAWS INH..............................................................................10-2
10.3 TEST........................................................................................10-3
10.4 TCAS TEST.............................................................................10-4
10.5 Traffic System Altitude Mode .................................................10-5
10.6 Brightness ................................................................................10-6
10.7 System Status...........................................................................10-6
10.7.1 Equipment List.....................................................................10-7
11 EXTERNAL SWITCH AND ANNUNCIATORS...............11-1
12 ON SCREEN ANNUNCIATIONS .......................................12-1
13 HTAWS SYSTEM LEVEL ERROR DISPLAY.................13-1
14 TROUBLESHOOTING ........................................................14-1
14.1 Nuisance Alerts........................................................................14-1
14.2 Flight Data ...............................................................................14-1
14.3 Gray Terrain Cells....................................................................14-1
15 SPECIFICATIONS................................................................15-1
16 ACRONYMS..........................................................................16-1
17 JEPPESEN TERMS AND CONDITIONS..........................17-1

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TABLE OF FIGURES
Figure 5-1 ST3400H Physical Features....................................................5-1
Figure 5-2 Display Overview TOPO/FULL.............................................5-2
Figure 5-3 Startup Screen.........................................................................5-3
Figure 5-4 Initial Display.........................................................................5-4
Figure 5-5 FULL and ARC Views...........................................................5-5
Figure 5-6 REL and TOPO Displays........................................................5-6
Figure 5-7 REL Display Color Banding relative to aircraft altitude ........5-7
Figure 5-8 Display Orientation.................................................................5-8
Figure 5-9 Display Ranging.....................................................................5-9
Figure 5-10 Overlay Button ...................................................................5-10
Figure 5-11 Heading Pointer – FULL View...........................................5-11
Figure 5-12 Heading Pointer – ARC View ............................................5-11
Figure 5-13 Alert Sensitivity Selection..................................................5-12
Figure 5-14 Off-Airport Mode Selection................................................5-13
Figure 5-15 MUTE Button Highlighting................................................5-14
Figure 5-16 MUTE Annunciator............................................................5-14
Figure 5-17 Brightness...........................................................................5-15
Figure 5-18 Flight Plan Line ..................................................................5-16
Figure 6-1 “CAUTION TERRAIN” Annunciation..................................6-1
Figure 6-2 Terrain Alert Flying Toward Obstacle – Level Flight............6-2
Figure 6-3 Terrain Alert Flying Toward Obstacle – Descending Flight ..6-2
Figure 6-4 “WARNING TERRAIN” Annunciation.................................6-3
Figure 6-5 Obstacle Alert on a tall tower.................................................6-5
Figure 6-6 Obstacle Symbols ...................................................................6-5
Figure 6-7 Obstacles in TOPO Display....................................................6-6
Figure 6-8 Minimized Obstacles in TOPO Display .................................6-6
Figure 6-9 Obstacles in REL Display.......................................................6-7
Figure 6-10 Obstacles in REL Display.....................................................6-7
Figure 6-11 Display During TAWS Alerts...............................................6-8
Figure 7-1 GPWS Mode 1 Alerts.............................................................7-1
Figure 7-2 GPWS Mode 3 Alert...............................................................7-1
Figure 7-3 GPWS Mode 4 Alert...............................................................7-2
Figure 7-4 GPWS Mode 5 Alert...............................................................7-2
Figure 7-5 TAWS INHIBIT.....................................................................7-3
Figure 8-1 Radar Altimeter Functions......................................................8-1
Figure 9-1 ST3400 Traffic Overlay..........................................................9-1
Figure 10-1 Pilot Menu ..........................................................................10-1
Figure 10-2 GS INHIBIT.......................................................................10-1
Figure 10-3 TAWS INHIBIT.................................................................10-2
Figure 10-4 TEST...................................................................................10-3
Figure 10-5 TCAS Test..........................................................................10-4
Figure 10-6 Traffic System Altitude Mode............................................10-5

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Figure 10-7 Dimmer Mode.....................................................................10-6
Figure 10-8 System Status......................................................................10-6
Figure 12-1 On-Screen Annunciation ....................................................12-1

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1 INTRODUCTION
1.1 Pilot Information
Publication Date 21-OCT-2010
This guide provides information on the use and operation of the ST3400H
HeliTaws.
Information in this manual is current as of publication or revision date.
Specifications and operational details are subject to change without notice
at the discretion of Sandel Avionics, Inc.
1.2 Copyright
Copyright 2010 Sandel Avionics, Inc.
May be covered by one or more of the following US and foreign patents,
including US patent nos. 6,259,378, 6,489,916, 6,670,288, 6,507,288,
6,750,788, 6,972,695, 7,187,304. Australia Patent No. 750,651. China
Patent No. 1211639C. Israel Patent Nos. 135,174, 153,460, and 155,983.
All rights reserved. No part of this manual may be reproduced, stored, or
distributed without written permission of Sandel Avionics, Inc. Additional
copies of this manual are available from:
Sandel Avionics, Inc.
2401 Dogwood Way
Vista, CA 92081
USA
Tel: [phone]
Fax: [phone]
www.sandel.com
1.3 Revision Notice
The “Effectivity, Errata, and Revision History” allow the use of this Pilot
Guide with a specific software release. The “Effectivity, Errata, and
Revision History” specifically lists the software to which this Pilot’s Guide
applies and corrects any errors or omissions in this revision of the Pilot’s
Guide. Document number 82046-PG-ERR, Effectivity, Errata, and
Revision History” can be found on page 1-3 of this Pilot’s Guide.

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1.4 Operational and Legal Issues
The information displayed on the ST3400H is generated by external
equipment. It is the pilot’s responsibility to ensure the correct
configuration and use of the external equipment. The ST3400H is subject
to all legal and operational limitations of the equipment supplying data to
it. Always refer to your approved Rotorcraft Flight Manual Supplement
for operation and limitations on the use of installed equipment.
Note: Because aircraft vary in their installed equipment, it is important to
note that what is displayed on the ST3400H may vary depending on the
presence or absence of equipment.
Please keep in mind that it is required by Federal Aviation Regulations to
have on board current charts appropriate to the flight. The moving map on
the ST3400H does not fulfill this requirement. Current internal databases
are not required but are recommended. The internal databases supply
supplemental data only (such as nearest airports and obstacles). Flight plan
waypoints are supplied to the ST3400H by the associated approved GPS
receiver.
Supplemental data is intended for positional awareness only.
1.5 Trademarks
Sandel, the Sandel Logo, HeliTaws, and the HeliTaws Logo are
trademarks of Sandel Avionics, Inc.
1.6 Approvals
The FAA has approved the ST3400H under the following TSOs:
TSO-C194: Helicopter Terrain Awareness and Warning System
(HTAWS)
TSO-C87: Airborne Low-Range Radio Altimeter
TSO-C113: Airborne Multipurpose Electronic Displays
TSO-C118: Traffic Alert and Collision Avoidance System
(TCAS) Airborne Equipment, TCAS I
The following certifications also apply to this product:

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Environmental Certification Level: RTCA/DO-160F
Software Certification: RTCA/DO-178B Level C
Complex Logic: RTCA/DO-254 Level C
Installation of the ST3400H in a type-certificated rotorcraft must be
performed in accordance with the Sandel ST3400H Installation Manual,
document number 82046-IM applicable revision.
1.7 Conventions Used In This Manual
The name of a button is placed within square brackets when the button is
described in text. For example, “…press the [VUE] selection button to …”
This manual uses terms, which should be familiar to aviation-minded
readers, such as “Radar Altitude” and “Magnetic Heading”. Terms, which
are specific to the ST3400H, will be placed in the glossary.
1.8 Effectivity, Revision History And Errata
Date:21-OCT-2010
Applies to:ST3400H Software Version 1.01
ST3400H Pilot’s Guide 82046-PG, Revision B1
With the exception of the superseding information contained in this
section, operation of the ST3400H is as described in the ST3400H Pilot’s
Guide referenced above.
Revision History
Revision Date Comments
B1 22-OCT-2010
A/R 1147 Updated Section 17
Jeppesen Terms and
Conditions
B 10-SEP-2010 Revised for S/W Version 1.01
A 06-AUG-2010 Initial Release
No errata applicable to this release

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2 LIMITATIONS
The ST3400H is an alerting system. It is intended for use in rotorcraft for
all phases of flight in VMC and in IMC while operating under instrument
flight rules (IFR).
Due to data limitations it is NOT guaranteed that every actual terrain or
obstacle conflict will produce an alert, and alerts generated may NOT
guarantee successful recovery due to factors such as pilot response, aircraft
performance and database limitations. No standardized recovery technique
is defined as recovery maneuvers may vary.
The ST3400H Terrain and Obstacle displays shall NOT be used for
navigation.
The course line and present aircraft position shall NOT be used for
approach and departure navigation.
The Obstacle Database does not include power lines.
Low Sensitivity or Off Airport Modes must not be selected when operating
under IMC conditions except as required when performing offshore
platform IMC Approach Procedures or other Special Procedures.
The ST3400H must utilize FAA approved software version 1.01 or later
FAA approved version.
The “CRC Self Test Failed” message must not appear on power-up if flight
operations are predicated on the use of the ST3400H.
The ST3400H Pilots Guide, SPN 82046-PG (applicable revision) must be
immediately available to the flight crew.
Data loading and maintenance mode operation are prohibited during
normal flight operation.
Note: The Terrain and Obstacle Displays are intended to serve as a terrain
and awareness tool only. The Display and database may not provide the
accuracy or fidelity on which to base navigation decisions and plan routes
to avoid terrain or obstacles.

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3 WELCOME TO THE ST3400H HELITAWS
3.1 Description
Sandel HeliTaws is a self-contained Helicopter Terrain Awareness
Warning System and which both meets the FAA C194 requirements and
exceeds these requirements with additional display and protection modes
and features. It includes an advanced HTAWS computer, a GPWS
computer, graphics symbol generator and Sandel’s high brightness display
engine built within a standard 3-inch instrument chassis. It includes Radar
Altimeter features and can be used to directly replace an existing Radar
Altimeter indicator. It has the optional capabilities of acting as a primary or
secondary traffic indicator, showing traffic either in standard TCAS format
or overlaid on terrain when connected to an external traffic detection
system.
Terrain protection is enabled during all airborne phases of flight -
Departure, Enroute, Terminal, and Approach and in any selected display
mode.
Pilot selection of low-sensitivity and off-airport operational modes, allows
nuisance-free protection in very demanding missions.
The terrain display features a new plan-view 3D shaded format with
industry leading terrain resolution, providing an unmatched understanding
of the terrain surrounding the helicopter and its contours.
3.2 What it is
The ST3400H is a situational awareness tool and an alerting and warning
device. It is designed to reduce the incidence of CFIT accidents by
providing increased situational awareness of the surrounding terrain and
obstacles, both in VMC and in IMC under Instrument Flight Rules.
The unit supports optional external caution and warning annunciators and
optional external mounted momentary switches to control certain functions
such as alert muting and modes.
The ST3400H uses Sandel’s patented rear-projection display technology.
This technology allows the displayed image to extend to the edges of the
instrument’s bezel. Therefore, even though the Sandel display is in a 3-
inch form factor, its image is approximately the size of a 4” primary
display.

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3.3 What it isn’t
The ST3400H is not the pilot. Remember: it is a tool, and it isn’t perfect.
Neither the terrain data nor the obstacle data on which alerting is based is
guaranteed to be 100% accurate, nor are the sensors feeding the system.
There is no substitution for good judgment by the pilot. The pilot should
always exercise prudent caution, with or without the ST3400H.
Again, it is NOT designed for navigation.
3.4 What it does
During normal flight operations the system remains essentially silent. It
uses GPS, Radar Altitude, barometric altitude, and other relevant data in
combination with its internal database information to provide the pilot with
a full-time terrain display. The look-ahead function compares the aircraft
flight path to terrain and obstacle database information and distance to
known runways and landing zones.
A built-in caution and warning system provides visual annunciation and
aural alerts. Provided are downward-looking Ground Proximity Warning
System (GPWS) alerts, Forward Looking Terrain Alerts (FLTA), and
various advisories.
FLTA provides predictive “look ahead” warnings by comparing its internal
terrain and obstacle database to position information provided by the GPS
receiver.
The internal terrain and obstacle database provides the basis to detect
terrain or obstacle conflicts. This is accomplished using the aircraft
position, phase of flight, vertical speed, ground track, and ground speed
relative to the terrain database image.
Through sophisticated look-ahead algorithms, alerts are generated if terrain
or an obstacle conflict with the flight path of the aircraft. This potential
conflict area projects forward of the aircraft. During enroute operations, a
Caution Alert typically occurs approximately 20 seconds ahead of the
collision conflict. A caution will turn into a warning if evasive action is
not taken after approximately 10 seconds of Caution.
During other operations the alert times may be shorter but Cautions are
always designed to occur prior to Warnings. A Warning does not indicate
a higher severity of threat, but simply that immediate action must be taken.
The Topographic (TOPO) and Relative Altitude (REL) display modes
provide the pilot with fast access to visual information to maximizing the
pilot’s understanding of the relationship between the aircraft and the

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ground. An image of the surrounding terrain is represented in color.
Terrain and Obstacles can be displayed along the forward path or
completely around the aircraft, at distances up to 20nm.
An internal data recorder automatically records a minimum of the last
twenty hours of flight data. Oldest data is automatically overwritten with
most recent data. This data can be used by Sandel Customer Support to
analyze recent alert activity.
3.5 Other Features
Display of Radar Altitude is provided along with a MINS setter.
Display of Traffic from an external traffic processor is provided.

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4 SYSTEM OVERVIEW
4.1 “Design Cruise Altitude”
The ST3400H introduces the concept of “Design Cruise Altitude”. This is
the nominal cruise altitude at which the ST3400H is designed to give
nuisance-free alerts with a black (no terrain showing) relative altitude
display.
4.1.1 Sensitivity
To facilitate low altitude operations unique to helicopters, the ST3400H
supports two pilot selectable alert sensitivity modes: Normal Sensitivity
and Low Sensitivity.
In NORM Sensitivity the Design Cruise Altitude is 500’ AGL. In LOW
Sensitivity, the Design Cruise Altitude is 300’ AGL - allowing standard
operations closer to the ground.
In addition to changing the alerting criteria, the selected Sensitivity adjusts
the relative altitude display colors to provide a black display screen at the
design cruise altitude to prevent color flooding.
4.2 Off Airport Landings
In addition, an Off Airport Mode is pilot selectable which operates at either
Sensitivity.
Alerts are normally automatically suppressed during the landing phase at
an airport or helipad. OFF-APT mode further suppresses alerts for landing
at random non-airport locations, such as for EMS operations. When this
mode has been selected, no further pilot action is required and no nuisance
alerts will be generated when landing anywhere. Normal alerting criteria
are automatically established when not landing or in cruise flight.
4.3 Alerts, Warnings and Cautions
An Alert is defined as either a Caution or Warning, generated by the
GPWS computer or the FLTA computer. A Caution is defined as an alert
which indicates that pilot action will be needed shortly; a Warning alert
indicates that pilot action is required immediately.
If any alert occurs, the alert text is shown at the bottom of the screen and
an audible alert message will occur on the cockpit audio system. The REL

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(relative altitude) terrain display is automatically selected at an appropriate
range to put the alerting terrain on-screen.
Pilots should train to react properly to all alerts, cautions and warnings, just
as one would train to react to any other potential or actual emergency
situation.
Pilot reactions to alerts and warnings differ according to weather
conditions, visibility, types of warning, phase of flight and aircraft
performance considerations. Pilots should be thoroughly familiar with
FAA, company, or other approved operational procedures as required by
their aircraft and type of operation.
The ST3400H is not the pilot nor is it a substitute for the pilot’s judgment;
it is a display and computer. However, because it is designed to only alert
when the aircraft is outside normal flight envelopes in relation to terrain,
we recommend that all alerts should result in immediate and appropriate
action by the pilot. A Warning should always result in an evasive
maneuver.
4.4 TAWS Inhibit
A pilot selectable TAWS INH function allows the Pilot to disable all alerts.
When selected, all FLTA and GPWS alerts are inhibited, and the terrain is
removed from the screen. All altitude Callouts will still be enabled.
4.5 Display
4.5.1 Topographic Display
A Pilot Selectable TOPO (Topographic) view shows all terrain, in
sectional-chart colors. Terrain and Obstacles are shown RED when
above the aircraft altitude.
4.5.2 Relative Altitude Display
A Pilot Selectable REL view shows only proximate terrain and
obstacles.
4.5.3 Obstacle Display
The ST3400H displays obstacles above 50’ AGL using the standard
obstacle symbol. Obstacles above 500’ are displayed using the tall
tower symbol (see section on obstacle display).

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4.5.4 Flight Plans
The ST3400H overlays the GPS/FMS flight plan over any terrain view,
if a flight plan is available from the GPS /FMS.
NOTE: The flight plan overlay is for position awareness only and the
information in the flight plan has absolutely no effect or control over
alerting. For this reason, alerting works identically whether the aircraft
is on-flight plan or off-flight plan – without pilot intervention.
NOTE: Display of DME arcs, Holding Patterns, and Procedure Turns is
not currently supported in the ST3400H with S/W version 1.01. These
flight plan segments will be supported in a future software release.
4.5.5 Airports and Runways
For reference, airports are displayed with runways greater than 2500 feet
within 20nm of the aircraft position. In lower zoom ranges, the airport
runways and runway numbers are depicted on-screen.
4.5.6 Radar Altimeter Display
The ST3400H can function as an optional primary or secondary Radar
Altimeter indicator when interfaced to a compatible Radar Altimeter
system. Digital RADALT (Radar Altitude) and a MINS setting window
are provided.
Radar Altitude will not be displayed when a Radar Altimeter is not
installed; however the MINS display is always present and may be used
by the pilot as a reference number.
4.5.7 Traffic
The ST3400H can optionally display nearby transponder equipped
aircraft when interfaced with compatible TAS, TCAS. Standard TCAS
symbology is used to display the relative location and altitude of traffic.
The traffic information is displayed overlaid on terrain.
Note: If the ST3400H is interfaced to TCAS, the TCAS processor itself
generates the alerts and these are only displayed on the ST3400H.
4.5.8 NVIS
For missions requiring the use of night vision goggles, certain ST3400H
models are equipped with Sandel’s proprietary on-demand Class-B
NVIS capability. Unlike aftermarket NVIS modifications, Sandel’s
unique NVIS feature employs no external filters and does not degrade its
brightness or daylight characteristics when NVIS is OFF.

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NVIS is activated through the use of an external switch or push button.
Refer to the Rotorcraft Flight Manual Supplement for your specific
ST3400H installation for details on NVIS operation.
4.6 Sensors
Sensor data is the input data fed to the ST3400H that comes from external
sources. There are no sensors inside the ST3400H. Data is derived from
the following sensors:
GPS Position
FMS Flight Plan
Compass system (AHRS, DG) (optional)
Radar Altimeter (optional)
Traffic Computer (optional)
Airdata Computer (optional)
Heading data from an AHRS or compass system is used to provide terrain
display while hovering.
4.7 Database
Databases are supplied by Jeppesen. See Chapter 17 for Terms and
Conditions regarding the use of the databases contained within the
ST3400H.
4.7.1 Coverage area of the database
The internal database of the ST3400H includes terrain, charted man-
made obstacles above 50’ AGL, and airports with runways greater than
2500 feet in length. Obstacles are shown, processed and alerted
discretely from the terrain.
The terrain and airport database coverage is provided by geographical
area. Coverage is limited to those areas between 70N and 70S latitude.
Obstacle data is included for most countries. Please contact Sandel for
the most current coverage information.
Note: There is no guarantee that every obstacle is charted or that every
charted obstacle is in the obstacle database.
4.7.2 Database updates
Updates are uploaded into the ST3400H through a USB port located on
the front right corner of the display bezel.

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5 TERRAIN DISPLAY AND OPERATION
The following section describes the appearance of the ST3400H display
and identifies each functional element.
5.1 Control Overview
The ST3400H physical layout consists of a display screen, 9 backlit
buttons, one push-pull rotary knob, and one USB connector.
Terrain REL/TOPO
Reserved
Traffic Mode
MINS Set
Pull for Brightness
Pilot’s Menu
Alert Sensitivity
Select Caution Audio Mute
USB Port
Range Down
Range Up
ARC/FULL
View
Figure 5-1 ST3400H Physical Features