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ESHI
At Last - an EFIS for You
For years, pilots of large commercial aircraft have enjoyed
the benefits of Electronic Flight Instrumentation Systems
commonly known as EFIS. EFIS displays combine data
from different sources within the aircraft and provide the pilot
with a unified view to greatly simplify the instrument
scan and significantly improve positional awareness. A full
EFIS system includes an EADI for attitude and an EHSI for
primary navigation.
EFIS systems are rarely found in general aviation cockpits
because they’re too large, too heave and too expensive. Display
screens of five by seven inches are common, and costs
can exceed the entire value of some GA aircraft. This combination
of cost, complexity and sheer physical size limits
them to larger jets and turboprops.
The SN3308 provides all the functions of an EHSI in a package
that’s sized and priced just right for you. The press has
called the Sandel SN3308 “The glass cockpit for the rest of
us,” and with good reason.
Standard Rose Mode view showing VOR1 tuned to
ISLK, an offset ILS/DME. The red X indicates that
there is no Glide Slope data available.
Disclaimer
This software is designed for entertainment only. Although it has been designed to resemble and function as
much like the actual avionics as possible, it is not designed as a training device. Only a subset of the real
instrument’s functions have been simulated, and some functions have been redesigned to function within the
capabilities of Flight Simulator 9. This version has been designed at twice the actual size of the real instrument.
NOT CERTIFIED FOR USE IN REAL FLIGHT OR FLIGHT TRAINING
The Only Three-Inch EHSI
Sandel Avionics invented the breakthrough technology
behind the SN3308 making possible the three-inch electronic
HSI. Why three-inch? Because that’s the standard
size that fits perfectly in most aircraft panels.
FAA-certified as a primary navigation display under
TSO C-113, it cost about the same as a conventional mechanical
HSI and can directly upgrade an existing mechanical
DG, RMI, or HSI such as a Bendix/King
KCS-55A or IN-831A, Century NSD-360 or Collins PN-
101.
The SN3308 vastly improves situational awareness to
help you fly with more precision, and reduces the likelihood
that you’ll overlook important navigation data during
a critical phase of your flight. Information is
displayed in brilliant color from all your avionics, selectable
by LED lighted buttons surrounding the display.
Standard Rose Mode showing VOR1 tuned to BTV
VOR/DME, at 43.9 Nm, VOR2 is tuned to PLB VOR/
DME, at 34.54 Nm, and the ADF is tuned to SL.
Eaglesoft Development Group: Citation II SP/2 C551 Operating Manual
16
Operating the EHSI
The NAV button will select the primary
navigation source. Because of
FS limitations, only NAV1 and the
GPS are selectable.
The display will indicate what type
of signal is being received as follows:
VOR - DME - ILS - LOC or
GPS
The BRG button is used to de-clutter
the display, by showing only the desired
information as follows:
OFF
VOR1
VOR2
ADF
VOR1 + VOR2
VOR1 + ADF
VOR2 + ADF
ALL
The VUE button toggles between the
ROSE mode and the ARC mode.
The H-S button is the Heading Sync
control. It will ‘snap’ the orange
The O-S is the Omnibearing Sync HDG bug to the current heading
button. It will ‘snap’ the OBI needle
to the current heading.
OBI/CRS Bearing
Current Heading
Heading Bug Bearing
Heading Bug Adjust
OBI/CRS Adjust
Ground Speed
Time to Target
There are a lot of options contained within such a small instrument. However, great care was taken to provide a
carefully color-coded display to help keep the information easy to follow.
VOR1 information is shown in
OBI Needle, CDI Needle, VOR1 Arrow, Ident, Distance, Time, and CDI/GS “balls.”
VOR2 information is shown in
VOR2 Arrow, Ident, and Distance.
ADF information is show in
ADF Arrow and Ident.
GPS information is shown in
OBI Needle, CDI Needle, GPS Arrow, Waypoint ID, Distance, Time and CDI “ball.”
VOR2 Ident
& Distance
VOR1 Ident
& Distance
BEIGE:
PURPLE:
GREEN:
BLUE:
An Example
The easiest way to explain the ESHI is to provide an example of using it on a typical flight. We are flying from
Saranac Lake (KSLK) to Quebec-Lesage (CYQB). We have just taken off from KSLK and are now on an intercept
to our desired GPS track. Notice that VOR2 is tuned to YUL, the VOR/DME for Montreal, which provides
　
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