NorthStar 961X, Руководство по эксплуатации и справочник

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Chapter 13 - Customizing Setup Functions
Page 13-10 961 Operations and Reference Manual Rev. D
• geodetic datum
• preferred loran GRI
• waypoint switching
• magnetic variation
• distance, bearing, and steering calculations
Each of these options is described in detail below.
NOTE:
If you’re viewing and editing information on the
NAVIGATION
SETUP
screen, and you press one of the five function keys to view
other data, the 961 immediately cancels your edit-in-progress so
that you can view the data requested by your function keypress. To
resume editing at the
NAVIGATION SETUP
screen, you must
return to that screen and re-enter the data that you lost when you
pressed the function key. To purposely cancel an edit-in-progress,
however, you’d normally press the
CANCEL
key.
Geodetic
datum
Different regions of the world have various models for lat/lon
coordinates on their charts; each model is called a datum. The
datum the 961 uses on its
CHART
screen always matches that
of the chart-in-use. The non-chart screens and the serial data
input and output use the same datum as chart view A, unless
you change the
GEO DATUM
setting from auto to manual (the
auto setting is
WGS84
). Once in manual, you then select the
datum you want the 961 to use for non-chart screens and
serial data. Note that when you set geodetic datum to manual,
the same physical location, such as a waypoint, may have
slightly different coordinates on the
CHART
screen and
non-chart screens.
The 961 lists all referenced datums, according to Defense Map-
ping Agency publications, in its geodetic datum option.
To change the non-chart screen datum reference of your 961:
1. At the
NAVIGATION SETUP
screen, press the
CURSOR
PAD
to highlight the
GEO DATUM
option, then press the
EDIT
key.
2. Press the
CURSOR PAD
right or press the
ARROW
keys
to select
MAN
(for manual), then press the
ACCEPT
key.