Chapter 13 - Customizing Setup Functions
961/962 Operations and Reference Manual, Rev. A
Page 13-23
2. Press the
CURSOR PAD
left or right or press the
LEFT
ARROW
or
RIGHT ARROW
keys to select
TRUE
,
AUTO
,
or
MAN
(for manual).
3. When done, press the
ACCEPT
key (or
CANCEL
to leave
the option unchanged).
If you’ve chosen
MAN
, press the
EDIT DATA
key, then use
the
KEYPAD
to enter the variation for your area. If you
make a mistake during data entry, press the
LEFT
ARROW
and
RIGHT ARROW
keys to position the cursor.
To change between east and west variation (west is
appropriate on the East coast of the U.S.), press the
ARROW
keys to position the cursor, then use the
KEYPAD
to choose either
E
or
W
.
4. When done, press the
ACCEPT
key (or
CANCEL
to leave
the option unchanged).
5. Press
RETURN
to go back to the
SETUP MENU
screen.
Distance,
bearing, and
steering
calculations
The shortest distance between any two points on the surface
of a sphere, appearing as a curved line on a Mercator grid, is
known as the great circle. By comparison, a constant direction
to your destination is known as a rhumb line, which appears
as a straight line on a Mercator grid. Over long distances, a
rhumb line provides a somewhat longer route of travel than a
great circle route. However, if a great circle route takes you too
close to bad weather or an unavoidable land mass, you may
want to follow a rhumb line. Rhumb line navigation is the
default method for calculating distance, bearing, and steering
(XTE) to waypoints.
You can calculate distance, bearing, and steering to your
destination along either a great circle
route or a rhumb line.
NOTE:
If your starting and ending points are under 100 nm apart, great
circle and rhumb line paths are practically the same.
1. At the
NAVIGATION SETUP
screen, press the
CURSOR
PAD
to highlight the
DIST/BRG/STEER
option, then press
the
EDIT
key.
Summary of Contents for 961
Page 6: ...Page viii 961 962 Operations and Reference Manual Rev A ...
Page 8: ...Page x 961 962 Operations and Reference Manual Rev A ...
Page 14: ...Page xvi 961 962 Operations and Reference Manual Rev A ...
Page 92: ...Chapter 3 Using the Controls Page 3 34 961 962 Operations and Reference Manual Rev A ...
Page 160: ...Chapter 6 Creating Waypoints Page 6 18 961 962 Operations and Reference Manual Rev A ...
Page 176: ...Chapter 7 Creating Avoidance Points Page 7 16 961 962 Operations and Reference Manual Rev A ...
Page 202: ...Chapter 8 Creating Routes Page 8 26 961 962 Operations and Reference Manual Rev A ...
Page 380: ...Glossary Page G 8 961 962 Operations and Reference Manual Rev A ...