Storing Present Position Into A Waypoint Memory (Wpt Mode); Converting Coordinates (Wpt Mode) - Furuno LC-90 Owner's Manual

check the target waypoint before you attempt to transfer position data from
an Event Memory to make sure it is unused.
Select the desired event number on the second line by first pressing | CLR | ,
and then typing the desired Event number (two digits long), followed by
fÉ'^Tl . Then select the Waypoint number into which you wish to transfer the
data from the Event number. The cursor will automatically have moved down
to the third line after you pressed the IENT1 key. You would now press the
| CLR I key , and then type in the desired Waypoint number, followed by
I ENT | .
For example, let's say that you want to observe the position stored in Event
memory number 05, and that you then want to transfer that data into
Waypoint number 59. The touchpad sequence would be as follows:
1. Get into the Event Function #0 by hitting the
\T]
key, followed by [T] .
2. Hit [CLR] QD [5] [ENT]
3. Hit [CLR] [5] [9] | ENT j
4. Now verify that Waypoint 59 actually contains the Event data by accessing
the WPT Mode and calling up Waypoint 59.
Storing Present Position into a Waypoint Memory ( EVT in WPT Mode):
When you press | EVT lin the WPT mode, the present position will be recorded
into the waypoint memory number you have specified, as has been already
described. Put the LC-90 into the WPT Mode by using the left or right
arrow keys to move the Mode indicator arrow to line up directly over the
"WPT" label. The cursor will be flashing on the third line. Hit the 1 CLR 1
key, specify the waypoint number into which you want to store present
position, and then hit the 1 ENT] key. Make sure that you are in the
Latitude/Longitude format in order for this function to work p roper ly. Now
you can press the |EVT| key. Note that your present position has now
appeared on the bottom two lines of the display.
CONVERTING COORDINATES (WPT Mode)
The LC-90 enables you to convert position coordinates from TD format to
Latitude/Longitude format and vice-versa in the WPT Mode. First, get into
the WPT Mode using the left or right arrow cursor keys. Select an empty
waypoint memory number; i.e., one where the L/L is all zeroes. If you try
to make a conversion using a waypoint that already has data stored into it
you will lose the earlier information completely.
Note also that the TD's you enter must be the same as the slave TD'a
actually in use by the LC-90 and that the GRI must be the same as the one
presently in use. For example, assume the GRI is 9940, and the two slaves
in use are the 27 and 43 lines. We want to convert the following TD's to
L/L: 43156.7, and 27245.9 microseconds.
1. Call up the WPT mode.
2. Select an empty waypoint number (a waypoint where the L/L is all zeroes)
on the third line.
3. Press
I
TD
<-»
lTITI to change the position display to the TD format, if
necessary.
4. Type TDI on the fourth line: i CLR 1 ®
[U
|T]
[5] [6] (T] [ENTI .
5. Type TD2 on the bottom line: fOLR] [f]
S
Hl
GD Ø S 1
ENT] .
6. Press |TD<-» L/~L~| to perform the conversion.
To convert L/L to TD's, specify the desired (empty) waypoint number, type
in the desired Latitude and Longitude while in the L/L format, and then
press the ITD <-»L/L I conversion key.
Note that the LC-90 stores all waypoints as L/L positions rather than as TD
positions. The conversion between L/L and the corresponding TD's thus may
be a lit tle bit dif ferent from measured TD's, perhaps as much as 0.1
microsecond. This is the result of normal computational accuracy due to
rounding-off of numbers in the internal calculations.
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