Lowrance electronic GlobalMap 1000 Manuel d'utilisateur télécharger pdf (Page 31)

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the WAYPT/ROUTE

key.

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24 T 9° 205°

14 T 13° 86° 38

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T 9° 30° 37

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12 T 100 328° 35

The Fix status and "DOPS"

_________________

show in the

upper right portion

of the

display.

The fix

quality

_________________

has a

range

from 0-9. 9 is the

___________________

best,

0 the worst. As the fix

number

decreases,

the

position's

"jitter"

increases. Jitter is the small

position changes your

present position symbol

makes when

you're

not

moving.

This movement

is normal and

happens

in all electronic

navigation equipment.

Beneath the

fix

display

are the "DOPS"

GDOP

(Geometric),

HDOP

(Horizontal),

VDOP

(Vertical),

PDOP

(Position),

and TDOP

(Time).

DOP stands for

"Dilution Of Precision". The smaller the number in these

fields,

the better.

otherwords,

the smaller numbers mean the

GlobalMapi

000 is

showing

more accurate data than when

large

numbers are

showing.

The satellites that are in view of the receiver In the bottom

right

corner of

the screen.

The LGC-1 GPS receiver will track all of the satellites

in view.

Using

a five channel

GPS

receiver,

it will use

to four

satellites to

calculate

position.

Thefifth channel tracksthe

remaining

satellites. Data on

each channel

from the LGC-1 is shown at the bottom left corner of the

display.

The channels are numbered

onethrough

five on the left side of the

screen.

Every

satellite in the constellation has a number

assigned

it,

called the PRN. The PRN is

the first number in the channel's row. TRK

stands for "track."

If the

GlobalMap

1000 is

tracking

the

satellite,

then a "T"

placed

in this column. If the

GlobalMap

1000

issearchingforthesatellite,

then a "5"

appears.

ELV is the elevation

(height)

of the satellite above the

horizon from

your position.

AZM is the azimuth or direction of the satellite

from

your position. Forexample,

if the azimuth

of a satellite is 180

degrees,

then it is due south. SNR is the

signal-to-noise

ratio. This

tells

you

how

strong

the satellite's

signal

is. The

higher

the SNA

number,

the better.

DGPS BEACON RECEIVER STATUS

you

have a Lowrance LGC-1 GPS module and

a DGPS beacon receiver

connected to the

GlobalMap

1000,

then

you

can view the

DGPS receiver

status

by pressing

the POSITION

keytwice.

screen similarto the one at

the

top

of the next

page appears.

press

the

key

next to

the "Navi-

gate

to Cursor Position" label.

The

GlobalMap

returns to the

mapping

screen with

naviga-

tion data

showing

in the

digital

boxes.

A doffed line

appears _________

the

map

from

your present

position

to the

cursor, showing

the

shortest,

most

direct line to

the cursor

position.

A box with

the letter "5"

appears

at the

location

you

were in when

you pressed

the

"Navigate

to Cursor

Position"

label. The cursor

position

is marked

a small box and the letters "XX"

which remain on the

screen,

even

you

turn the cursor lines off. For more

information,

see the

waypoint navigation

section.

To turn the cursor lines

off,

simply press

the CURSOR

key.

TRAIL PLO1TER

Your

present position

marker

leaves a line or"trail" behind as

moves across the

map,

ac-

cordingtothe

boat's movement.

This

makes it

easy

to deter-

mine the

path you've

taken.

There

are several

ways you

can customize

the trail

plotter.

__________

To do

so,

first

press

the MENU

key.

Now

press

the

key

next to

____________________

the "Trail Plotter"

label. The

___________________

screen

shown at the

top

of the

page

appears.

There are seven menu selections on this

screen,

all

which relateto thetrail

plotter. Afteryou've

made a selection

on this

screen,

press

the

CLR

key

to exit.

The first item

at the

top

of the screen is "Clear Trail." This erases the

plot

trail from the

screen. This is

only

temporary,

the

GlobalMap

1000 will

continue to draw

your

trail

from the location it was in when the

key

next to

the "Clear Trail"

label was

pressed.

you

wishto

changethe plottrail

from a solid lineto a dotted

one,

ora solid

one that flashes

about once

every

two

seconds,

then

press

the

key

to the "Trail

Type"

label until the check mark is on the desired box.

GPS status

display.

This tells

you

if the unit

is in the 2D mode

(position only),

3D mode

(posi-

tion and

altitude),

or if DG PS is

operational.

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7/09/1993

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Navigation

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Lowrance electronic GlobalMap 1000 Manuel d'utilisateur Page 31

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