Eagle Electronics Z-9500

Waypt Lat/Long:

This sections covers the Z-9500's loran operation. The ELC-1

loran module must be attached to the Z-9500 for

position

data.

r Use Position

CI I

If you are east of Greenwich, England (east longitude), press

the key

adjacent to the EAST/WEST label. Otherwise, if everything on this

screen is correct, press

the key next to the "Use Position" label. The

screen at the bottom of this page appears next.

This menu gives you two choices. There are more choices on other

menu pages. You can save the waypoint under the next available

number, using

the "SAVE AS #" label at the

top of the screen. The

VIEW/SAVE menu stores the

waypoint under

any number you desire.

(See

the

Saving Present Position -View and Save Method.) Pressing

the

key

next to the "More" label

brings up the "New

Waypt.

Num." label

which lets you save the

position

under

any waypoint number. Finally,

you can travel directly

to the

waypoint and not save it by pressing

the

LORAN

- General

Loran is short for

LOng RAnge Navigation. It's a

navigation system

that

uses powerful low frequency (100 kHz) radio transmitters and sensitive

receivers. Thus, you can determine your position

over long

distances.

Loran was

developed

and used during

World War II. At that time it was

called Loran-A and operated at a higher frequency. Research and

development continued during the fifties. The current Loran version,

Loran-C, was introduced in the sixties. It works over longer

distances

than Loran-A and it's easier to use.

ACCURACY

The absolute accuracy

of Loran is between 0.1 and 0.25 nautical miles,

depending on

your location. Repeatable accuracy (your ability

to return

to the same spot) is 100 feet or better. The difference between the two

types of accuracy

is important. Absolute accuracy tells you where

you

are on the map. Repeatable accuracy

lets

you find your way back to the

same site time after time.

However, the accuracy you experience may not be as good as the

numbers above suggest. The crossing angle of the lines of position

affects the

accuracy. The

sharper

the

crossing angle, the more chance

for position error. A

ninety degree crossing angle

is best, but it can vary

down to

thirty degrees

without a large position

error.

you wish to double check

your Loran, first pick a

spot

on the chart that

is clearly

marked with latitude/longitude marks. Then

to it. Once

you

arrive,

let the Loran settle,

then compare

the

position information on the

Z-9500 to the chart. It should be very

close.

82 55

N 32°OO.45'

U 83°11.33

r East/West Long. U

NOTE:

Save Uaypoint

TOl :45360.42

T02 :60365.70 N 32° 00.45'

hi 80°11.33'

Save as 11 1

View/Save Waypt. I

Clear ri

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