Map Fix. Lowrance LCX-38C HD, LCX-113C HD, LCX-112C, LCX-28C HD

The military grid reference system (MGRS) uses two grid lettering schemes, which are referred to as standard and standard + 10 MGRS on this unit. Your position and datum in use determines which one to use. If you use standard, and your position is off significantly, then try the alternate.

NOTE:

When the position format is changed, it affects the way all positions are shown on all screens. This includes waypoints.

To change the coordinate system, press

ENT

while

C

OORDINATE

S

YSTEM

is highlighted. Press the ↑ or ↓ keys to highlight the desired format. Press

ENT

. Press

EXIT

to close the menu.

To setup Loran TD:

NOTE:

If the Loran TD conversion is chosen, you must enter the local

Loran chain identification for the master and slaves. Do this by selecting "Setup Loran TD" at the bottom of the "Coordinate

System" menu and select the ID. Press

EXIT

to close this menu.

Configure Loran TD menu.

Map Fix

Map Fix is used with charts or maps. This system asks for a reference position in latitude/longitude, which you take from a marked location on the map. It then shows the present position as distance on the map from that reference point.

For example, if it shows a distance of UP 4.00" and LEFT 0.50", you then measure up four inches and to the left a half-inch from the reference point on the map to find your location.

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To configure a map fix:

To use this format, you need to follow these steps in order. First, take your map of the area and determine a reference latitude/longitude. (Please note that in order for this system to work, the latitude/longitude lines must be parallel with the edge of the map. USGS maps are parallel, others may not be. Also, this works better with smaller scale maps.) The reference position can be anywhere on the map, but the closer it is to your location, the smaller the numbers you'll have to manipulate.

Once you've decided on a reference position, you can save it as a waypoint.

See the waypoint section for information on saving a waypoint. Save the reference position as a waypoint. Exit from the waypoint screens.

1. Press

MENU

|

MENU

| ↓ to

GPS S

ETUP

|

ENT

.

2. Press

↓ to

C

OORDINATE

S

YSTEM

|

ENT

.

3. Press ↓ to

S

ETUP

M

AP

F

IX

|

ENT

.

The following screen appears, and

M

AP

S

CALE

is highlighted. Press

ENT

and enter the map's scale. This is generally at the bottom of the paper map. It's shown as a ratio, for example 1:24000. Press

EXIT

and the unit returns to the Configure Map Fix screen.

Configure a map fix so the unit can find your position on a printed chart or topographical map.

Press ↓ to

S

ELECT

O

RIGIN

|

ENT.

Press → |

ENT, then ↓ or ↑ |

ENT to choose a saved waypoint. Select the waypoint you saved the reference point under and press

ENT

. The unit displays a waypoint information screen with the command

S

ET

A

S

O

RIGIN

selected; press

ENT

and the unit returns to the Configure Map Fix menu.

Finally, press

EXIT

to close this menu. Now press ↑ to

C

OORDINATE

S

YSTEM

|

ENT

, select

M

AP

F

IX

from the list and press

ENT

|

EXIT

|

EXIT

|

EXIT

. All position information now shows as a distance from the reference point you chose.

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