Lowrance lms-522c igps 操作指南

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页码 252
75 
Noise Rejection 
See the entry on Advanced Signal Processing in this section. 
Overlay Data 
On any Page display except Satellite Status, you can "float" or overlay 
additional GPS or navigation data on the screen with the Overlay Data 
command. For example, if you left your watch at home, you could dis-
play the local time on top of the map. Or, if you wanted to see details 
about your route and trip, you could show your bearing, course, average 
speed and trip distance. 
The various data available from your unit are divided into categories in 
the Overlay Data menu. These categories include GPS Data, Naviga-
tion, Trip Calculator, Time, Sonar Data and Miscellaneous Data. 
You can select items from any of these categories for display, in any 
combination — the category divisions are there only to help you sort 
through the information. 
 
 
Overlay Data highlighted on sonar menu (left). Overlay Data Shown 
menu (right). 
To overlay information on your screen: 
1. Press 
MENU
|
↓ to 
O
VERLAY 
D
ATA
|
ENT
2. If you currently have any overlay data on your screen, it will be 
listed here. Select 
(E
NTER TO ADD
and press 
ENT
. The data viewer shows 
information categories with "+" or "–" symbols next to each category 
name. A category with a "+" next to it is expandable, meaning its con-
tents are hidden. 
Selecting the category name and pressing 
ENT
 will show the category's 
contents, so you can choose items within it. An expanded category (one 
with a "–" next to its name) can be collapsed to hide its contents. Just 
select the category name and press 
ENT