Lowrance 5150c 操作指南

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In the preceding example figure, the driver is headed northwest (a 345º 

track) toward a waypoint 346º (bearing) away. The cross track error 

range (white corridor) is 0.15 miles either side of the course. The driver 

is headed toward trail waypoint 1, which is 0.3 miles away. The vehicle 

is 234 feet right of the original course. Traveling at a speed of 17 mph, 

the driver will arrive at the waypoint in 1 minute, 3 seconds. 
The Navigation Page has its own menu, which is used for some ad-

vanced functions and for setting various options. (Options and setup 

are discussed in Sec. 5). To access the Navigation Page Menu, from the 

Navigation Page, press 

. 

Map Page 
The Map Page screens show your course and track from a "bird's-eye" 

view. By default, this unit shows the map with north always at the top 
of the screen. (This can be changed. See the topic Map Orientation, in 

Sec. 5.) If you're navigating to a waypoint, the map also shows your 

starting location, present position, course line and destination. You 

don't have to navigate to a waypoint, however, to use the map. 
Map Page is the default screen that appears when you turn on the unit. 
To get to the Map Page from another page: Press 

|

→ or ← to 

|

. When the Map Page is displayed, a screen similar to the fol-

lowing figures appears. 
The arrow in the center of the screen is your present position. It points 

in the direction you're traveling. The solid line extending from the back 

of the arrow is your plot trail, or path you've taken. 
The map zoom range is the distance across the screen. This number 

shows in the lower left corner of the screen. In the first of the following 

example figures, the range is 4,000 miles from the left edge of the map 

to the right edge of the map. 
The Zoom In and Zoom Out keys zoom the map to enlarge or reduce its 

coverage area and the amount of mapping detail shown. There are 40 

available map zoom ranges, from 0.02 miles to 4,000 miles.