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Navigation chart settings, Understanding chart data – Garmin GPSMAP 4000 User Manual

Page 10

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GPSMAP 4000 Series Owner’s Manual

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Navigation Chart Settings

To access additional settings or options for the navigation chart, press MENU.
Weather—turns the NEXRAD weather overlay on or off. Only available when connected to a

Garmin XM network device. See

page 48

for more information.

Overlay Numbers—controls how charting numbers appear on the screen. Choose to show or hide

the numbers by category. When set to

Auto

, the overlay numbers appear only when that category is

active.

Cruising: GPS position, GPS heading, GPS speed, and depth. Depth is only available if

connected to a sonar unit.
Navigation: GPS position, distance to destination, arrival (time), bearing (to destination), GPS

heading, and GPS speed. These numbers appear only when navigating to a destination (see

page 20

).

Fishing: GPS position, depth, water temperature, and water speed. Depth, temperature, and speed

are only available when connected to a sonar unit.
Sailing: GPS position, waypoint velocity made good (VMG), wind speed, wind direction, water

speed, and depth. Wind speed and direction are only available when connected to an optional

wind sensor. Water speed and depth are only available when connected to a sonar unit. If you

have a wind sensor, setting the sailing overlay numbers to Auto places an indicator around the

boat icon on the Navigation chart to represent wind speed and direction.

Chart Setup—customizes the Navigation chart. See

page 9

.

Understanding Chart Data

BlueChart g2 and BlueChart g2 Vision charts use graphic symbols to denote map features. Some

common symbols you might see include, but are not limited to, the following:*

Dangerous Rock

Exposed Rock

Beacon

Pilot Boarding Area

Airport/Seaplane Base

Buoy

Anchorage Berth

Precautionary Area

Church

Anchoring Prohibited

Radio Report Point

Exposed Wreck

Recommended Anchorage

Fishing Harbor

Rescue Station

Fishing Prohibited

Tide Station

Information

Yacht Harbor

Current Station

Marine Services

*Some symbols might appear differently on your Garmin unit.

Other features common to most charts include depth contour lines (with deep water represented in

white), intertidal zones, spot soundings (as depicted on the original paper chart), navigational aids

and symbols, and obstructions and cable areas.