Garmin GPS 175 Pilot's Manual page 188

Hazard Awareness
POWER LINE OBSTACLES
OBSTACLE
OBSTACLE GROUPS
With the exception of power lines, obstacles within close proximity of each other
may display as a group.
Asterisk indicates that the obstacle belongs to a group
•
Relative altitude of the highest obstacle determines color
•
• Depiction is of the most immediate threat
5-36
POWER LINE OBSTACLE LOCATION
Red power line is above or within 100 ft below current
altitude.
Yellow power line is between 100 ft and 1,000 ft below
current altitude.
White power line is between 1,000 ft and 2,000 ft below
current altitude.
GPS 175/GNX 375 Pilot's Guide 190-02207-02 Rev. 1