NorthStar Echo Sounder 491 Operation Manual page 7

Conventions
491 Echo Sounder Operations Manual
Chapter 4 describes how to adjust the depth settings to choose
what portion of the water under the vessel you'll display.
Chapter 5 explains other functions—the A-Scope, etc.
Chapter 6 describes Northstar's exclusive SoundTrac™ feature,
for accessing past echoes and navigating back to their
locations.
Chapter 7 tells how to use the echo sounder's alarms: the fish
alarm, bottom alarm, and temperature alarm.
At the back of the manual are a glossary and an appendix
outlining the 491's specifications.
Specific conventions are used to provide a consistent way to
recognize certain information, as follows:
• is the universal symbol used for caution and warning
information that pertains to your personal safety or pre-
vents damage to the 491. The
boxes contain critical information—please read them!
• NOTE is the type style used for titles of reader notes. These
notes contain valuable information purposely highlighted
so that you don't miss it while reading the main text.
KEY is the type style used to refer to the menu keys on
•
the display screen.
DISPLAY TEXT is the type style representing text on the
•
display screens.
• A bulleted list contains a series of related items or topics.
• A numbered list contains a series of steps in a procedure.
CAUTION and WARNING
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