Zooming In And Out - NorthStar 972 Quickstart Manual And Reference Manual

A dual-frequency screen is split into two
halves separated by a vertical line in the
center.

Zooming in and out

The echo sounder's zoom feature expands
a portion of the echoes. You can examine
closely any part of the water column to
determine the composition of the bottom
or look at the echoes of fish, rocks, or
wrecks. When fishing, the zoom function is
useful for showing a detailed view of any
echoes below the vessel.
Choosing a zoom mode
Press the Zoom menu key on the
Sounder
zoom modes (or turn the zoom feature off):
The current zoom mode is displayed on
the Zoom key.
For all zoom modes, the original unzoomed
echoes are on the right side, and the
Reference Manual Revision B
screen to cycle through the four
bottom zoom
•
bottom lock
•
bottom lock/center
•
marker zoom
•
When using the zoom feature (which also
splits the screen into halves), both sides of
the screen always display the same
frequency.
magnified area is shown on the left side of
the screen.
Choosing the zoom scale
Press to zoom in and increase the
IN
magnification of the echoes you see below
the top edge of the marker. Press
zoom out and increase the amount of
water seen.
Six depth ranges are available for the
Echo
magnified echoes: 15', 30', 60', 120', 240'
and 480'. Similar scales are available for the
other depth units.
When zoom is in use, only a single
frequency is displayed. Unzoomed echoes
are on the right, and the same frequency is
shown magnified on the left.
You cannot zoom out to a scale that shows
more water than the original picture. For
example, if the original picture is set to a
scale of 50 feet, the only zoom scales
available will be 15 feet and 30 feet.
Reference section 7 — Echo sounding
to
OUT
109

Zooming in and out