13
o
Vertical
Sometimes referred to as a “Showdown” display, this one is very easy to
interpret—top is the top, bottom is the bottom. Anything in between
the top and bottom is weeds, fish, or your lure.
o
Vertical Zoom
Same as Vertical, but allows for a magnified view of a selected portion
of the water column. The ZOOM window can be adjusted by entering
SETTINGS to change your preferences. (
See Zoom; pg. 14
)
o
Flasher
This Sonar window will read much like a traditional flasher-style display.
Signals are displayed as various colored lines on the dial, and the
different colors represent different signal strengths.
Sonar Functions
Once the style of sonar has been selected, the following adjustments can be made by first pressing
SETTINGS in the upper right corner of the screen, and once the menu bar appears on the left, selecting
Marcum Sonar [if using more than one sonar module, each module can be adjusted separately].
o
RANGE
– The Marcum RT-9 has nine different fixed ranges, as well as the ability to create
custom ranges using the Dynamic Depth features. Pressing the RANGE button in the SONAR
SETTINGS menu will open up a sub-menu with four different range options.
AUTO
– Selecting AUTO will put the RT-9 into a “search mode” where it will detect the
bottom and automatically lock into one of the nine fixed ranges [10, 20, 40, 60, 80, 120,
180, 240, and 300]. This is a feature that allows you to simply turn on the unit and begin
fishing. To enter Auto Range, select RANGE, and then highlight “Auto” and the RT-9 will
automatically lock into the appropriate depth range. For instance, in 32 feet of water,
the RT-9 will lock into the 40 foot range. In 45 feet of water the RT-9 will automatically
lock into the 60 foot range.
MANUAL
– Selecting MANUAL will allow the user to decide which fixed range is
displayed. Select RANGE, then MANUAL, and use the arrows to move to the desired
depth range.
DYNAMIC
– This Marcum exclusive feature functions similarly to the “Auto Range”, but
fine tunes your range setting even farther. The Dynamic Depth will maximize the space
on your display by utilizing a variable range that will always be just slightly deeper than
the actual depth. For example, if you were fishing in 23 feet of water, the Dynamic
Depth feature will automatically create a custom range of 0 - 26 feet. Similarly, if you
were in 29 feet of water, the Dynamic Depth range will be 32 feet. The Dynamic Depth
range will not go shallower than 10 feet.
MANUAL DYNAMIC
– This function allows the user to select the depth range. For
instance, say you start out in AUTO range and you quickly learn that the water is 21 feet
deep. The AUTO range will have selected the 0-40 foot range. To fine tune your display,
