Menuschangedepending
on
themodethe
unitisin. For
example, lithe Very
smallfishprobably
willnotarch atall. Mediumsized fish willshow
automaticmodeisturned
off,
the
sensitivity menuchanges
from"AUTO
SENS"
to"MAN
SENS."Other
messages mayappear
inmenuboxesor
new menus canappear, againdepending on
previous selections.
OPERATION
AUTOMATIC
WhentheMagna II isfirstturned on, the
automatic featureisenabled. This feature
automatically adjuststheunit's range and
sensitivity according towaterconditions. It
alwayskeeps
thebottom depth displayedin
thelower
portion
ofthescreen.
Toturntheautomatic feature
off, press the
menu key until theAUTO/MANmenu ap-
pears.Nowpress
thedownarrowkey. This
highlights
theletters"MAN." Theunitisnow
in
themanual mode.Waita
fewsecondsand
themenuwillscrolloffthescreen's left
side. ____________________
Pressing theON/CLEAR keyalsoclears it.
Toturntheautomaticleature
onagain,repeattheabove
steps,exceptthis
timepress theuparrow key.
a partial arch, or ashapesimilar to an arch ifthey'rein deepwater.
Large
fishwillarch, butturnthe
sensitivityup
in
deeper
watertoseethe
arch. Because of water conditions, such as heavy surface clutter,
thermoclines, etc., the sensitivity sometimes cannot be increased
enough toget
fisharches.
One of the bestways to get fish arches is to expand or "zoom" a
segment
ofthewater. For
example, from45to60feet. Thesmallerthe
segment,thebetterthescreenresolutionwillbe. Theeasiestwaytodo
thisonthe
Magna
IIiswiththeZoomfeature. Thisfeatureexpands
the
echoes, making it easierto seedetail. Forthebestresults, turnthe
sensitivity upas highaspossible without
getting toomuchnoiseonthe
screen. Inmedium todeep water,thismethod shouldworktodisplay
fisharches.
Ifyouseefishsignalswhentheunitisinthemanualmode, butdon't
get
fishsymbols whentheFish1.0.featureison,tryincreasingthesensitiv-
ity
RANGE WATER
TEMPERATURE ANDTHERMOCLINES
Youcan'tadjust
the
rangewhentheMagna IIisin theautomatic mode.
Itisadjustable whentheunitisin
themanual
mode,
however. Todoso,
firstput
theunitin
themanualmode. Nowpress
theON/CLEAR
keytoclearthescreen.
Then
pressthe
menu
keyuntilthe"RANGESEL"menuappearsas
shown. The current range shows at the
bottomofthemenu. Inthiscase,
the
range
is60feet. Nowpresstheuparrowkeyto
decreasethe range, thedown arrow key
increasesthe range. After you selectthe
desired range,press
theON/CLEAR keyto
clearthe
display. Ifyouwaitafewseconds,
itwillautomatically clear.
Watertemperature has an important-if not controlling-influence upon
the activities of all fish. Fishare cold blooded and their bodies are
always
thetemperature ofthesurrounding water. Duringthewinter,
colderwater slows down their metabolism. At this time, they need
about afourthas much foodastheyconsume in
thesummer.
Mostfish don't spawn unless thewatertemperature is within rather
narrow
limits. Thesurface temperature meterbuiltintothe
Magna
Plus
helps identify thedesired surface water spawning temperatures for
variousspecies. Trout can't survivein streams that get toowarm.
Bass and otherfisheventually
dieoutwhenstockedinlakesthatremain
toocoldduring
thesummer. Whilesomefish haveawider
temperature
tolerance
than others,
eachhas acertainrangewithin whichittriesto
stay. Schooling fish suspended overdeepwaterlieatthe levelthat
provides thistemperature. We assume theyare themost comfortable
here.
IJTO
MAN
373FT 't
6 23
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