
GRAYLINP
GRAYLINE® lets youdistinguish between strong
andweakechoes. It
"paints" grayontargets
thatarestronger thanapreset
value. This
allows youtotellthedifference between ahardandsoftbottom. For
example, asoft,muddy orweedy bottom returnsaweaker
signal
whichisshownwithanarrow or nograyline. Ahardbottom
returnsa
strongsignalwhich
causesawide grayline.
If
youhavetwo
signals ofequal size, onewithgrayandtheother
without,
thenthe
targetwith gray
isthestrongersignal. This helps
distinguish weedsfromtrees onthebottom, or fishfromstructure.
NORTHEAST U.S.LORAN-c CHAIN GRI9960
REGIONAL MANAGERCOMMANOER, ATLANTICAREA. NEWYORK,NY
CHAIN MANAGER COMMANDER,
ATLANTICAREA, NEWYORK, NY
COORDINATOR OFcHAINOPERATIONS LOCATION:LORSTASENECA, NY
CONTROLSITE:LORSTASENECA, NY
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GRAYLINE®is
adjustable. Since GRAYLINE® showsthedifference
between strong
and weak
signals, adjusting Sensitivitymayrequirea
differentGRAYLINE®level, also. Thelevel
chosen
by the Ultraat
power
onisusually adequate formost conditions. Experiment
with
yourunittofindtheGRAYLINE®
setting
that'sbestforyou.
GRAYLINE®—
q3jFT ---20
4-c Sc
Toadjust
GRAYLINE®,
press theSENS
key. Thesensitivity menu
appears intheupperleft
sideofthedisplay, whiletheGRAYLINE®
switchlabelappears immediately beneath it. First
pressthe
key
adjacent
tothe"SENS GRAY" label. This
changes
thesensitivity
adjust
menutoGRAYLINE®adjust. Nowpress
thekeyadjacent
to
the
up
arrowtoincrease thegraylevel. Pressthekeyadjacent
tothe
downarrow todecrease it. Thepercentage ofGRAYLINE® inuse
changes asthearrow keys are pressed. Thebarchartalsogivesa
graphical indicationoftheGRAYLINE® level. You can seethe
change onthescreen (bothonthemenuandonthechartrecord)
as
96 9
a
'r
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