Simrad RA771UA, Instruction Manual

Page: 15 / 46

P r e s s
t h e
GZ
key.
T h e
g u a r d zone i s s e t a n d
d i s p l a y e d as a n area bounded by s o l i d l i n e s .
T h e
a n g l e of
t h e g u a r d zone
i s
s e t i n 5.625 d e g r e e i n c r e m e n t s .
To
change t h e g u a r d zone
area,
press
t h e GZ key. The
area
w i l l
change as
45,
90, 180, a n d
360
degree, and move t o
t h e c u r r e n t and EBL
p o s i t i o n .
I f
a t a r g e t t r e s p a s s e s i n t o t h e g u a r d zone, an
a u d i b l e a l a r m sounds ( p i - p i ) . The alarm sounds u n t i l
t h e
GZ
k e y p r e s s e d . If
a
new t a r g e t t r e s p a s s e s i n t o t h e
g u a r d zone, t h e alarm sounds a g a i n .
To e r a s e
t h e
g u a r d zone, p r e s s t h e key more t h a n 3
seconds.
Notes: 1 The zone i s m a i n t a i n e d even i f t h e r a n g e
2 . 1 0
2 . 1 1
2.12
2.13
key
i s
used t o change t h e d i s t a n c e .
e x t e r n a l b u z z e r
(see
5.8).
2 If t h e
powerful
alarm
is r e q u i r e d , i n s t a l l a n
O f f - C e n t e r i n g
t h e s c r e e n m u s t be o b s e r v e d more c l e a r l y
or
w i d e l y .
t h e 60%
backward of
t h e
s c r e e n .
Press
t h e
OFF-C
key once
more.
It w i l l
move t o
t h e
60% f o r w a r d o f t h e screen. And
t h e n , a n o t h e r p r e s s moves t h e p i c t u r e c e n t e r t o t h e c e n t e r
of
t h e
screen.
T h i s f u n c t i o n i s u s e d when t h e p i c t u r e i n an end of
P r e s s
t h e OFF-C k e y .
T h e
p i c t u r e c e n t e r
w i l l
move
R e j e c t i n g I n t e r f e r e n c e f r o m
O t h e r Radars
t h i s f u n c t i o n , r e f e r t o
"2.16 3
S e t u p Modes, S e l e c t e b l e
Key".
2 . 1 1 . 1 What
i s
Radar I n t e r f e r e n c e ?
t h e same frequency band i s o p e r a t i n g n e a r your s h i p . The
form o f
t h e
i n t e r f e r e n c e p a t t e r n i s n o t c o n s t a n t ; it may
be
b r o k e n - l i n e a r c
or
a broken l i n e . S i n c e i n t e r f e r e n c e
echoes vary w i t h e v e r y s c a n p e r i o d , it
i s
e a s y t o
d i s t i n g u i s h i n t e r f e r e n c e p a t t e r n s from normal e c h o e s .
2.11.2
R e j e c t i n g Radar I n t e r f e r e n c e
s t a n d a r d .
E r a s i n g B e a d i n g
M a r k e r
t h i s f u n c t i o n ,
r e f e r t o " 2 . 1 4 S e t u p Modes, S e l e c t a b l e
Key".
u s e t h i s f u n c t i o n t o e r a s e t h e h e a d i n g marker.
S e l e c t i n g D i s p l a y Mode
t h i s
f u n c t i o n , r e f e r t o "2.14 S e t u p Modes, S e l e c t a b l e
Key".
T h i s n o t s e t
t o a
key a s s t a n d a r d . To u s e
Radar i n t e r f e r e n c e may o c c u r when a n o t h e r r a d a r on
The
i n t e r f e r e n c e r e j e c t f u n c t i o n
i s
equipped a s
T h i s f u n c t i o n
i s
n o t
s e t t o a key a s s t a n d a r d . To use
When a t a r g e t i s masked by t h e heading marker l i n e ,
T h i s
f u n c t i o n i s n o t s e t t o a key a s s t a n d a r d . To u s e
When Gyro compass
i s
c o n n e c t e d t o t h e r a d a r , t h e
d i s p l a y mode can be changed t o ;
2 - 8