Furuno TZTL12F Operator's Manual page 5

SAFETY INSTRUCTIONS
WARNING
The ARPA function is a valuable aid
to navigation. However, the naviga-
tor must check all aids available to
avoid collision.
- The ARPA automatically tracks an
automatically or manually acquired
radar target and calculates its course
and speed, indicating them with a
vector. Since the data generated by
the ARPA depends on the selected
radar targets, the radar must be
optimally tuned for use with the
ARPA, to ensure required targets will
not be lost or unnecessary targets,
like sea returns and noise, will not be
acquired and tracked.
- A target is not always a landmass,
reef, ship, but can also be returns
from the sea surface and from clutter.
As the level of clutter changes with
the environment, the operator must
correctly adjust the sea and rain
clutter controls and the gain control so
that the target echoes do not dis-
appear from the radar screen.
Safety Labels
A safety label is attached to the display unit. Do
not remove the label. If the label is missing or
damaged, contact a FURUNO agent or dealer
about replacement.
WARNING
To avoid electrical shock, do not
remove cover. No user-serviceable
parts inside.
iv
Name: Warning Label (1)
Type: 86-003-1011-3
Code No.: 100-236-233-10
CAUTIO CAUTION
The plotting accuracy and response of this
ARPA meets IMO standards. Tracking
accuracy is affected by the following:
Tracking accuracy is affected by course
•
change. One to two minutes is required to
restore vectors to full accuracy after an
abrupt course change. (The actual amount
depends on gyrocompass specifications.)
The amount of tracking delay is inversely
•
proportional to the relative speed of the
target. Delay is approx. 15-30 seconds for
the higher relative speed; approx. 30-60
seconds for the lower relative speed. The
following factors can affect accuracy:
- Echo intensity
- Radar transmission pulse length
- Radar bearing error
- Gyrocompass error
- Course change (own ship and targets)
About the TFT LCD
The TFT LCD is constructed using the
latest LCD techniques, and displays
99.99% of its pixels. The remaining
0.01% of the pixels may drop out or
blink, however this is not an indication of
malfunction.