Off-Centering - Furuno FR-2105 Operator's Manual

Deactivating guard alarm
Hold the [2] key depressed for at least 5 seconds on the FUNCTION 1 menu. In the IMO type,
deactivation of TAZ 1 deactivates TAZ 2. TAZ 1 and 2 work independent in the Regular type.
Note: The echo watch alarm is given to targets having a certain level of echo strength. This
level does not always imply a landmass, reef, ships or other surface objects but can mean
returns from the sea surface or precipitation. Properly adjust the GAIN, A/C SEA, and A/C
RAIN controls to reduce noise to avoid generation of an alarm against false target.
Inward and outward guard alarms
On the R-type, an inward or outward guard alarm can be selected on the RADAR 2 menu. On
the IMO type, only the inward guard alarm is available. The inward guard alarm generates
visual and audible warnings when a target enters the guard zone from any direction. The
outward guard alarm is produced when a target leaves the guard zone (This is not a guard
zone by definition but some users find this feature valuable).
(a) Inward guard (b) Outward guard
alarm available on
IMO and R-types

1.21 Off-Centering

Own ship position, or sweep origin, can be displaced to expand the view field without
switching to a larger range scale. The sweep origin can be off-centered to the cursor position,
but not more than 75% of the range in use; if the cursor is set beyond 75% of the range scale,
the sweep origin will be off-centered to the point of 75% of the limit.
This feature is not available on the longest range scale. The number of range rings increases
keeping the original range intervals unchanged.
To off-center the radar picture:
1. Place the cursor at a position where you wish to move the sweep origin by operating the
trackball.
2. Press the OFF CENTER key. Then, the sweep origin is off-centered to the cursor position.
3. To cancel off-centering, press the OFF CENTER key again.
The picture cannot be off-centered in the true motion mode.
alarm available on
R-type only
-1.25-