Furuno FR-2125V Operator's Manual page 42

1.25.6 Setting CPA/TCPA alarm ranges
When the predicted CPA of any target becomes smaller than a preset CPA alarm range
and its predicted TCPA less than a preset TCPA alarm limit, the EPA releases an aural
alarm and displays the warning label COLLISION on the screen. In addition, the EPA
symbol changes to a triangle and flashes together with its vector.
Provided that this feature is used correctly, it will help prevent the risk of collision by alert-
ing you to threatening targets. It is important that GAIN, A/C SEA, A/C RAIN and other
radar controls are properly adjusted.
CPA/TCPA alarm ranges must be set up properly taking into consideration the size, ton-
nage, speed, turning performance and other characteristics of own ship.
To set the CPA/TCPA alarm ranges:
1. Press the [PLOT MENU] key to show the EPA menu.
2. Press the [2] key to select COLLISION ALARM ON. At this point, a highlight cursor
appears at the "CPA x.x NM" field.
3. Enter the CPA alarm range in nautical miles (0.0 to 9.9 nm) without omitting leading
zeroes, if any, and press the [ENTER] key. The highlight cursor now moves to the
"TCPA xx.x MIN" field.
4. Enter the TCPA alarm limit in minutes (1.0 to 99.0 minutes) without omitting leading
zeroes, if any, and press the [ENTER] key.
5. Press the [PLOT MENU] key to close the menu.
1.25.7 Silencing CPA/TCPA audible alarm
Press the [AUDIO OFF] key to acknowledge and silence the CPA/TCPA audible alarm.
The warning label COLLISION and the flashing of the triangle plot symbol and vector
remain on the screen until the dangerous situation is gone or you intentionally terminate
tracking of the offending target by using the [TARGET CANCEL] key.
CAUTION
The CPA/TCPA alarm feature should
never be relied upon as the sole means
for detecting the risk of collision. The
navigator is not relieved of the responsi-
bility to keep visual lookout for avoiding
collisions, whether or not the radar or
other plotting aid is in use.
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