Icom iC-M605 Instruction Manual page 89

D CPA/TCPA
In this menu, you can edit alarm settings for the AIS receiver.
• Alarm
You can turn the collision alarm function ON or OFF.
• Slow Warn
The GPS receiver calculated COG data of a vessel that is at
anchor or drifting is unreliable, and therefore the CPA and
TCPA data may not be calculated correctly. If a vessel is
anchored in your alarm zone, the unreliable data can cause
the collision alarm to sound many times, even if there is no
real danger. To prevent this, when the anchored vessel's
SOG is less than this set value, the Slow Warn function
assumes that vessel's COG is fixed towards your vessel and
an alarm will sound.
z Rotate [CH/ENT] or push [Y]/[Z] to set the value between
0.1 and 4.9 kt (in 0.1 kt steps), or select OFF. (default: 1.0 kt)
NOTE: If other vessels at anchor or drifting come into your
alarm zone, the Slow Warn alarm will sound again. Only if
the previous vessel disappears from the Danger List
(p. 74), and then re-enters the list, can a new Slow Warn
or regular alarm sound, depending on the vessels SOG,
or CPA and TCPA. The Slow Warn function operates in
the same way if your vessel is at anchor and other vessels
enter your alarm zone area.
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