889AIS RECEIVER (Depending on versions)12345678910111213141516• Slow WarnThe GPS receiver calculated COG data of a vessel that is atanchor or drifting is unreliable, and therefore the CPA andTCPA data may not be calculated correctly. If a vessel is an-chored in your alarm zone, the unreliable data can cause thecollision alarm to sound many times, even if there is no realdanger. To prevent this, when the anchored vessel’s SOG isless than this set value, the Slow Warn function assumes thatvessel’s COG is fixed towards your vessel and an alarm willsound.q Rotate dial or push [Y]/[Z] to input the value between 0.1and 4.9 kt (in 0.1 kt steps), or select OFF. (default: 1.0 kt)w Push [ENT] to save and return to the Menu mode.NOTE: If other vessels at anchor or drifting come into youralarm zone, the Slow Warn alarm will sound again. Only ifthe previous vessel disappears from the Danger List (p.82), and then re-enters the list, can a new Slow Warn orregular alarm sound, depending on the vessels SOG, orCPA and TCPA. The Slow Warn function operates in thesame way if your vessel is at anchor and other vesselsenter your alarm zone area.• CPA, TCPAEnter CPA (Closest Point of Approach) and TCPA (Time toCPA) values.These settings help you find a dangerous target to avoid acollision. The icon blinks on the plotter display and/or thealarm buzzer sounds, when the AIS target is closer than yourCPA and TCPA settings.q Rotate dial or push [Y]/[Z] to select either “CPA” or“TCPA.”• CPA or TCPA setting menu is displayed.w Rotate dial or push [Y]/[Z] to input the value into thatitem.• CPA: Between 0.1 and 6.0 nm (in 0.1 nm steps)(default: 1.5 nm)• TCPA: Between 1 and 60 minutes (in 1 minute steps)(default: 20 min)e Repeat steps q and w to input the value into the otheritem.r Push [ENT] or dial to save and return to the Menu mode.When the CPA settingmenu is selected.When the TCPA settingmenu is selected.