Obstruction alarm (legacy LightHouse charts)
The Obstruction alarm provides a warning if a charted object, charted depth contour or charted height clearance is detected that conflicts with the MFD’s configured Safety depth and / or Safety height settings.
The Obstruction alarm requires Legacy LightHouse™ vector charts as the alarm’s Cartography source.
Object depths, depth contours and clearance heights are based on the cartography in use.
If an obstruction is not present in the specified Cartography source it will not trigger the alarm.
Obstruction alarmAlarmsObstructionWhen the Obstructions alarm is triggered an alarm notification is displayed and an audible beep is sounded on the MFD. From the onscreen notification you can acknowledge the alarm by selecting OK, or edit the alarm parameters by selecting Edit.