Alarms

Operating System Notifications are used for various alarms in the app.

Alarms are used for AIS collision alerts, DSC or AIS distress signals, and you can set alarms based on your distance from a mark.

In the System Settings app, you can choose to disable all notification. In this case, the alarm text simply pops up on the map at the top of the screen.

Mark Proximity / Anchor Alarm

You can set an alarm on a Mark, and get a notification when you approach that point (Proximity Alarm), or when you stray to far from it (Anchor Alarm).

Use of this feature requires the Memory-Map Professional license. Sign in to activate your Professional license, or use a free 10 day demo period for evaluation.

Create a Mark, Tap the drop-down menu (or right-click), and Edit the mark. When you enable the alarm, you can set the Anchor and the Proximity alarm distance separately. To set a Proximity alarm, leave the Anchor alarm distance at zero.

When you set an anchor alarm, typically you don't want the alarm to go off when you are a long distance from that point. So if you enter an Anchor alarm distance and leave the Proximity alarm distance at zero, the app automatically suppresses the alarm when you are double the distance plus 1km from the point. You can change this behavior by entering a different Proximity alarm distance.

The Anchor alarm radius must be smaller than the Proximity alarm radius. The alarm zone is actually the annulus between the two.

Alarm Notification

When the alarm goes off, the app displays a system notification, and plays a sound. You can dismiss the notification by tapping it. The notification is automatically dismissed when the alarm condition ends (eg, you move out of the area).

The notification is continuously updated, giving the name of the mark causing the alarm, and your distance from it. If you have an Apple Watch or similar device, it displays the updated notification text.

Next: Connecting to Marine Instrumentation