Nice way to think about alarms! As a note the tone/type of sound can be changed in the ALM100. The ALM100 also has a LED that illuminate when in alarm. I have one that is mounted under the solon sofa toe kick area and the light illuminates the carpet on the floor. That alarm, for example, is programmed to emit different sounds for an anchor drag than for a bilge pump coming on. As an edit - I also have a separate piezo alarm with LED also located with the ALM100 under the solon sofa that is triggered through the Garmin MFD's; I have found this useful (I sleep better at night) when anchoring in questionable locations and keep the radar operational (MARPA), minimum depth triggering, AIS, etc.