Alarm Sound

Alarms and Warnings Sound

When an alarm or a warning is triggered, a sound is played through your device speakers (a short beep for warnings and a siren for alarms). If you prefer the warnings and alarms to remain silent (and just trigger a visual notification in the status bar), you can disable "Warnings and Alarms Sound" from the Alarms settings.

Note that the warnings and alarms sound is using the "Ringer and Alerts" volume that is adjusted from the iOS "Settings" under "Sound & Haptics" (or simply "Sound" under iPads). This allows you to set a specific volume for warnings and alarms, which remains independent from the "media" volume (used for music playback) that is adjusted with the volume buttons on the side of your device. If your device is on "Silent Mode", then, the warnings and alarms will cause your device to vibrate.

Alarm "Text to Speech"

Alarms have the additional option to enunciate themselves (the text of the alarm is spoken in your device languages). This can be enabled or disabled independently from the warnings and alarms sound from the Alarms settings (by adjusting "Enunciate Alarms").

Note that the text to speech is using the "media" volume.

Note: If you play music while using TZ iBoat, and if a warning or an alarm is triggered, the music volume will be temporarily lowered automatically while playing the sound and enunciating the alarm (if enabled). 

Background Processing

To guarantee proper processing of the alarms in TZ iBoat, it is better to leave the App running in the foreground with "Prevent Auto-Lock" enabled from the General settings. This will prevent the device from going automatically in sleep mode and allow TZ iBoat to run continuously and monitor all alarm conditions.

Note: TZ iBoat goes in "low power mode" automatically after 30 seconds of inactivity and reduces the frame-rate to save power consumption.  But, if your device is mounted and used as a primary source of information, it is recommended to connect it to a power source.

Note that TZ iBoat has been designed to keep running in the background when some alarms are enabled or in specific circumstances (for example, when a route is activated). The alarms that will keep TZ iBoat running in the background are:

• Anchor Watch Alarm
• Route XTE Alarm
• Depth Alarm
• Wind Alarm

Note: At this time, the target alarms (CPA/TCPA and Proximity alarms) are not supported in the background.

When one or multiple of these alarms are enabled, TZ iBoat will continue to monitor your position (and NMEA data in the case of Wind and Depth alarms) and check the alarm conditions even if your device is put in sleep mode or if TZ iBoat is not the foreground app anymore. When an alarm is triggered, you will be able to hear the siren sound and then know the type of alarm thanks to the text to speech function (when enabled).

IMPORTANT: The background processing is not guaranteed! When TZ iBoat runs in the background, the iOS operating system will allow less CPU time to TZ iBoat and may even "kill" the app at anytime to reclaim resources if needed. Our internal tests have demonstrated that running TZ iBoat in the background (or putting your device to sleep) with just GPS data while connected to a power source allows TZ iBoat to run reliably in the background for more than 24 hours. That means that the Anchor Watch should run without issue overnight, even if the screen is turned off. HOWEVER, we've also noticed some delay in processing data if TZ iBoat is connected to a Wi-Fi NMEA Gateway with lots of data (GPS, Depth, Wind, AIS,...). In these conditions we've seen the depth alarm or anchor watch alarm with a delay of up to 30 seconds.