Dive Alerts

None

You completed the decompression stop.

The decompression stop depth and time flash.

None

Your partial pressure of oxygen (PO2) value is above the specified warning value.

Your PO2 value flashes yellow.

%1 OTU accumulated.

Your oxygen toxicity units are above the safe limit. During a dive, “%1” is replaced with the number of units accumulated.

The alert appears every two minutes, up to three times.

250 OTU accumulated.

Your oxygen toxicity units (OTU) are at 250 units, and you are nearing the safe limit of 300 units.

None

5 minutes to NDL.

You have 5 minutes of no decompression limit (NDL) time remaining.

None

10 minutes to NDL.

You have 10 minutes of no decompression limit (NDL) time remaining.

None

Approaching deco stop.

You are within one stop interval (3 m or 9.8 ft.) of the decompression stop depth.

None

ASCEND OR SWITCH GAS PO2 is high.

Your PO2 value is above the specified critical value.

Your PO2 value flashes red. The alert appears every 30 seconds, up to three times, until you ascend to a safe level.

Battery is low.

Less than 20% battery power remains.

The alert appears when the dive computer is below 20% battery power.

Continuing on %1. Switch at any time.

You selected Not Now when prompted to switch to a higher-oxygen gas, or you ignored the prompt.

The gas does not change. You will be prompted again in two minutes.

CNS toxicity at 80%.

Your central nervous system (CNS) oxygen toxicity is at 80% of the safe limit.

The alert appears during a dive and on the dive pre-check screen for your next dive.

CNS toxicity at %1%.

Your CNS oxygen toxicity is too high. During a dive, “%1” is replaced with your current CNS percentage.

The alert appears every two minutes, up to three times.

Decompression cleared.

You completed all decompression stops.

None

DESCEND OR SWITCH GAS
PO2 is low.

Your PO2 value is below 0.18 bar.

If you are within the first two minutes of your dive, your PO2 value flashes yellow.
Otherwise, your PO2 value flashes red.
The alert appears every 30 seconds, up to three times, until you descend to a safe level or switch gases.

DESCEND TO %1
You are above your deco ceiling.

You are more than 0.6 m (2 ft.) above the decompression ceiling. During a dive, “%1” is replaced with the depth you should descend to.

The current depth and stop depth flash red. If you remain above the decompression ceiling for more than three minutes, the decompression lockout feature goes into effect.

Descend to complete safety stop.

You are more than 2 m (8 ft.) above the safety stop ceiling.

The current depth and stop depth turn yellow.

Dive will end in %1 seconds.

The dive computer will automatically end and save the dive. During a dive, “%1” is replaced by the number of seconds.

None

Do not dive. Failed to read depth sensor.

The dive computer has invalid or missing depth sensor data before you start a dive activity.

Do not start a dive. Call Garmin Product Support.

EVALUATE DIVE CONDITIONS
Dive computer was rebooted.

The dive computer rebooted during the dive.

The dive computer simulates the dive for the time it was rebooting. Since other alerts may not have been triggered, evaluate your current depth and dive conditions.

NDL exceeded. Deco required.

You have exceeded your NDL time.

The dive computer begins providing decompression stop guidance.

SAFELY END DIVE Battery critically low.

Less than 10% battery power remains.

The alert appears when the dive computer is below 10% battery power.

SAFELY END DIVE Dive computer error.

The computer encountered an issue that it could not recover from.

Use a backup dive computer or dive plan and end your dive. Residual tissue loading was cleared. If the issue continues, call Garmin Product Support.

SAFELY END DIVE Failed to read depth sensor.

The dive computer has invalid or missing depth sensor data after you have started a dive activity.

Use a backup dive computer or dive plan and end your dive. Call Garmin Product Support.

Safety stop cleared.

You completed the safety stop.

None

Safety stop started.

You ascended above 6 m (20 ft.) without other decompression guidance.

The safety stop countdown timer begins, if configured.

SLOW YOUR ASCENT Ascending too fast.

You are ascending faster than 9.1 m/min. (30 ft./min.) for more than 5 seconds.

None

Switch to %1 now?

In a multi-gas dive, a gas with a higher oxygen content is now safe to breathe.
During a dive, “%1” is replaced with the name of the gas.

You can switch gases now, or wait to switch gases later in the dive. A confirmation message for your choice appears.

This pool dive will not be saved to the dive log.

The dive computer is in pool dive mode.

The dive computer will not save the current dive to the dive log.