You completed the decompression stop.

The decompression stop depth and time flash blue for five seconds.

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

Your PO2 value flashes yellow.

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.

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

None

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

None

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

The alert appears again when you have 5 minutes of NDL time remaining.

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

None

Less than 10% battery power remains.

The alert appears when the watch is below 10% battery power and on the dive pre-check screen for your next dive.

Less than 20% battery power remains.

The alert appears when the watch is below 20% battery power and on the dive pre-check screen for your next dive.

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

The watch marks the gas as a backup and updates decompression guidance accordingly.

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.

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.

You completed all decompression stops.

None

You are more than 0.6 m (2 ft.) above the decompression ceiling.

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.

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

The current depth and stop depth flash yellow.

The PO2 of the diluent gas is too low, and filling the rebreather breathing loop with the diluent gas may be dangerous.

None

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

None

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

Do not start a dive. Call Garmin^® Product Support.

The watch 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.

You have exceeded your NDL time.

The watch begins providing decompression stop guidance.

You selected Never when prompted to switch to a higher-oxygen gas.

The watch marks the gas as a backup and updates decompression guidance accordingly. It will no longer prompt you to switch to the gas.

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 or switch gases.

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.

You completed the safety stop.

None

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

The safety stop countdown timer begins, if configured.

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.

The watch automatically switched to your specified CCR high setpoint.

None

The watch automatically switched to your specified CCR low setpoint.

None

The watch is in pool dive mode.

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

The watch rebooted during the dive.

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