Dive Bezel vs GMT Bezel

Dive bezel (60-minute, unidirectional)

• Rotates only counter-clockwise.
• Aligned with the minute hand at the start of a dive.
• Tracks elapsed bottom time.
• One-way design ensures any accidental knock shortens dive time, never lengthens it (safer).

GMT bezel (24-hour, bidirectional)

• Bidirectional rotation.
• Used with a 24-hour GMT hand to track a second (or third) time zone.
• Often two-tone (Pepsi, Batman, Root Beer) split day/night.

Don't use a dive bezel for time tracking on a flight — the unidirectional click pattern is awkward. Don't trust a GMT bezel underwater — it could rotate accidentally.