The following functions are already integrated in the OSTC:

Surface:

Display after start:

• Graphic display of 16 tissues and their saturation (separated by nitrogen and helium)
• Display of remaining time for complete desaturation
• Display of date, time, battery level, serial number and firmware version
• Air pressure
• Temperature

Menu:

• Logbook
• Gas Setup
• Time settings
• Reset
• Custom functions

Underwater:

Display:

• Current depth (large)
• Dive time (large)
• Maximum depth (normal)
• No deco limit / decompression information (normal)
• Temperature (small)
• Additional information depending on the situation, p.e. vertical velocity, gradient factor, gas setup

Reduced underwater menu:

• Overview of decompression stops
• Change gases
• Display setup

LEDs:

• Symbol for battery status (red): blinks when battery level is low, or when battery is being charged
• Symbol for USB-activity (blue)
• Symbol for no fly (blue)
• Symbol for warnings (yellow)
• Symbol for status display (green)
  
• Configurable accustic alarm