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The Oxygen Limit Fraction (OLF) has 11 segments, each representing 10%. The
OLF bar graph displays only the value of the higher of the two calculations. When
the OTU value meets and exceeds the CNS value then in addition to displaying its
percentage the lowest segment blinks to indicate that the value shown relates to OTU
(Fig. 3.25.). The oxygen toxicity calculations are based on the factors listed in section
6.3. “Oxygen Exposure”.
3.5. AT THE SURFACE
3.5.1. Surface Interval
An ascent to any depth shallower than 1.2 m [4 ft] will cause the DIVING display to
be replaced by the SURFACE display, giving the following information (Fig. 3.26.):
• maximum depth of last dive in meters [ft]
• present depth in meters [ft]
• no-ying warning indicated by an airplane icon (Table 3.3)
• Altitude Adjustment setting
• Personal Adjustment setting
• Diver attention symbol indicates surface interval time should be prolonged
(Table 3.3)
• STOP label for 5 min, if the Mandatory Safety Stop was violated
• Er, if the decompression ceiling was violated (= Error Mode) (Fig. 3.29, Table 3.3)
• the current temperature with °C for Centigrade [or °F for Fahrenheit]
• dive time of last dive in minutes, shown as DIVE TIME.