Minimum Required Surface Interval
Table 2: Surface Interval Time
The divers had a letter group of "D" following their first dive, and we want to find the minimum surface interval required to give them a letter group designation of "B."
To determine the minimum required surface interval, find the required letter group on the left side of the table and follow that row to the right until you locate the column for the diver's end-of-dive letter group, which was "D." And we can see that the divers need a surface interval of at least 2 hours and 39 minutes to make their planned repetitive dive.
To determine the minimum required surface interval, find the required letter group on the left side of the table and follow that row to the right until you locate the column for the diver's end-of-dive letter group, which was "D." And we can see that the divers need a surface interval of at least 2 hours and 39 minutes to make their planned repetitive dive.
