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    3) You are a 'L' diver. How long do you need to wait to be able to dive 110 feet for 10 minutes?

    On Table 3, move right on the 110 foot row until you find at least 10 minutes in blue - the 'B' column.

    On Table 2, move right on the 'L' row until you get to the 'B' column. The top number is the minimum surface interval: 1 hour and 22 minutes.