Lesson 2: Surface Intervals
Table 2: Surface Interval Time
Whether you choose to dive off a boat or from the beach, you'll probably make more than one dive during the day. But with each dive you complete, the amount of nitrogen you ingas increases.
Divers spend time on the surface between dives, and during this time, nitrogen is offgassed. This increases the amount of time you can spend underwater during consecutive dives.
You use Table 2 to determine how much nitrogen you've offgassed while on the surface. In this lesson, you'll learn how to calculate the reduction in nitrogen levels.
Divers spend time on the surface between dives, and during this time, nitrogen is offgassed. This increases the amount of time you can spend underwater during consecutive dives.
You use Table 2 to determine how much nitrogen you've offgassed while on the surface. In this lesson, you'll learn how to calculate the reduction in nitrogen levels.
Lesson Objectives
After this lesson, you will be able to:
- Define key dive table terms.
- Explain the purpose of a surface interval.
- State the minimum recommended surface interval.
- Determine your new letter group following a specified surface interval.
