This chapter includes the following lessons:

In this lesson, you'll learn how to use Table 1 to determine maximum depth and time limits for a day's first dive.

This lesson will teach you how to use Table 2 to calculate your new nitrogen level following the time you spent at the surface.

In this lesson, you'll learn how to use Table 3 to determine the maximum depth and dive time for your second or third dive of a day.

Dive computers are a popular alternative to dive tables. In this lesson, you'll learn about the benefits of computers, rules concerning their use, and typical display modes.