NAUI RGBM sea level dive tables can be utilized for altitudes up to what level?

NAUI RGBM sea level dive tables are designed to accommodate conditions that can be found at sea level and up to certain altitudes. They are specifically validated for use at altitudes up to 1,000 feet. This means that dives conducted at sea level or at elevations that do not exceed 1,000 feet are appropriate for using these tables without significant adjustments.

When diving at elevations higher than 1,000 feet, the tables may not accurately account for the changes in ambient pressure, which can affect nitrogen absorption in the body. This is why it's crucial for divers to adhere to altitude limits set by the diving tables to ensure safe diving practices. Thus, the option of 1,000 feet is the correct threshold for utilizing NAUI RGBM sea level dive tables effectively.