5
66 NAUI Nitrox Diver
Verify What You Have Learned
Review the following questions about
Dive Tables and Dive Computers:
1. NAUI’s standard EAN32 and EAN36 Dive Tables are
based off of what? NAUI RGBM tables?
2. What is the tolerance of the NAUI Nitrox Dive
Tables?
3. What is the required surface interval between two
separate dives? What is the recommended minimum
surface interval?
4. The NAUI Nitrox Dive Tables are designed to be
used at sea-level atmospheric pressure. Adjustments
must be made for altitudes above what level?
5. If flying or ascending to altitude after diving, how
long must you wait after a single dive? After a series
of repetitive dives?
6. What are some of the advantages of using the NAUI
RGBM Tables?
7. Equivalent air depth (EAD) is determined by what?
8. Using the Equivalent Air Depth table, what is the
equivalent air depth for a diver descending to 33
msw (100 fsw) while breathing EAN35?
9. Explain how to calculate equivalent aIr depth.
10. When following the Rule of Halves, what depth do
you make your first safety stop? You make a final
one-minute stop at what depth?
11. What is an advantage of using a dive computer?
For answers, see Appendix.
Professionals Leading the Way
As a scuba diver, each dive is predicated on
who leads and who follows. Diving knowledge,
skill and ability are what set leaders apart from
their dive buddies, groups or affiliations. NAUI
is where diving professionals are made and
scuba is defined. NAUI professionals enhance
diving’s definition by turning their certifications
into careers.
Lamar Hires (1956-present)
Lamar Hires began diving in 1979 in the North
Florida springs convenient to his home. Spring
diving lured him to the mysteries of their caves.
While armed with Sheck Exley's new Basic
Cave Diving text as his guide, Hires began
what was to be a lifelong career in underwater
caving, exploration, techniques, equipment
design and manufacture, and safety.
When in the early 1980s it became obvious
that the usual scuba gear was not adequate
for the challenges of the cave environment,
Hires and fellow cavers like Wes Skiles and
Woody Jasper began to design and make gear
for cave use. Hires was one of the first to use
sidemount equipment to navigate low passages.
He was also one of the first cave divers to use a
backplate, modifying the design to his needs.
Hires became a NAUI Instructor in August 1984
and an NSS-CDS Instructor that November.
That same year, Hires and Mark Leonard
started Dive Rite to manufacture and sell
gear. The company's first products included a
backplate, harness, reels, a canister light, and
assorted hardware.
His explorations and gear testing have taken
Hires to many countries including Australia,
Finland, Italy, Japan, and Russia. He is
passionate about cave safety, instruction and
passing knowledge on to other divers.