SSI Open Water Diver Chapter 4 Flashcards

Questions and Answers

What does a good diving buddy do?

Makes diving more fun, is familiar with their buddy's diving equipment, and is able to help in all phases of diving and dive planning.

What does a dive computer help a diver to keep track of?

Nitrogen absorption levels.

What should you do if you lose contact with your buddy?

Search for no more than a minute by turning 360 degrees and looking up and down, then perform a normal ascent to the surface.

What should dive buddy teams do when entering the water through the surf?

Maintain physical contact and time entry to coincide with the lull between wave sets. Signup and view all the answers

What is the most important reason for planning your dives?

To prevent accidents. Signup and view all the answers

What steps should be taken when selecting a dive site?

Consider the purpose of the dive, degree of difficulty presented by the site, and honest evaluation of your and your buddy's diving abilities. Signup and view all the answers

You should perform a safety stop at 15 ft for 3-5 mins on every dive.

True Signup and view all the answers

How is the No-decompression Limit defined?

The max allowed time at depth without having to perform a mandatory decompression stop during ascent. Signup and view all the answers

What is the surface interval in diving?

The amount of time the diver stays out of the water or on the surface between dives. Signup and view all the answers

How are rip currents formed?

Water breaks over sand bars and reefs near the beach and recedes through channels in them. Signup and view all the answers

Why is the use of the SSI Total Dive Log important?

It contains your medical history, provides important emergency information, and keeps an accurate record of your personal information and dives. Signup and view all the answers

What is residual nitrogen?

The amount of excessive nitrogen dissolved in our bloodstream and tissues after a dive. Signup and view all the answers

How do you use a compass to navigate to a sighted object?

Point the compass toward the object, rotate the bezel until the witness marks are over the magnetic needle and follow the lubber line. Signup and view all the answers

Is it okay to share a computer with your dive buddy?

False Signup and view all the answers

What is the recommended maximum ascent rate?

30 ft/min Signup and view all the answers

Why are dive computers essential for planning and executing dives?

They record all pertinent information, help divers stay within the no-decompression limits, and monitor ascents and descents. Signup and view all the answers

Study Notes

Diving Safety and Buddy System

A good diving buddy enhances the experience, is familiar with each other's gear, and assists in all aspects of diving.
Maintaining physical contact and timing entry during surf is crucial for buddy teams.

Dive Planning

Planning dives prevents accidents; it's essential to execute dives according to plan.
When selecting a dive site, consider the purpose, difficulty, personal skills, and those of your buddy.

Dive Equipment and Techniques

A dive computer tracks nitrogen absorption, helping divers stay within no-decompression limits.
Use a compass for navigation by aligning it with the target object and adjusting as needed.
Sharing a dive computer with a buddy is not permitted.

Safety Procedures

In case of losing contact with a buddy, search for one minute, looking around before ascending normally.
Perform a safety stop at 15 feet for 3-5 minutes on every dive to enhance safety.

Diving Physiology

The No-decompression Limit is the maximum time allowed at a depth without needing a mandatory stop during ascent.
Surface interval refers to the time spent out of the water between diving sessions.
Residual nitrogen is the excess nitrogen remaining in the bloodstream and tissues post-dive, which affects subsequent dives.

Environmental Awareness

Rip currents are created when water retreats through channels in sandbars and reefs after breaking waves.

Documentation

The SSI Total Dive Log is vital for recording medical history, emergency info, and personal dive records, serving as a resource for future dives.

Ascent Guidelines

The recommended maximum ascent rate to ensure safety is 30 feet per minute.
Dive computers are crucial tools for logging information, monitoring dives, and assisting in safe ascent/descent practices.

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Description

Test your knowledge with these flashcards from Chapter 4 of the SSI Open Water Diver course. Each card covers essential diving concepts, including buddy dynamics and dive computer functions. Perfect for reinforcing your understanding of safe diving practices.