SSI Open Water Final Exam- 2026/2027
Edition – 50 Questions with 100% Verified
Correct Answers
50 Questions with Step-by-Step Answers | 100% Verified | A+ Graded Review
OVERVIEW:
SSI Open Water Final covers essential dive theory, safety, equipment, and physiology. It tests
buoyancy, equalization, pressure laws, decompression, nitrogen absorption, and emergency
procedures. Mastery ensures safe, responsible diving, environmental awareness, buddy system
discipline, ascent control, and proper use of computers and tables for confident open water
diving. Preparation prevents panic, injury, and builds lifelong underwater confidence worldwide
for divers.
Answers are in bold Green, with rationales after.
1. The term Surface Interval is defined as:
A. The time spent at safety stop depth
B. The maximum time allowed at depth
C. The amount of time a diver stays out of the water or on the surface between
dives
D. The time between entering the water and starting descent
Rationale: Surface Interval is critical for off-gassing residual nitrogen. It determines
your residual nitrogen time for your next repetitive dive.
2. The most serious lung over expansion injury is:
A. Pneumothorax
B. Mediastinal Emphysema
C. Arterial Gas Embolism
D. Subcutaneous Emphysema
Rationale: Arterial Gas Embolism (AGE) occurs when expanding air bubbles enter the
arterial bloodstream and block blood flow to the brain. It is the most serious and can be
fatal within minutes.
3. Diving at altitude or flying after diving:
, A. Has no effect on decompression
B. Is safe immediately after diving
C. Requires special diving computer functions, altitude tables and/or refraining
from flying for at least 24 hours after the completion of a dive
D. Only requires drinking more water
Rationale: At altitude or in an airplane cabin, atmospheric pressure is lower, which
increases the pressure gradient and risk of Decompression Sickness from residual
nitrogen. SSI recommends minimum 18-24 hours no-fly time.
4. If a diver is injured by harmful sea life, it is usually because of:
A. The diver's negligence
B. All answers are correct
C. The diver's ignorance
D. The diver's aggressive behavior
Rationale: Most marine life is defensive, not aggressive. Injuries are almost always
preventable and caused by divers touching, harassing, or failing to recognize hazardous
organisms.
5. Which of the statements concerning sound transmission
underwater is correct:
A. Divers find it difficult to locate the direction of a sound producing source
B. All answers are correct
C. Sound will travel farther underwater than in air
D. Sound travels four times faster underwater than in air
Rationale: Sound travels ∼4.3 times faster in water (∼1500 m/s) than in air. Because it
reaches both ears almost simultaneously, the brain cannot determine direction, and it
travels much farther due to water density.
6. Panic can be prevented by:
A. Taking specialty training
B. Honestly evaluating your diving limitations
C. Properly maintaining your Total Diving System
D. All answers are correct
Rationale: Panic is the #1 cause of diver accidents. Proper training, equipment
maintenance, and staying within your comfort and ability limits are all key preventive
measures.
7. Use of the SSI Total DiveLog is important because:
A. All answers are correct
B. It keeps an accurate record of your personal information and dives
C. It contains your medical history and provides important emergency information
D. It is important information resource for future dives
Rationale: The DiveLog serves as your personal dive record, proof of experience,
medical emergency info, and a planning tool for future repetitive dives.
8. An object immersed in water will be buoyed upward by a
force ____ the weight of the water it displaces.
A. Less than
B. Greater than
Edition – 50 Questions with 100% Verified
Correct Answers
50 Questions with Step-by-Step Answers | 100% Verified | A+ Graded Review
OVERVIEW:
SSI Open Water Final covers essential dive theory, safety, equipment, and physiology. It tests
buoyancy, equalization, pressure laws, decompression, nitrogen absorption, and emergency
procedures. Mastery ensures safe, responsible diving, environmental awareness, buddy system
discipline, ascent control, and proper use of computers and tables for confident open water
diving. Preparation prevents panic, injury, and builds lifelong underwater confidence worldwide
for divers.
Answers are in bold Green, with rationales after.
1. The term Surface Interval is defined as:
A. The time spent at safety stop depth
B. The maximum time allowed at depth
C. The amount of time a diver stays out of the water or on the surface between
dives
D. The time between entering the water and starting descent
Rationale: Surface Interval is critical for off-gassing residual nitrogen. It determines
your residual nitrogen time for your next repetitive dive.
2. The most serious lung over expansion injury is:
A. Pneumothorax
B. Mediastinal Emphysema
C. Arterial Gas Embolism
D. Subcutaneous Emphysema
Rationale: Arterial Gas Embolism (AGE) occurs when expanding air bubbles enter the
arterial bloodstream and block blood flow to the brain. It is the most serious and can be
fatal within minutes.
3. Diving at altitude or flying after diving:
, A. Has no effect on decompression
B. Is safe immediately after diving
C. Requires special diving computer functions, altitude tables and/or refraining
from flying for at least 24 hours after the completion of a dive
D. Only requires drinking more water
Rationale: At altitude or in an airplane cabin, atmospheric pressure is lower, which
increases the pressure gradient and risk of Decompression Sickness from residual
nitrogen. SSI recommends minimum 18-24 hours no-fly time.
4. If a diver is injured by harmful sea life, it is usually because of:
A. The diver's negligence
B. All answers are correct
C. The diver's ignorance
D. The diver's aggressive behavior
Rationale: Most marine life is defensive, not aggressive. Injuries are almost always
preventable and caused by divers touching, harassing, or failing to recognize hazardous
organisms.
5. Which of the statements concerning sound transmission
underwater is correct:
A. Divers find it difficult to locate the direction of a sound producing source
B. All answers are correct
C. Sound will travel farther underwater than in air
D. Sound travels four times faster underwater than in air
Rationale: Sound travels ∼4.3 times faster in water (∼1500 m/s) than in air. Because it
reaches both ears almost simultaneously, the brain cannot determine direction, and it
travels much farther due to water density.
6. Panic can be prevented by:
A. Taking specialty training
B. Honestly evaluating your diving limitations
C. Properly maintaining your Total Diving System
D. All answers are correct
Rationale: Panic is the #1 cause of diver accidents. Proper training, equipment
maintenance, and staying within your comfort and ability limits are all key preventive
measures.
7. Use of the SSI Total DiveLog is important because:
A. All answers are correct
B. It keeps an accurate record of your personal information and dives
C. It contains your medical history and provides important emergency information
D. It is important information resource for future dives
Rationale: The DiveLog serves as your personal dive record, proof of experience,
medical emergency info, and a planning tool for future repetitive dives.
8. An object immersed in water will be buoyed upward by a
force ____ the weight of the water it displaces.
A. Less than
B. Greater than
