Scuba Diving Fundamentals, Exams of Nursing

Download Scuba Diving Fundamentals and more Exams Nursing in PDF only on Docsity! PADI Open Water Diver actual solution As a newly certified PADI Open Water Diver, I will be trained to dive with a buddy as deep as ________. - answer ✅✅18 metres/60 feet Certain medical conditions can be hazardous while diving, so it is important to answer all questions on the Medical Statement honestly and completely. a. True b. False - answer ✅✅a. True PADI courses are performance-based. This means that to be certified, I must ________ - answer ✅✅meet specific performance requirements. Failure to complete assigned independent study can create significant delays, and my instructor may have to cancel and reschedule sessions until I complete the assignment. a. True b. False - answer ✅✅a. True While diving in a new dive environment, two benefits of seeking an orientation, supervision and/or additional training are that it helps me avoid problems and that it helps me enjoy the dive more. a. True b. False - answer ✅✅a. True As you descend in water the pressure ________ - answer ✅✅increases A depth of 10 metres/33 feet causes a pressure change of ________. - answer ✅✅1 bar/ata If you take 6 liters of air from the surface to 20 metres/66 feet, the volume will be ________. - answer ✅✅2 litres The density of the air in 6 litres from the surface to 20 metres/66 feet is ________ - answer ✅✅three times greater My body responds to anxiety with increased breathing, but slow breathing helps reduce anxiety. a. True b. False - answer ✅✅a. True What are the breathing rules I must follow as a diver? - answer ✅✅- Breathe continuously and never, ever, hold my breath - Breathe slowly and deeply - Do not allow myself to get winded or out-of-breath - If faced with a problem, stop, then maintain or restore slow, deep breathing Buoyancy is a force that pushes an object in water upward. a. True b. False - answer ✅✅a. True My sunglasses case falls out of my pocket into the water, but fortunately, it floats so I retrieve it. I would say my sunglasses case is ________ buoyant. - answer ✅✅positively Salt water causes more buoyancy than fresh water because it is less dense and weighs less. a. True b. False - answer ✅✅b. False Salt water causes more buoyancy because it is more dense and weighs more; buoyancy results from the weight of the water displaced To control my buoyancy, normally I will use my weight system and my ________ - answer ✅✅BCD When I descend, my buoyancy tends to ________. When I ascend, it tends to ________. - answer ✅✅decrease, increase Underwater, when I inhale, my buoyancy ________ - answer ✅✅increases slightly It is important to master buoyancy control because it affects almost everything I do in and underwater. a. True b. False - answer ✅✅a. True In recreational diving, the buddy system means diving with another diver or divers in a team that provides assistance and safety benefits. a. True b. False - answer ✅✅a. True Overall benefits of the buddy system include ________ - answer ✅✅practicality, safety and fun The three most important considerations in choosing scuba equipment are suitability, fit and ________ - answer ✅✅comfort Getting the service my gear needs may be a consideration when choosing equipment. a. True b. False - answer ✅✅a. True Before each use, I should ________ my equipment. - answer ✅✅inspect I need a mask because ________ - answer ✅✅my eyes must be in air to focus My mask encloses my nose so I can ________ - answer ✅✅equalize the mask From among masks that fit me, I should choose a mask that fits as far away from my face as possible. a. True b. False - answer ✅✅b. False Choose a low profile that sits as close to your face as possible I want to adjust my mask so the strap rests ________ - answer ✅✅above my ears, over the crown of my head Although the components are generally interchangeable, choosing your scuba kit as a package helps you best meet your preferences Inflatable Bladder - answer ✅✅very durable bag that you inflate or deflate to change your buoyancy Cylinder band and harness/jacket - answer ✅✅The bladder integrates with an adjustable harness that holds the cylinder on your back. The bladder may be entirely behind you, or wrap partially around your waist and/or over your shoulders. With some systems, you can interchange harnesses and bladders to accommodate sizing and preferences. LPI (low-pressure inflator) mechanism - answer ✅✅Usually at the end of a large-diameter hose, the LPI inflates the bladder with air from your cylinder, via the regulator, when you press a button. Another button allows you to deflate the bladder, or inflate it orally. Overpressure/quick exhaust valves - answer ✅✅to prevent rupturing the bladder due to overfilling, BCDs have one or more overpressure valves that automatically vent if the BCD is too full. Some may have "quick dump" valves that let you manually release air, which is sometimes easier (due to your position in the water) that using the LPI exhaust. Shoulder quick release - answer ✅✅a quick-release buckle on one or both shoulders makes it easier to get out of your kit Buoyancy Capacity - answer ✅✅Most BCDs cover a wide range of diving circumstances. Your BCD should have ample buoyancy to easily float you and all your equipment at the surface. You sometimes hear the amount of buoyancy called "lift" capacity. The LPI mechanism inflates the BCD with air from my scuba cylinder. a. True b. False - answer ✅✅a. True My BCD should have adequate capacity to easily float my equipment and me at the surface. a. True b. False - answer ✅✅a. True My BCD should fit ________ - answer ✅✅snugly but not restrict breathing when fully inflated My buddy is rinsing a BCD and partially fills the bladder with water. Is this consistent with recommended BCD care? - answer ✅✅yes Submersible Pressure Gauge (SPG) - answer ✅✅tells you the air pressure remaining in your cylinder so you can manage your air supply Alternate Air Source - answer ✅✅an extra second stage you use for sharing air with a buddy should the need arise Pony Bottles - answer ✅✅small cylinders with their own regulators, so they're completely separate from your main scuba kit Second Stage - answer ✅✅reduces the first stage intermediate pressure to the pressure around you and delivers air only when you inhale - on demand First Stage - answer ✅✅hub of your regulator that is a simple and reliable device that supplies air to all the other components Yoke - answer ✅✅holds the first stage to the cylinder with a clamp system The most important consideration when choosing a regulator is ________ - answer ✅✅ease of breathing When choosing an alternate air source, a primary consideration involves deciding ________ - answer ✅✅between independence and simplicity My SPG is always part of my dive computer. a. True b. False - answer ✅✅b. False Accessory weights ________ - answer ✅✅can help you adjust your trim Underwater objects appear ________ - answer ✅✅larger and/or closer My buddy has a bright red shoulder patch on his wet suit. If we're diving together in very clear water on a sunny day, at 12 metres/40 feet I would expect the patch to appear ________ - answer ✅✅less red than at the surface Because water is denser than air, it takes more effort to move through water. a. True b. False - answer ✅✅a. True To move efficiently as a dive, I should move ________ - answer ✅✅slowly and steadily Streamlining benefits me as a diver because it reduces drag, which helps me save energy. a. True b. False - answer ✅✅a. True Trim is important for streamlining because ________ - answer ✅✅poor trim raises or lowers my feet, causing drag Water's density works best for me when I use the skill of ________ - answer ✅✅controlling my buoyancy I chill faster in water than in air of the same temperature because water absorbs more heat than air does. a. True b. False - answer ✅✅a. True To stay comfortably warm during a dive, I ________ - answer ✅✅wear an appropriate exposure suit After 30 minutes underwater, I start to feel a bit too cool and uncomfortable. I should ________ - answer ✅✅end the dive While diving, I start to feel cool and shorty being to shiver uncontrollably. I should ________ - answer ✅✅end the dive immediately, dry off and seek warmth While scuba diving, I should breathe ________ - answer ✅✅slowly and deeply One method of airway control is to inhale slowly. I can also ________ to help breathe past small amounts of water in my regulator. - answer ✅✅raise my tongue If I'm tired, have labored breathing and feel air-starved and anxious during a dive, it is likely I am experiencing overexertion. a. True b. False - answer ✅✅a. True Overexertion results from ________ - answer ✅✅a prolonged increased effort If I think I'm overexerting while underwater, I should stop, signal my buddy and ________ - answer ✅✅rest My buddies and I are planning a dive. Among other things, we should address how to enter and exit the water, the maximum depth and time, when to turn the dive and what to do if we get separated. a. True b. False - answer ✅✅a. True As my buddy and I kit up, the normal practice is to be entirely independent. Helping each other is discouraged. a. True b. False - answer ✅✅b. False Buddies normally help each other. How much you assist each other depends on the situation. When I conduct a predate safety check, the "A" in the recall phase includes ________ - answer ✅✅confirming adequate air pressure for the dive Five steps you follow when you descend are ________ - answer ✅✅1. Confirm that your buddies are ready 2. Orient yourselves to something at the surface or underwater, such as the boat or a landmark 3. Switch from your snorkel to your regulator 4. Check, and if necessary activate, your dive computer or timer 5. Signal "descend" and, with your buddies, slowly deflate your BCD I'm descending in open water with my buddies. After confirming they are ready, the next step is to signal "descend" and slowly deflate my BCD. a. True b. False - answer ✅✅b. False You orient yourself, switch to your regulator and check your dive computer or timing device before deflating your BCD When descending with a reference, I would normally ________ - answer ✅✅use it as a visual reference only My buddy and I have just started our descent. I begin equalizing ________ - answer ✅✅immediately, as soon as my head goes underwater As I descend while wearing a wet suit, my buoyancy will tend to ________ - answer ✅✅decrease During my descent, to control my buoyancy I add air to my BCD ________ - answer ✅✅in small amounts, frequently Five steps you follow when you ascend are ________ - answer ✅✅1. Signal "up" and confirm that your buddies are ready 2. Check your dive computer to be sure you're within its limits 3. Look up and hold up your BCD deflator hose. 4. Ascend slowly, no faster than 18 meters/60 feet per minute but 10 meters/30 feet per minute is better 5. Look up and turn as you ascend, and stay with your buddies. Watch for obstacles overhead. Reach up as you near and break through the surface A safety stop is ________ - answer ✅✅a simple pause in your ascent between 6 meters/20 feet and 3 meters/10 feet (commonly 5 meters/15 feet) for three to five minutes Before starting my ascent, I should check my dive computer to be sure I'm within its limits. a. True b. False - answer ✅✅a. True To start my ascent, I should ________ - answer ✅✅swim up gently When I'm ascending, I should ascend ________ - answer ✅✅slowly - no slower than 18 meter/60 feet per minute I'm ascending from a dive during which I'm wearing a wet suit. My buoyancy will ________ as I ascend, unless I adjust it with my BCD. - answer ✅✅increase To control my buoyancy while ascending, I should ________ - answer ✅✅vent my BCD in small amounts frequently I would never find it necessary to ascend without a reference. a. True b. False - answer ✅✅b. False You may have to ascend away from a planned reference due to losing direction or to handle an emergency or problem. A safety stop is between ________ and ________ for three to five minutes. - answer ✅✅6m/20ft, 3m/10ft When I reach the surface, the first thing I do is ________ - answer ✅✅inflate my BCD Skin suits (body suits) - answer ✅✅wear them in comfortably warm water to protect you from minor cuts, scrapes, stings and sunburn I wear an exposure suit while diving for ________ - answer ✅✅protection and warmth Thermometer - answer ✅✅help you determine how much exposure protection you need If I am using dive tables instead of a dive computer, I will need a dive timer and depth gauge. a. True b. False - answer ✅✅a. True It's a sunny day and I'm on a boat with no shade. It would be a good idea to cover my gear, including instruments, with a towel. a. True b. False - answer ✅✅a. True Snorkel Clearing - answer ✅✅blow the water out forcefully, like using a pea-shooter (blast method) Popular dive environments include ________ - answer ✅✅coral reefs, temperate water oceans, lakes and reservoirs, rivers, springs, flooded quarries and human-made dive environments Six general conditions that effect you during a dive are ________ - answer ✅✅temperature, visibility, water movement, bottom composition, aquatic life and sunlight Visibility ranges from ________ to ________ - answer ✅✅0 to more than 200 feet Silt/mud - answer ✅✅clay, fine organic/inorganic material or mud Sand - answer ✅✅larger, coarser particles Rock - answer ✅✅gravel and larger rock Coral - answer ✅✅living and dead coral in tropical water Vegetation - answer ✅✅various plants and algae found in both fresh and salt water I can enjoy diving in many different aquatic environments that include coral reefs, flooded quarries and human-made dive environments. a. True b. False - answer ✅✅a. True In most (but not all) environments, as I go deeper the water gets ________ - answer ✅✅colder Although somewhat subjective, I measure visibility as how far I can see ________ underwater - answer ✅✅horizontally Particles made of fine material affect visibility by ________ - answer ✅✅remaining suspended for long periods When diving in reduced visibility, it's a good idea to descend and ascend with a reference. a. True b. False - answer ✅✅a. True When diving in clear water, I don't have to worry as much about staying close to my buddy. a. True b. False - answer ✅✅b. False In clear water, you may get too far from your buddy because you can still see each other. As a rule of thumb, stay within two seconds of each other. The two types of water motion that most affect me as a diver are waves and current. a. True b. False - answer ✅✅a. True When diving in a mild current, normally I want to begin my dive ________ the current. - answer ✅✅headed into If I were caught in a current and carried downstream past my planned exit, I should swim ________ the current. - answer ✅✅across While planning a dive, my buddy (who is not an instructor) suggests that we dive significantly deeper than I have either training or experience with. My best response is to ________ - answer ✅✅politely say "no" and purpose a depth limit appropriate for my limits Those that sting and/or puncture make up the largest group, which include ________ - answer ✅✅jellyfish, portuguese man-o- war, lion fish and scorpion fish, stingrays, sea urchins, cone shells, fire coral and other hydroids, and sea nettles Aquatic organisms that bite include, but are not limited to ________ - answer ✅✅moray eels, trigger fish, crocodilians, some sharks (not all), barracuda and other fish, snakes (venomous bite), octopuses (a few species have a venomous bite), clawed lobsters/crab (pinchers, not a true bite) The type of interaction I should generally have with aquatic life is ________ - answer ✅✅passive Potentially hazardous aquatic animals are, broadly, those that ________ and those that ________ - answer ✅✅sting/puncture and bite Nearly all injuries from aquatic life result from ________ - answer ✅✅human carelessness I should be familiar with potentially hazardous organisms that may be in the local environment, where I would find them and how they could harm me. a. True b. False - answer ✅✅a. True I can learn more about handling aquatic life injuries (and other emergencies) in the PADI Rescue Diver and Emergency First Response Primary Care (CPR) and Secondary Care (First Aid) courses. a. True b. False - answer ✅✅a. True While underwater near a kelp forest, my buddy and I see a large shark approach. We should ________ - answer ✅✅remain calm, near the bottom and watch it Laws and regulations about aquatic life exist to preserve and protect organisms, and also for human safety. a. True b. False - answer ✅✅a. True One potential hazard of some plants and kelp is ________ - answer ✅✅entanglement Project AWARE involves me and other divers as part of a movement to help keep our clean and full of healthy, abundant marine life. a. True b. False - answer ✅✅a. True When wading into water while shore diving, the general procedure is to put my fins on in water about knee deep, then walk backward until I can swim. a. True b. False - answer ✅✅b. False The general procedure is to wade until your BCD can support you - about chest deep - then put your fins on. ________ and ________ generally determine the best way to wade in and out or how soon I put my fins on. - answer ✅✅bottom composition and aquatic life When shore diving, I always have long surface swim before descending and after descending. a. True b. False - answer ✅✅b. False How far you swim before descending and/or after descending varies with the dive site Surge - answer ✅✅Back-and-forth motion caused by waves passing overhead. The bigger the waves, the stronger the surge and the deeper it affects you. Rip currents - answer ✅✅result when waves push water over a long obstruction (such as a reef or sandbar) The bridge (wheelhouse) - answer ✅✅The portion of the boat where the controls are; often elevated for visibility. Head - answer ✅✅The boat's toilet facilities or the boat's commode specifically. Galley - answer ✅✅The boat's kitchen/cooking area (in some areas, most larger dive boats have gales; in others, few do) Swim step - answer ✅✅A platform on the stern that is close to water level. You commonly enter and exit the water there. While packing my gear bag for the boat dive, I want to pack it so ________ - answer ✅✅what I need first is on top It is recommended that I avoid excessive alcohol the night before a dive, or before any day of diving. a. True b. False - answer ✅✅a. True While on a boat, I begin to feel seasick, but I don't feel like I am going to be sick. The best place to go is ________ - answer ✅✅into fresh air, close to the water level in the center of the boat A roll call (or other method to verify everyone is aboard before leaving each dive site) is important for my safety. a. True b. False - answer ✅✅a. True It is important to secure my equipment on a boat in rough conditions, but it is not important in calm conditions. a. True b. False - answer ✅✅b. False secure your equipment even in calm conditions because an unexpected wave (a passing boat's wake, for example) may cause it to fall and injure someone, break something or fall overboard Generally, if i hear the dive boat's recall signal, I shoul ________ - answer ✅✅surface with my buddy where we are and look to the boat for instructions It's a good idea to avoid walking with fins on any more than I must. a. True b. False - answer ✅✅a. True My buddy and I are diving and there is a slight current. When we reach the bottom, we want to swim ________ the current for the first part of the dive. - answer ✅✅into While making a safety stop at the end of a dive, I notice that some loose line has snagged on the boat propeller, and could severely entangle it when the engine starts. I should ________ - answer ✅✅stay away from the propeller and report the problem to the crew I don't want to swim just below the surface because ________ - answer ✅✅boats can't see me, and could hit me I have just exited the water onto a boat by climbing a ladder with all my gear on expect fins. Once aboard, first I should ________ - answer ✅✅sit down as soon as possible, or have someone help me out of my kit My buddy and I are boat diving with a mild current. After entering, we would use the ________ line to pull ourselves to the ________ line, which we will descend along the bottom. - answer ✅✅swim, mooring/anchor During a boat dive in mild to moderate current, my buddy and I lose our grips on the mooring line as we are coming up. We should ________ - answer ✅✅surface and swim across the current to reach the trail line My buddy and I surface and discover that the boat is nowhere in sight. We are beyond sight of shore and there is no mooring buoy or anchored float. We should ________ - answer ✅✅inflate our BCDs, use our surface signaling devices and wait for pick up Four stages of dive planning are ________ - answer ✅✅advance planning, preparation planning, last-minute planning, and predive planning My buddy doesn't move while floating at the surface, so I tap my buddy's shoulder. My buddy signals "okay." I should disregard this signal and assume my buddy is unresponsive. a. True b. False - answer ✅✅b. False A diver who responds to communication is not unresponsive When assisting an unresponsive diver at the surface, if I find the victim isn't breathing, I should ________ - answer ✅✅provide rescue breaths To prevent and control underwater problems, I should ________ - answer ✅✅relax while I dive, plan my air use, dive within my limits While diving, I begin to feel air-starved because I have been swimming hard. I should ________ - answer ✅✅signal "stop" and rest To breathe from a free flowing regulator, I should hold the second stage ________ - answer ✅✅with the mouthpiece pressed against my lips If I were to become entangled underwater, I should ________ - answer ✅✅stop, think and work to free myself During a dive, I find I am running low on air sooner than expected. My buddy and I are still several minutes from our planned point, but I am almost at reserve pressure. We should ________ - answer ✅✅ascend immediately where we are Although it shouldn't have happened, on a dive I fail to watch my SPG and run out of air. I don't have a pony bottle or self- contained ascent bottle. My buddy is close at hand - less than two seconds away, and has an alternate second stage. My best option is probably to ________ - answer ✅✅ascend using an alternate air source If I am bringing an unresponsive diver to the surface and the victim becomes too buoyant to control, I should stay with the victim even if our ascent is too fast. a. True b. False - answer ✅✅b. False You should let the victim go, complete your ascent at the safe rate, and resume the rescue at the surface A diver who is or was unresponsive may have which of the following signs and symptoms? - answer ✅✅difficulty breathing, unconsciousness, cardiac and respiratory arrest, chest pain My first priority when assisting someone who is or was unresponsive is to contact emergency medical care and to ________ - answer ✅✅be sure the person is breathing A diver who was unresponsive is breathing. Nonetheless, I should check breathing frequently while waiting for emergency medical care. a. True b. False - answer ✅✅a. True A diver who was unresponsive underwater has become fully responsive, is fully alert and shows no apparent further problems. The diver still requires medical examination. a. True b. False - answer ✅✅a. True At a minimum, I should have ________ visual and ________ audible surface signaling devices. - answer ✅✅1, 1 The visual signaling device that I might use to signal an aircraft is ________ - answer ✅✅signal mirror Alpha flag - answer ✅✅blue-white pennant, and indicates that the vessel flying it has divers in the water and can't maneuver Traditional dive flag - answer ✅✅Red rectangle with a white diagonal stripe. Indicates there are divers below and boats should keep clear. One possible use for a surface float is to use it to assist another diver. a. True Typical space parts kits might have ________ - answer ✅✅spare mask strap, fin strap and snorkel keeper, harness/weight belt buckle, cable ties, adjustable wrench, pliers, screw driver, regulator mouthpiece, accessory clip, slate/wet book pencil, various sized cylinder valve/DIN valve o-rings Diving can be physically demanding, so I should be in good health and reasonably fit. a. True b. False - answer ✅✅a. True It is recommended that I have a complete physical examination when I start diving and regularly thereafter. a. True b. False - answer ✅✅a. True Factors that can strain my heart in diving include ________ - answer ✅✅swimming hard, carrying equipment, climbing a ladder, heat stress If I may be predisposed to heart disease, I should consult my doctor so I can assess and manage the risk as a diver. a. True b. False - answer ✅✅a. True Before diving, I should refrain using ________ and ________ - answer ✅✅alcohol, tobacco Before using prescribed or over-the-counter medication, if I am not sure how they will affect me diving, I should consult my physician. a. True b. False - answer ✅✅a. True The best way to keep my dive knowledge and skills current and refreshed is to ________ - answer ✅✅use them by diving regularly As a new PADI Open Water Diver, I should refresh my dive skills with a PADI ReActivate after ________ of inactivity - answer ✅✅six months Continuing my diver education helps keep my skills and knowledge sharp by ________ - answer ✅✅allowing me to visit new dive sites, increasing my opportunities to dive, expanding the types of diving I do, introducing me to new buddies I can dive with The four issues in diving that relate to the component gases in air are ________ - answer ✅✅oxygen toxicity, decompression sickness, contaminated air, gas narcosis Air consists of oxygen and ________ - answer ✅✅nitrogen Air is ________ percent oxygen - answer ✅✅21 percent If I dive within recreational limits using air, I avoid the problems associated with oxygen being toxic or causing fire/combustion issues. a. True b. False - answer ✅✅a. True As a PADI Open Water Diver, I should not dive with a cylinder labeled "oxygen" or known to have 100 percent oxygen. a. True b. False - answer ✅✅a. True Enriched air nitro can have oxygen issues. To avoid these, I should become qualified to dive with enriched air in the PADI Enriched Air Diver course, or be under the supervision of a PADI Enriched Air Instructor. a. True b. False - answer ✅✅a. True Possible causes of contaminated air include ________ - answer ✅✅getting a cylinder filled at an improper source, improper maintenance of the filling system, very high levels of contaminant in the source gas-more than the filters can keep out A diver breathing contaminated air my have signs/symptoms of ________ - answer ✅✅headache, nausea, dizziness, unconsciousness/unresponsiveness, cherry-red lips/fingernail beds A no stop dive means I can, if necessary, ascend directly to the surface without stopping ________ the dive - answer ✅✅at any time during A no stop limit is the maximum time I can spend at a given depth and still ascend directly to the surface. a. True b. False - answer ✅✅a. True If I stay longer than a no stop limit, I must ________ - answer ✅✅make an emergency decompression stop If I am planning a dive to 18 meters/60 feet, my no stop limits will be ________ than my no stop limits for a dive to 12meters/40 feet - answer ✅✅shorter While at 18 meters/60 feet, my computer says I have 40 minutes no stop time remaining. My buddy and I ascend to 10 meters/30 feet. Our computers will show our no stop time is ________ - answer ✅✅longer Ascending faster than the required ascent rate of my computer or table may increase my risk of DCS. a. True b. False - answer ✅✅a. True If i were to skip ________ stop, I would surface outside model limits and have a high risk of decompression sickness. - answer ✅✅an emergency decompression Nitrogen left in your body after a dive is ________ - answer ✅✅residual nitrogen A dive made while you still have residual nitrogen is ________ - answer ✅✅repetitive dive Time you spend at the surface between two dives is ________ - answer ✅✅surface interval A repetitive dive is a dive made while I still have theoretical residual nitrogen in my body. a. True b. False - answer ✅✅a. True On a repetitive dive, for a known depth my no stop limits will be ________ those of the first dive - answer ✅✅shorter than After a surface interval, the nitrogen dissolved in my body will ________ - answer ✅✅decline My dive computer only calculates while I am underwater. It doesn't do anything between dives. a. True b. False - answer ✅✅b. False your dive computer continues to calculate until your theoretical nitrogen levels return to normal I must use the same dive computer the entire day of diving, on all dives, and not share it with another diver. a. True b. False - answer ✅✅a. True Dive tables like the RDP and eRDPml use ________ tables to calculate repetitive dives - answer ✅✅3 The four advantages that made dive computers far more popular are ________ - answer ✅✅easier to use than tables, help offset human error, give you more time underwater, have other features to record your dive Practically all dive computers provide this information before, during and/or between dives ________ - answer ✅✅no stop (no decompression) limits, depth, elapsed time, no stop time remaining, ascent rate, emergency decompression, previous dive information The first step in setting up my dive computer is to ________ - answer ✅✅read the manufacturer instructions During a dive with my dive computer, my buddy and I will turn the dive based on the first limit we reach: remaining no stop time or air supply turn point. The difference between flying after diving and altitude diving is that when flying after diving, I go to altitude after a dive, and in altitude diving, I begin and end a dive at altitude. a. True b. False - answer ✅✅a. True My buddy and I have made two no stop dives a day for the last two days. Based on current recommendations, we should wait at least ________ after our last dive before flying. - answer ✅✅18 hours Flying after diving recommendations may change over time, so I should check online and print sources to keep up with and follow the most current ones. a. True b. False - answer ✅✅a. True When diving at an altitude of ________ or higher, I need to use altitude diving procedures. - answer ✅✅300 meters/1000 feet Cold and/or strenuous dives may be a problem with respect to DCS risk because - answer ✅✅I may end the dives with more dissolved nitrogen than calculated by dive computer or tables If I'm cold or exert myself strenuously during a dive, I should ________ - answer ✅✅be even more conservative Using the RDP Table or eRDPml, I should calculate a cold or strenuous dive as - answer ✅✅4 meters/10 feet deeper than the actual depth If I go over a no stop limit, I ________ - answer ✅✅will have to make one or more emergency decompression stops The depths and times of emergency decompression stops are ________ - answer ✅✅given by my dive computer If I surface without making an emergency decompression stops, I should get a fresh cylinder of air and then go back underwater to make the stop. a. True b. False - answer ✅✅b. False If you miss an emergency decompression stop, relax, breathe emergency oxygen and monitor yourself for DCS symptoms, and don't dive for at least 24 hours The term "decompression illness" ________ - answer ✅✅includes both lung over expansion injuries and DCS Treatment for most cases of DCI requires ________ - answer ✅✅recompression in a chamber Signs and symptoms of gas narcosis are ________ - answer ✅✅feeling intoxicated, loss of coordination, slowed thinking, slowed reactions, inappropriate laughter, depression, false sense of security, ignoring or disregard for safety, anxiety and/or panic Gas narcosis is thought to be harmful itself. a. True b. False - answer ✅✅b. False Gas narcosis is not thought to be harmful itself. Then hazard is that it impairs the good judgement, clear thinking and timely responses you need to avoid and manage problems underwater Gas narcosis is thought to be caused by the increased amount of dissolved gases in body tissues slowing nerve impulses that travel in the brain and nervous system. a. True b. False - answer ✅✅a. True Most divers usually begin to notice gas narcosis at a depth of approximately ________ - answer ✅✅30 meters/100 feet Before a dive, I feel a bit tired. This may make narcosis ________ - answer ✅✅noticeable at a shallower depth If I am diving and begin to feel intoxicated, I should ________ - answer ✅✅signal my buddy to ascend to a shallower depth The five benefits of navigating underwater are ________ - answer ✅✅helps you plan your dive so you don't waste air trying to find the best parts of the dive site, allows you to avoid long