The first step in using your dive computer is ❑ setting the time and date. reading the manufacturer’s instructions. calibrating it for enriched air nitrox. setting it for fresh or salt water.
How do you use a dive computer?
How to use Student Dive Computers ** Wrist Computers – YouTube
When planning a dive with a computer I use the?
Refer: Using Dive Computers and Tables I – Planning Dives with Your Computer. With most dive computers, you scroll depths in 3meters increments, displaying maximum time allowed per depth. Thus, you plan dives with your dive computer by activating it and scrolling the no stop limits.
When making a series of dives should you do your first?
For example, if you do a dive to 18 meters (60 feet), but spend most of the time at 12 meters (40 feet), you must consider the dive to be an 18 meter (60 foot) dive. Always make your deepest dive first when making a series of dives. Plan each of your repetitive dives to a shallower depth than your previous dive.
How does a dive computer watch work?
A dive computer takes depth and time information and applies it to a decompression model to track the dissolved nitrogen in your body during a dive. … Your computer combines a depth gauge, timer and sometimes a submersible pressure gauge (SPG) into a single, useful instrument.
Do you need a dive computer?
For many people, an ascent rate monitor may be the most important reason to buy a dive computer. Every diver – and even none-divers – knows the dangers of coming up too quickly, and every diver does all they can to keep within the safe limits.
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How do you read a dive gauge?
Dive Gauge Guide – YouTube
What is the first thing I should do with an injured diver at the surface?
What is the first thing you should do with an injured diver at the surface? Make the diver float, and check to see if the diver is breathing.
When planning a dive with a computer I use the plan or no stop Scroll to determine?
The scrolling mode is used to determine your adjusted maximum dive time for a specific planned depth.
When planning a dive in cold water or under strenuous conditions I should plan the dive?
ascend directly to the surface, but don’t exceed 18 metres/60 feet per minute. 34. In cold water or under strenuous conditions, plan your dive as though it were: D a. 4 m/10 ft shallower than actual.
How long can you scuba dive at 60 feet?
What is the No Decompression Limit for 60 feet? The NDL or No-Stop time for 60 feet / 18 meters is 56 minutes according to the Recreational Dive Planner table. On a Suunto dive computer using their algorithm, the NDL is 51 minutes for your first dive.
How long can you scuba dive at 15 feet?
Make a Safety Stop
Safety stop diving gives your body extra time to release excess nitrogen that builds up in your system during the dive. Deep technical dives commonly require deeper and longer decompression stops, but three to five minutes at 15 feet is standard for recreational dives within no stop dive limits.
When using a dive computer I should send at a rate not faster than?
five minutes or less, slowly ascend at a rate not faster than 18 metres/60 feet per minute to 5 metres/15 feet and remain there for eight minutes prior to surfacing. After reaching the surface, do not dive for at least six hours because you will have extremely high levels of residual nitrogen in your body.
What is a personal dive computer?
A dive computer, personal decompression computer or decompression meter is a device used by an underwater diver to measure the elapsed time and depth during a dive and use this data to calculate and display an ascent profile which according to the programmed decompression algorithm, will give a low risk of …
What is a Console dive computer?
A console allows you to check your depth, dive time, remaining dive time, heading (if you have a compass), remaining gas in your tank, and possibly more all at a single glance on the same unit. …
What is the difference between a dive computer and a dive watch?
A dive computer is the smartwatch of the diving world. It is still designed to do a similar thing – to keep track of time and avoid decompression sickness – but where the dive watch is intended to be used every day, with any outfit, this is a purpose-built device. Dive watches vary in size and sophistication.
Can you dive with Apple Watch 5?
According to Apple’s specifications page, Apple Watch Series 5 has a water resistance rating of 50 meters (164 feet), and can be used for “shallow-water activities like swimming in a pool or ocean.” It’s not suitable for “scuba diving, waterskiing, or other activities involving high-velocity water or submersion below …
How do submersible pressure gauges work?
Air pressure pushes against a diaphragm which in-turn pushes against the oil-filled tube, causing the coiled tube to expand like a filled garden hose. The tube end is attached to a fixed lever that turns the indicating needle which then indicates pressure on a graduated dial.
What is an SPG in scuba diving?
SPG (Submersible Pressure Gauge)
Know how much air is left in the tank. A SPG can be separate or built into a dive computer and are made in both analog and digital.
What is gauge pressure in scuba diving?
Gauge pressure is a measurement that ignores the atmospheric pressure (atm—pressure of the air pushing down). At sea level with no added pressure, gauge pressure is zero, and underwater, your submersible pressure gauge will show 10 meters/33 feet at a depth of 10 meters/33 feet.
What do you do when you see a diver on the surface face down?
Call to the diver and splash them with water. If no response – you can assume that they are unresponsive. As they are face down they could be breathing (if they are breathing) from the reg or worse they could be mouth open in the water.
Why do divers have to Make stops while ascending to the surface?
Safety stops significantly slow down a divers ascent to the surface, which allows time for the excess nitrogen that has accumulated in our blood and tissue to dissolve out of our bodies.
What happens when the regulator begins to free flow?
Scuba Skill – How to Handle a Freeflowing Regulator – YouTube
What is the ABC pre dive check?
The pre-dive safety check ensures that your equipment is working, and also familiarizes you with your buddy’s equipment should you need to assist or receive assistance from him. It even lets you check if your buddy’s gear is working correctly, and if you’ve turned on your air supply.
What happens if you fail Padi exam?
It is a pass/fail exam. If you get below 75% you will have to return to a later IE to retake the whole written exams section. … If you fail in 2 or more sections, or you fail the retake, you will have to attend a later PADI Instructor Exam and repeat all written exams again.
How long is PADI theory?
This includes interactive presentations, video, audio, graphics and reading, along with short quizzes to gauge your progress. The eLearning portion takes around 12-15 hours to complete.
What is the difference between DIN valves and yoke valves?
First, what is the difference between them? The yoke is a clamp-type mounting, which is placed over the tank valve and then tightened into place. The DIN is a threaded valve, wherein you screw the regulator into the tank valve. … On the DIN, it is placed on the regulator first stage.
How many times can you take the PADI Open Water exam?
How many times can students take the Final Exam? Students will be given two attempts to achieve a score of 75 percent or greater on the Final Exam. If the second attempt is not successful, students are directed to meet with their instructor to review any material they don’t understand.
Is the padi test hard?
Getting your PADI Certification is not hard, it’s fun and it’s an incredible experience, but you do need to follow the rules to make sure that your PADI Open Water Course is also a safe experience. After you have completed the PADI course you will receive the PADI Open Water Certification Card.
Can you fart while diving?
Farting is possible while scuba diving but not advisable because: Diving wetsuits are very expensive and the explosive force of an underwater fart will rip a hole in your wetsuit. An underwater fart will shoot you up to the surface like a missile which can cause decompression sickness.
What is no stop time in diving?
The “no-decompression limit” (NDL) or “no-stop limit” , is the time interval that a diver may theoretically spend at a given depth without having to perform any decompression stops while surfacing.
What is the safest depth to dive?
Diving Safety Recommendations:
The American Red Cross recommends a minimum of 9 feet of water depth for head first dives including dives from pool decks.
How fast can a human ascend in water?
The answer varies among scuba certification organizations. Some organizations list a maximum ascent rate of 30 feet/9 meters per minute, while others allow a faster ascent rate. For example, old PADI dive tables (based on the US Navy Dive Tables) allow a maximum ascent rate of 60 feet/18 meters per minute.
Can you scuba dive every day?
Yes, you can scuba dive every day. As long as you remain with the dive table safety limits or use a dive computer. You have to monitor all your prior dives depth and bottom time, but 18-24 hours is plenty of time to recover between dives. You can even make several dives per day.
At what depth do the bends start?
The Bends/DCS in very simple terms
Anyone who dives deeper than 10 metres (30ft.) while breathing air from a scuba tank is affecting the balance of gases inside the tissues of their body. The deeper you dive, the greater the effect.
What is the ascent rate when diving?
The U.S. Navy and the National Oceanic and Atmospheric Administration (NOAA) use a rate of 30 feet per minute, and recreational dive-training-agency recommendations range from 30 to 60 feet per minute.
How do you use a compass to navigate to a sighted object?
To navigate with a compass, simply face the direction you want to go, hold the compass level straight out front and note the position of the North arrow relative to the lubber line. The reference marks on the rotating bezel make it easy to set that course.
When using dive tables divers must ascend no faster than a rate meter per minute?
Breathe properly for diving. Never breath hold or skip breathe when using compressed air. 8. Ascend at a rate of 18 metres/60 feet per minute or slower from every dive and make a safety stop at the end of every dive.
How do you use a dive computer?
How to use Student Dive Computers ** Wrist Computers – YouTube
How does a diving computer work?
HOW DIVE COMPUTERS WORK. Put simply dive computers use a depth sensor and a timer to work out how fast you absorb gases into your body by using an algorithm inside them. The deeper and longer you stay down the faster you absorb the gases you’re breathing and your computer monitors your depth and time at all times.
How do you use a dive computer compass?
Using the Compass on the SCUBAPRO G2 Dive Computer
Do dive computers have a compass?
Navigation. A key element to any scuba diver’s gear is his/her compass available either in an Integrated Digital Compass on your dive computer or as an analog compass on your scuba dive gauge. It lets you know where you’re heading and how to get back to your boat or shore.
What wrist do you wear a dive computer on?
You do need to closely monitor your depth during ascents/descents, safety stops / deco stops, and you often need to operate the inflator/dump to contro your depth at the same time…. that is why “computer on the right wrist” is most common. Best wishes.