Which of the following is an essential feature to consider when selecting a diving mask?
The most important feature of your dive mask is that it makes a good seal on your face (and as such feels comfortable and barely leaks). Other features to consider include mask volume, number of lenses, skirt opacity, prescription options, and purge valve.
What is the single most important feature to consider when purchasing a scuba regulator?
The single most important feature to consider when purchasing a scuba regulator is: The availability of regular, professional maintenance.
When planning and executing a dive it is important for dive buddies to?
The maximum dive time for a dive to 60 ft is ______________ minutes. Computers and dive tables will eliminate the risk of DCS. When planning and executing a dive, it is important for diving buddies to: Agree on a dive leader.
When selecting a face mask the most important thing to consider is NAUI?
Terms in this set (85) When selecting a face mask, the most important thing to consider is: Proper seal and fit. Snorkels over 15 inches in length are not reccomended primarily because: They have too much dead air space.
What are the best goggles for diving?
Best High-End Scuba Masks
- Cressi Panoramic.
- Cressi F1.
- Oceanic Mako.
- Cressi Nano.
- Kraken Aquatics.
Which is the most effective way to descend while maintaining orientation?
Question Answer which is the most effective way to descend while maintaining orientation and attempting equalization of the ears feet first when making an emergency ascent, a scuba diver should exhale continuously during the ascent periodically attempt to inhale
What is the most important rule of scuba diving?
If you remember one rule of scuba diving, make it this: Breathe continuously and never hold your breath. During open water certification, a scuba diver is taught that the most important rule in scuba diving is to breathe continuously and to avoid holding his breath underwater.
What are the three A’s of buoyancy control?
The best way to control your position in the water by breathing in and out. Read more about The Three BCD’s – The Outer, the Inner and the Mental one! Your lungs are a natural buoyancy controller and you can utilize this perfectly when diving.
How is nitrogen narcosis treated?
The main treatment for nitrogen narcosis is simply getting yourself to the water’s surface. If your symptoms are mild, you can stay in shallower waters with your dive partner or team while you wait for them to clear. Once your symptoms have cleared, you can resume your dive at that shallower depth.
What limits should be established prior to every scuba dive?
If you are diving wearing an exposure suit, you should _________to safely control buoyancy as you descend. Which of the following limits should be established prior to every scuba dive? Maximum bottom time, maximum depth, minimum air pressure.
What gas law best explains diving medical problems?
While the main mechanism in all the complications of scuba diving is the same (compression of gases underwater on descending and expansion under decreasing pressure on ascending), it depends on two laws to explain its pathophysiology: Henry’s law, which states that the amount of a given gas that is dissolved in a …
What masks do Navy Seals wear?
Standard Navy SEAL dive fins and diving masks are similar to standard retail versions. However, combat divers also use the military Full Face Mask. This mask gives the wearer extra face protection and functions well in polluted waters.
How much does diving gear cost?
Most divers will typically spend between $200 and $300 on their personal equipment, and may spend quite a bit more if they are also purchasing a wetsuit and a personal dive computer. A diver who wants to be comfortable and confident in open water will typically invest in a full equipment system.
What is the following rate of ascent for diving?
Ascend no faster than 30 feet per minute — one foot every two seconds. The usual rate was 60 feet per minute until the U.S. Navy adopted the 30-foot-per-minute rate in 1996 and training agencies followed suit.
What is the golden rule in scuba diving?
1. Never hold your breath. This is undoubtedly by far the most crucial of all safety rules for diving because failure to adhere could result in fatality. If you hold your breath underwater at the depths at which scuba divers reach then the fluctuating pressure of air in your lungs can rupture the lung walls.
What are the 10 steps to scuba diving?
The top 10 safety tips for scuba diving include:
- Never hold your breath.
- Never without a buddy.
- Ascend slowly from every dive.
- Perform a safety stop at 5-6 metres (16-20 feet).
- Plan your dive and dive the plan.
- Know your limits and dive within your limitations.
- Check your air contents gauge regularly.
What is the single most important rule of scuba diving?
Can Humans have negative buoyancy?
This amount of body fat is typically sufficient for a person to float along the surface of the water with positive buoyancy or at the very least neutral buoyancy….Negative Buoyancy in Relation to Humans.
Substance Average Density Value Fat Tissue 0.9 g/mL Water 1.0 g/mL Muscle Tissue 1.1 g/mL
Can a human survive 47 meters underwater?
According to the US Navy dive decompression tables a diver may spend up to five minutes at 160′ (47 meters) without needing to decompress during their ascent. The longer a diver stays underwater the greater their exposure to “the bends” becomes. The bubbles can cause the bends.
Can nitrogen narcosis kill you?
In severe cases, divers have been known to experience convulsions, possibly causing loss of consciousness in extreme cases. This can obviously be very dangerous as it can lead to instant death while deep underwater.
When selecting a face mask the most important thing to consider is?
When selecting a face mask, the most important thing to consider is: Proper seal and fit. Snorkels over 15 inches in length are not reccomended primarily because: They have too much dead air space.
What is the minimum surface interval?
Surface Interval Time (SIT) must be at least 10 minutes between dives. If your SIT is less than 10 minutes, you must consider your second dive as a continuation of the first dive. NAUI recommends a SIT of at least one hour between dives. Use the next greater dive time if your dive is particularly cold or strenuous.
What should I look for in a diving mask?
Any mask you choose should have the following standard features:
- Tempered glass, or high quality composite made for scuba diving.
- Low profile design. This makes clearing water out easier.
- Finger pockets around nose that allow you to squeeze your nose with your fingers.
How do I choose a mask?
A mask should fit to your face underwater without strap pressure being applied, so keep mask straps loose for maximum comfort. Trying to improve the fit of a mask by tightening the straps will only lead to discomfort during the dive. The water pressure will hold the mask against the face one it is sealed on.
Can you rent scuba gear to save money?
The equipment required for scuba diving can cost a fortune. Renting equipment from a dive store is a great way to save money. Buy the essential items for yourself first, then rent scuba gear for the rest of the remaining equipment that you need.
What do you need to know about diving equipment?
A good, sturdy, well-fitting BCD really adds to your diving experience and comfort. It’s important to know where the pockets are, how the weight system works, and all the other little details also helps to add to your safety and peace of mind during a dive.
When do I need to buy my own SCUBA gear?
But if you routinely dive in cooler waters, you might want a good wetsuit of your own, rather than renting one. And if you live in an area with cold waters, a dry suit can be a necessity to dive year-round. And buying your own drysuit is often the only option. Same considerations go for gloves and a hood.
What should I buy for my first dive?
The first dive gear most people buy are fins, mask, and snorkel. Some even buy them before they start diving. Being relatively simple to buy in both dive shops as well as sporting goods stores, these basic pieces can also be used on the beach anytime.