Table of Contents
How do I signal my remaining air diving?
Air Pressure Check The partner replies by pressing one finger to the arm for each 1,000 PSI and one finger up for each 100 PSI of air pressure left in their tank. For example, if the diver being asked has 1,400 PSI left, they press one finger to the arm, and then hold up four fingers.
What are diving hand signals?
The first-hand signal that most scuba divers learn is the “OK” hand signal. Join the thumb and index fingers to form a loop and extend the third, fourth, and fifth fingers. The “OK” hand signal should not be confused with the thumbs-up signal, which in scuba diving means “end the dive.”
What is the symbol of diving?
A diver down flag, or scuba flag, is a flag used on the water to indicate that there is a diver below. Two styles of flag are in use. Internationally, the code flag alfa/alpha, which is white and blue, is used to signal that the vessel has a diver down and other vessels should keep well clear at slow speed.
What is narcosis in diving?
In underwater diving, narcosis (nitrogen narcosis, inert gas narcosis, raptures of the deep, Martini effect) is a reversible change in consciousness that occurs while a person is diving at deep depths. Certain gases at high-pressure cause an anesthetic effect that alters a diver’s consciousness.
What should you and your buddy do if separated during a dive?
If you get separated from your dive buddy, stop and do a slow visual 360-degree spin, remembering to look both upwards and downwards. Try spotting your buddy’s bubbles, if possible. If you are carrying a tank banger or similar audio buddy signaling device, use it to see if your buddy can locate you from the sound.
How do you calm down before diving?
If you feel anxious underwater, give yourself compassionate and kind thoughts. Remind yourself that you are safe and in control of the situation. Tell yourself that you are strong and adventurous and you can do it. Notice your surroundings and remind yourself of how amazing it is to be underwater!
What does diver down flag look like?
Divers Flag This flag is red with a white diagonal stripe running from the top left to the bottom right corners. It is often used to alert other boaters to scuba diving and snorkelling in the ocean.
Why do divers spit in their masks?
Decreasing the surface tension and creating a moisture film prevents fogging. As a surfactant; saliva decreases the surface tension of the droplets. The water from the condensation does not mound up as beads or droplets but, instead breaks to form bigger droplets that just roll away into the mask.
What happens if a diver goes too deep?
In extreme cases, it can cause paralysis or death if the bubbles are in the brain. Nitrogen narcosis: Deep dives can cause so much nitrogen to build up in the brain that you can become confused and act as though you’ve been drinking alcohol. Narcosis usually happens only on dives of more than 100 feet.
What elements should you and your buddy agree on before the dive?
Plan Your Dive, Dive Your Plan Before every outing, you should agree with your partner on the essential elements of your dive: where you are going, the maximum depth, maximum bottom time, and the air level at which you’ll either return to your entry point or begin your ascent.
How do you maintain buddy contact?
Always maintain buddy contact and communicate often As a general rule, try to be no more than 2 seconds apart. In an emergency you may need each other and it helps the Divemaster control the group if you are together. Don’t forget to ask your buddy if they are “okay” regularly.