Dry Suit Guide

A dry suit is an essential piece of equipment for diving in colder water. Keeping warm is an important part of enjoying your dive. But which to get? Dry suits differ to wetsuits in that they don’t allow any water in. But this in turn has its issues that you need to learn about. Drysuits can be split into two main types: Membrane and Neoprene. The main difference being how you control your level of insulation.

Thank you to Simply Scuba for making this video

Decompression Sickness

Discover the signs and symptoms of decompression sickness. Explore the causes of decompression sickness. Excessive supersaturation and gas seeds/micronuclei. Silent bubbles. Type I decompression sickness: pain only, skin and joints. Type II decompression sickness: dangerous pulmonary and cerebral symptoms.

Thanks to Easy Dive Theory for making this video

Blood, Oxygen, Carbon dioxide and Carbon Monoxide

Learn more about the circulatory system and respiratory system. How does it all work and what can go wrong? Cellular respiration. Red blood cells and plasma. Haemoglobin. Carbon monoxide poisoning.

Thanks to Easy Dive Theory for making this video

More on the Respiratory System- Mammalian Reflex

Find out more about the respiratory system. Explore respiratory system problems. Breathing reflex and hypercapnia. Hyperventilation and shallow-water black-out. The Mammelian Reflex.

Thanks to Easy Dive Theory for making this video

The Respiratory System

Find out about the respiratory system and its relevance to diving. explore gas exchange under high pressure and explainations. Explore gas exchange under high pressure and explains nitrogen sickness and ‘the bends’.

Thank you to Dr Matt & Dr Mike for making the video

Temperature-Related Problems

Temperature-related problems can be a big issue for divers. When we dive it is proper to wear the right, correct-fitting exposure suit to avoid temperature-related problems. Hyperthermia, Advanced hypothermia heat exhaustion and heat stroke. Vasodilatation and vasoconstriction.

Thanks to Easy Dive Theory for making this video

Lung Over Expansion Injuries

Explore lung over-expansion injuries. Lung over-expansion injuries are serious types of decompression sickness that can be life-threatening. Arterial gas embolism, pneumothorax, mediastinal emphysema, and subcutaneous emphysema. Decompression illness.

Thanks to Easy Dive Theory for making this video

How to Perfect Your Weighting for Scuba Diving! (1st Basic Principle of Scuba Diving)

How to Calculate Buoyancy

Learn how to calculate buoyancy. Find how to calculate how to make objects neutrally buoyant, positively buoyant and negatively buoyant and the correct formula to use in calculating buoyancy.

Constants Used

METRIC

1 litre of salt water weighs 1.03 kilograms
1 litre of fresh water weighs 1 kilogram
Pressure increases by 1 atm every 10 metres of salt water
Pressure increases by 1 atm every 10.3 metres of fresh water Pressure changes per unit of salt water = 0.100 atm/m
Pressure changes per unit of fresh water = 0.097 atm/m

IMPERIAL

1 cubic foot of salt water weighs 64 pounds
1 cubic foot of fresh water weighs 62.4 pounds
Pressure increases by 1 atm every 33 feet of salt water
Pressure increases by 1 atm every 34 feet of fresh water
Pressure changes per unit of salt water = 0.445 psi/ft or 0.0303 atm/ft
Pressure changes per unit of fresh water = 0.432 psi/ft or 0.0294 atm/ft

Thanks to Easy Dive Theory for making this video

Partial Pressure Explained

Learn about partial pressure in a gas mix and how it changes with depth. Learn how this applies to using enriched air nitrox.

Thanks to Easy Dive Theory for making this video

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