Archive for June, 2012

Parachuting

Thursday, June 21st, 2012

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Credit: Horia Varlan

Parachuting or skydiving is an extreme sport where thrill-seeking jumpers fall or jump from an aircraft at high altitude either in tandem with an instructor or as a solo jumper. During the descent a parachute is deployed to slow the speed of the fall, and experienced jumpers can perform aerial manoeuvres to show off their proficiency, before landing as gently as possible on the ground. Parachuting took off as a sport after World War II, when there was a glut of surplus parachute equipment.

Safety of Parachuting

This extremely exhilarating adrenalin rush, which usually requires that jumpers exit the aircraft at between 12,000 to 14,000 feet, naturally comes with dangers. The sport, however is relatively safe. The United States Parachuting Association reports that of the more than three million jumps that took place in 2010, the fatalities only numbered 21, and the number of accidents is decreasing each year. British Parachute Association statistics show different rates of injury for males and females. This is due to body shape and weight distribution. The minimum weight for a jumper is six stone, while the maximum weight is usually 15 stone, although this does vary from centre to centre. It is not recommended that asthmatics participate in parachuting since jumps take place at altitudes where partial pressure of oxygen is significantly reduced.

Training

To participate in parachuting, a jumper must be aged at least 16. Anyone under the age of 18 must have written parental or guardian permission prior to the jump. Whether a person is seeking the adrenalin rush of parachuting as a regular hobby, or wants to raise funds for a good cause by completing a one-off sponsored jump, it is important to prepare well for the jump by completing a course at one of the UK’s 25 British Parachute Association-approved parachute clubs. These are located throughout the UK and range from professional full-time centres to weekend clubs run by expert volunteers.

Types of Jumps

A novice can make his first jump in one of three manners:

  1. A static line descent involves the jumper exiting the aircraft at around 3,500 feet and having the parachute deployed automatically by means of a static webbing line attached between the aircraft and the parachute pack. This type of jump requires just six hours of pre-jump training.
  2. Accelerated freefall (AFF) requires an intensive course, of one week, which will qualify the participant as a skydiver. The first descent will take place at an exit height of 12,000 feet, and will take place with two expert instructors, who will jump with the novice and guide him with radio-communicated instructions and hand signals. The jumper will fall for approximately 45 seconds before deploying his own parachute. During the week, the jumper will perform around ten jumps.
  3. The quickest and easiest way to experience parachuting is via a tandem jump, where the jumper is strapped to an instructor via a dual harness system. Preparation for a tandem jump takes just 15 minutes. The instructor and jumper will exit the aircraft at around 10,000 feet and the instructor will deploy the parachute at around 5,000 feet, allowing the jumper to relax and enjoy the experience.

Caving (Potholing)

Tuesday, June 5th, 2012

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Credit: NeilsPhotography

Caving or Potholing is a relatively new sport, being practised for recreational purposes only within the last 100 years or so. Caving is growing in popularity in the UK and is a great way to keep fit as well as providing an excellent opportunity to explore the countryside both at home and abroad. Due to the risks of exploring underground in dark, wet and sometimes unstable conditions, caving is often classed as an extreme sport.

Caving Equipment

There is a variety of equipment available for keen cavers but only basic gear is needed for those getting started. A helmet with attachable head lamp is essential to protect yourself from bangs on the head and light the way while leaving your hands free for climbing and balance. Specialist clothing is available but any old clothes will do to start. Dress warmly and wear thick socks. Avoid clothing that becomes heavy when wet like denim jeans. A waterproof oversuit or separate trousers and jacket should be worn on top of your clothes to keep you dry. Good boots are also essential – Wellington boots with non-slip soles are usually the best type of footwear for caving.

For caving routes with steep or high ascents and descents, a climbing rope or ladder and other climbing equipment such as harnesses, carabiners and figure-of-eights may be needed.

For safety reasons, all cavers should also carry emergency equipment such as a first aid kit, food, spare head lamp and a whistle.

Caving Safety

Although caving is classed as an extreme sport by many, the risks can be minimised by taking sensible precautions. The main risks involved with caving are flooding, falling, injuries due to falling rocks and exhaustion

Cavers need to make sure that there is no risk of flooding during the expedition. It is generally not a good idea to go caving if heavy rain is forecast. You should never attempt a caving route on your own – small groups of four are more are safest as if someone is injured this allows one person to stay with the injured caver while the others seek help. You should also let people know of your expected return time so that they can raise the alarm if you are significantly late.

Novice cavers can easily become lost or fall so be sure to cave with a more experienced caver if you are unfamiliar with the route or techniques needed to complete it. Rope and climbing techniques can be practised above ground before attempting them while caving.

Despite the potential dangers, caving accidents are fairly rare and the sport is a common one for school children as an outdoor education activity.

The Cave Rescue Organisation published statistics for 2006 show that they attended 12 caving accidents during the year. Three incidents were due to floods, two to falls, two to exhaustion and the rest to equipment failure or cavers becoming lost. They have attended a total of 620 caving accidents since 1935 which shows that the risks of caving are actually very low when compared to many other sports.