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Underwater target shooting is an underwater sport that tests a competitors’ ability to accurately use a speargun via a set of individual and team events conducted in a swimming pool using free diving or Apnoea technique. The sport was developed in France during the early 1980s and is currently practised mainly in Europe.
Nevertheless, it is a powerful technique and capable of producing high thrust, but this high thrust has a high energy cost when applied by sub-optimal fins and to high-drag scuba diving equipment, so it is often only used for short bursts by scuba divers.
Diver trimmed with weight far towards the feet: The static moments of buoyancy and weight cause the feet to rotate downwards, and the thrust from finning is then also directed downwards Diver with weight and centre of buoyancy aligned for level trim: The static moments of buoyancy and weight keep the diver horizontal, and fin thrust can be aligned with direction of motion for best efficiency
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A header is a technique that is used in association football to control the ball using the head to pass, shoot, or clear. This can be done from a standing, jumping, or diving position. [1] Heading is a common technique and is used by players in practically every match.
They demonstrated their acrobatic techniques from the 10 m diving board at Highgate Pond and stimulated the establishment of the Amateur Diving Association in 1901, the first organisation devoted to diving in the world (later amalgamated with the Amateur Swimming Association). Fancy diving was formally introduced into the championship in 1903.
The technique is to stand at the edge of the deck, fully kitted, with the fins beyond the foot pocket overhanging the edge. The diver holds the mask and DV with one hand and bends forward at the hips, keeping the legs straight, curls in the head, and falls forward, rotating so that the top of the back-mounted cylinder strikes the water first.
Competitors are required to swim underwater around the course in sequence and to confirm the discovery of each orienteering point ‘by clearly pulling or spinning it’. Competitors are ranked using a point scoring system for correctly rounding the five buoys, for each orienteering point found and for the speed of the swim around the course. [10]