| Many types of underwater features make an
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| | the sediments on the seabed can result in
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| interesting dive site, for example:*
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| | the particles being kicked up by the
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| Wildlife at the site. Popular examples
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| | divers fins.* Temperature. Warm water
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| are coral, sponges, fish, sting rays,
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| | diving is comfortable and convenient.
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| molluscs, cetaceans, seals, sharks, and
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| | Although cold water is uncomfortable and
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| crustaceans.* The Topography of the site.
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| | can cause hypothermia it can be
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| Coral reefs, drop offs (underwater
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| | interesting because different species of
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| cliffs), rock reefs, gullies and caves
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| | underwater life thrive in cold
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| can be spectacular. Deep dive sites mean
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| | conditions. Cold water means divers tend
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| divers must reduce the time they spend
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| | to prefer Dry suits with inner thermal
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| because more gas is breathed at depth and
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| | clothing which offer greater thermal
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| decompression sickness risks increase.
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| | protection although require training and
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| Shallow regions can be investigated by
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| | experience to use properly.* Currents.
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| snorkeling.* Historical or cultural items
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| | Tidal currents can transport nutrients to
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| at the site. Ship wrecks and sunken
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| | underwater wildlife increasing the
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| aircraft, apart from their historical
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| | variety and density of that life at the
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| value, form artificial habitats for
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| | site. Currents can also be dangerous to
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| marine fauna making them attractive dive
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| | divers as they can result in the diver
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| sites.* Underwater visbility varies
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| | being swept away from his or her surface
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| widely. Poor visibility is caused by
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| | support. Tidal currents that meet solid
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| particles in the water, such as mud, sand
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| | underwater vertical surfaces can cause
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| and sewage. Dive sites that are close to
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| | strong up or down currents that are
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| sources of these particles, such as human
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| | dangerous because they may cause the
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| settlements and river estuaries, are more
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| | diver to lose buoyancy control risking
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| prone to poor visibility. Currents can
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| | barotrauma.
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| stir up the particles. Diving close to
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