Today when the students arrived, the Danger Shop was already set to today's terrain. Students would see pristine beaches stretching for miles, with an island about a half-mile offshore.

"You may be wondering what sort of terrain you need to learn about with a beach," Ghanima began once everyone had arrived. "Rather than build sandcastles, however, today we'll be learning about scuba diving. Water covers most of this planet, so being able to move through it is an important ability."

"Scuba diving may be performed for a number of reasons, both personal and professional. Most people begin though recreational diving, which is performed purely for enjoyment and has a number of distinct technical disciplines to increase interest underwater, such as cave diving, wreck diving, ice diving and deep diving."

"Divers may be employed professionally to perform tasks underwater. Most of these commercial divers are employed to perform tasks related to the running of a business involving deep water, including civil engineering tasks such as in oil exploration, underwater welding or offshore construction. Commercial divers may also be employed to perform tasks specifically related to marine activities, such as naval diving, including the repair and inspection of boats and ships, salvage of wrecks or underwater fishing, like spear fishing."

"Other specialist areas of diving include military diving, with a long history of military frogmen in various roles. They can perform roles including direct combat, infiltration behind enemy lines, placing mines or using a manned torpedo, bomb disposal or engineering operations. In civilian operations, many police forces operate police diving teams to perform search and recovery or search and rescue operations and to assist with the detection of crime which may involve bodies of water. In some cases diver rescue teams may also be part of a fire department or lifeguard unit."

She went on to explain how to suit up properly, as well as the mechanics of scuba diving. "Today we're looking at two ways you might need to use the ocean, and scuba, to achieve a goal," Ghanima continued. "There's three scenarios today, and you can choose just one, or all, if you have the time."

"So suit up, and enjoy the water."

[OCD is up, dive in!]