Purposes
The shot has several purposes. The line is useful for divers in conditions of low visibility or strong tides where underwater navigation between the surface and the dive site is difficult or on deep dives where a navigation error would dramatically reduce useful underwater time. Divers can use the line to help buoyancy control, to ease long decompression stops and to prevent drift when ascending in a current.
The buoy marks the dive site for the people on the surface, who are generally on the dive boat, who provide safety cover for the divers. This helps them focus on the place where the divers are likely to return to the surface and helps them return to the dive site more quickly after the boat has moved away from the site.
Read more about this topic: Diving Shot
Famous quotes containing the word purposes:
“Virtuous people are simply those who have ... not been tempted sufficiently, because they live in a vegetative state, or because their purposes are so concentrated in one direction that they have not had the leisure to glance around them.”
—Isadora Duncan (1878–1927)
“What we call a democratic society might be defined for certain purposes as one in which the majority is always prepared to put down a revolutionary minority.”
—Walter Lippmann (1889–1974)
“Let us guard against saying that there are laws in nature. There are merely necessities: there is no one who commands, no one who obeys, no one who transgresses. Once you understand that there are no purposes, then you also understand that nothing is accidental: for it is only in a world of purposes that the word “accident” makes sense.”
—Friedrich Nietzsche (1844–1900)