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:
“It is not enough that we are truthful; we must cherish and carry out high purposes to be truthful about.”
—Henry David Thoreau (1817–1862)
“So shall you hear
Of carnal, bloody, and unnatural acts,
Of accidental judgments, casual slaughters,
Of deaths put on by cunning and forced cause,
And in this upshot, purposes mistook
Fallen on th’inventors’ heads.”
—William Shakespeare (1564–1616)
“One of the baffling things about life is that the purposes of institutions may be ideal, while their administration, dependent upon the faults and weaknesses of human beings, may be bad.”
—Mary Barnett Gilson (1877–?)