The Deep Range — Arthur C. Clarke

A man discovers the planet's destiny in the ocean's depths in this near-future novel by one of the twentieth century's greatest science fiction authors.
 
In the very near future, humanity has fully harnessed the sea's immense potential, employing advanced sonar technology to control and harvest untold resources for human consumption. It is a world where gigantic whale herds are tended by submariners and vast plankton farms stave off the threat of hunger.
 
Former space engineer Walter Franklin has been assigned to a submarine patrol. Initially indifferent to his new station, if not bored by his daily routines, Walter soon becomes fascinated by the sea's mysteries. The more his explorations deepen, the more he comes to understand man's true place in nature -- and the unique role he will soon play in humanity's future.
 
A lasting testament to Arthur C. Clarke's prescient and powerful imagination, The Deep Range is a classic work of science fiction that remains deeply relevant to our times.