What does SOFAR stand for?

Sound, Far, and Ranging (SAUS)

Sound Finding and Ranging (SAUS)

Sound Fixing and Ranging - Navy underground sound system

Sound Fusing and Ranging

Sound Fusing (or Fuzing) and Ranging (SAUS)

Sounding, Fixing, And Ranging (SAUS)

Sound Ocean Fixing and Ranging (SAUS)