First published in 1981, Thayne Smith’s book, “In a Time of Need” detailed the use of Lowrance paper chart recording sonar units for search and recovery work.

First published in 1981, Thayne Smith’s book, “In a Time of Need” detailed the use of Lowrance paper chart recording sonar units for search and recovery work.

First published in 1981, Thayne Smith’s book, “In a Time of Need” detailed the use of Lowrance paper chart recording sonar units for search and recovery work.