Thomas J Thompson
17 Mar 1979
- 21.5 -106.38333
- Electro-Voice RE45N/D
NOTES: Tape #3; Immediately precedes cut #117650. Notes from field log: "Other species present: Spinners seen 15 min. previous; Movements: Animal not positively seen; Photographs: no; Weather:cldy; Sea state and noise: 1, fair; Depth: ?>200'; filters:100Hz cond.; Gain:33-5; Est. # songs: ~8; Notes: NE shore of Maria Magdelena (Tres Marias Is. - Mex.). Swim step slapping occasionally; hear weaker signal; moved up-lost signal strength - did not re-encounter animal."
Includes 440Hz calibration tones. SEAOCEAN