7 Apr 1979
- SONY UNSPECIFIED MODEL
- Sennheiser MKH 406
NOTES: Notes from recording log: "No sighting of calling individual - are others in area and [protocal] is on tape, some apparent chases. Animals seem to be approaching boat. 1120 seem to have lost main calling whale but will continue until end of tape: some lobtailling off starboard bow (~20¡) and also threw its flukes. Had limiter on for 1st 10 minutes. Notation onn tape when limiter turned off. 440Hz in at 22 min into tape. Reduced gain from 8 to 4 when we turned limiter off. Weather: clear, sunny. Sea State and Noise: calm, very little ambient. Depth: 12' hydrophone. Propulsion & aux noise: none - stopped. Recorder: Sony; hydrophone LC54."
Includes 440Hz calibration tone. Water depth: 14 fathoms. SEAOCEAN