ML110847

Iruzkina

NOTES: LNS notes: Recordist changes gain several times through recording. Ship's radar on in first several seconds, creating a prominent background noise at approximately 50 Hz, and at lower levels for several minutes until it was turned off. See transcription of recordist's announcements. 23Sep2003 SAS. Reel notes: "1000~ cal tone @ .775 VRMS (at head of reel) when 0 dBM; 0 VU on UNQ-7. 1013-1100. 15 Feb. 1973. Virgin Island Banks. Individual humpback within 1/4 miles. Best." Sound Recording Log: "Date: 15 Feb 1973. Time start: 1013. Time stop: 1100. Cruise #A-388. Tape #s 20. Position: Lat. 18¡33.9'N Long. 64¡31.6W. Species: Humpback. Number: 1 seen. Est. Range: 300 yds. True bearing: 260¡. Rel. Bearing: 290. Movements: more/less stationary. Weather: Ptly cloudy. Sea state & noise level: 3 - mod swells, NNE. Depth: 10 fath. Propulsion & Aux. noise status: Engines off. Recorder: UNQ-7a. Filters: open. Gain: 2, 1 1/2, 1. Hydrophone: R-130. If Hump: # full calls: 2. Any peculiarities: large dives (20+ min) with blows in mid call as well as end. GOOD. Other notes: Calibration tone 1000~ .775 VRMS when VU meter is at 0 on UNQ-7a. Close individual, cut gain of UNQ-7a from normal 2 to 1 1/2, then 1, 1 1/2. Turned off radar, radio and new Navy Radar Transponder to get hash out of AC line. This is our best tape of a close individual so far this cruise." SEAOCEAN.