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3 ARE HYDROPHONE STRING<br />

Deployed from Salmaster. Fixed for each of two shots separately. Syledis<br />

fix few minutes after shot to avoid any possible interference problems with<br />

on ship signal recording, Syledis being an active transmitting system.<br />

(a) 4500 lb shot fix:<br />

Fixed at: 11:00:00 on 29.9.87<br />

Beacons: GIR, INV, RED<br />

Depth: 61.5 m<br />

Accuracy on fix: 1 fix with a - 1 m<br />

Decca error: green 140 m<br />

(b) 900 lb shot fix:<br />

SYLEDIS BEACONS<br />

Fixed at: 15:37:55 on 29.9.87<br />

Beacons: GIR, INV, RED<br />

Depth: 61.5 m<br />

Fix: 56°50.141N 01°35.729V<br />

Accuracy on fix: 1 fix with a - .3 m<br />

Drift from first fix on ARE hydrophone at first shot is 14 m.<br />

Decca error: not available.<br />

VHI: Vhinnyfield<br />

GIR: Girdleness<br />

INV: Inverbervie<br />

RED: Redhead<br />

118

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