| 摘要 |
<p>The invention is a bridle block system for a paravane (9) for seismic equipment, comprising: - a main bridle block (1) with a connecting point (2) for a towing line from a seismic vessel, and with attachment points (7b, 5b) for first and second triples of bridle lines (8, 11) to first and second lugs (41, 42, 43, 51, 52, 53) at either ends of the paravane (9). The main block (1) comprises a pivot point (3) for a pivot arm (7, 5), which has an arm (7) with an attachment point (7b) near its end for the first triple bridle lines (8), and an oppositely directed arm (5) with an attachment point (5b) near its outer end for second triple bridle lines (11). An auxiliary moment arm (12) at the second arm's (5) side is connected to a seventh bridle line (13), further connected to an actuator (14) arranged near the first bridle lines' (8) forward lugs' (41, 42, 43) of the paravane (9). The seventh bridle (13) exerts a force imbalance between the fore and aft bridle lines (8, 11) so as for changing the paravane's angle of attack.</p> |
