Appendix 3

Aboard of some vessels, a device has been systematically used to follow the geometry of the gear. The results obtained (cf. figures below) show that the wing spread of the gear usually fluctuates between 15 and 20 m, and the vertical opening is about 2 m, with some changes according to the depth and to the vessel, and eventually the year.

 

Wing spread and vertical opening of the Medits gear during the surveys 1994-1998

(In the figures below, depths are the average depths between the values recorded at the beginning and at the end of the haul)  source: geom.xls

Spain

 

Greece

Wing spread and vertical opening of the Medits gear during the surveys 1994-1998 (cont.)

(In the figures below, depths are the average depths between the values recorded at the beginning and at the end of the haul)

France

Vertical opening of the Medits gear during the surveys 1994-1998

(In the figures below, depths are the average depths between the values recorded at the beginning and at the end of the haul)

Spain

 

Greece

 

Vertical opening of the Medits gear during the surveys 1994-1998 (cont.)

(In the figures below, depths are the average depths between the values recorded at the beginning and at the end of the haul)

 

France