Trawl Doors


Trawlworks supplies both Bison and Thyboron Type II trawl doors. Both have been successfully used in mid-water as well as bottom. However, their primary function is as an efficient bottom door.


Thyboron and Bison Trawl Doors


Bison doors are made in England by Edwin Ashworth Marine Ltd. Replaceable bolt-on shoes of cast alloy steel and removable ballast weights are standard.



Thyboron doors are made in Denmark by Thyboron Skibssmedie. The Type II model normally supplied has weld-on alloy shoe stock and is a modified version of their standard model. This version incorporates some features of their heavy model Type II.

Thyboron doors now come with the option of foils, available either with the doors or separately to be added on to an existing set. Adding a foil, or a spoiler, to the front to the door will increase the spreading power of the door without increasing the drag.



Bison Trawl DoorBison Door Specifications:


Size Dimensions (mm) Area (m2) Weight (Kg)
4 1380 x 905 1.25 120 - 200
5 1490 x 980 1.46 150 - 240
6 minus 1625 x 980 1.60 190 - 280
6 1625 x 1070 1.70 200 - 290
7 minus 1750 x 1070 1.80 220 - 320
7 1750 x 1150 1.90 240 - 340
7 plus 1750 x 1250 2.10 250 - 350
8 1900 x 1250 2.33 310 - 410
9 minus 2055 x 1250 2.49 360 - 470
9 2055 x 1350 2.64 420 - 540
10 2235 x 1450 3.00 500 - 700
12 minus slim 2510 x 1540 3.50 550 - 750
11 senior 2330 x 1730 4.00 700 - 950

* Other sizes to 10.6 m2 are available



Thyboron Trawl DoorThyboron Type II Door Specifications:


Size (") Dimensions (mm) Area (m2) Total Weight (Kg)
55 1470 x 920 1.35 134
60 1610 x 1010 1.62 208
63 1710 x 1040 1.78 248
66 1760 x 1100 1.94 297
72 1880 x 1190 2.24 335
76 1980 x 1230 2.44 394
80 2060 x 1270 2.62 423
84 2140 x 1320 2.82 447
88 2320 x 1350 3.13 546
92 2500 x 1490 3.73 634
96 2570 x 1600 4.11 665
100 2660 x 1640 4.36 748
104 2760 x 1760 4.86 815

*Other sizes to 10.9 m2 available

Back
Back


Trawlworks, Inc.

Trawl doors. Thyboron trawl doors and Bison trawl doors. Trawl doors and otter boards for commercial fishing applications.