Abstract
The article implements the previously outlined proposal [1] on the feasibility of
 calculating the diameters of cables and threads of the cable-net part of a mid-water
 trawl based on ensuring their strength is equal to the cables in the first net piece.
 The case study was carried out regarding a commonly used trawl “Atlantic-1920
 m, Nizin” developed by the company “Fishering Service”.
 The calculation algorithm is described which includes determination of resistance
 forces of the cable-net part and tensions in the cables and threads of net pieces.
 The safety factor is determined on the basis of the permissible stresses for the
 respective materials of which cables and threads are manufactured.
 After that, the values of diameters for cables and threads are calculated so as to ensure
 that the safety factor in the net pieces is equal to the cables in the first net piece.
 As a result, the formula is derived, which is able to calculate the diameters
 of cables and threads of the cable-net part of a mid-water trawl based on
 ensuring their strength is equal to the cables in the first net piece.
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