There are three main forces acting on the head line cable. One is the sinking weight of the cable in sea, another is the drag of the cable itself and the third is the pulling force on the headline sonar which is fixed to the trawl. When the pulling force is suitably adjusted the headline cable is taut and if steel wire is used it will slope bit down due to the weight. DynIce Data will have similar slope but in the opposite and upward direction. If there is a slack in the headline cable the steel wire falls down, it can touch the warps during turning and even fall into or below the trawl and damage...

A coaxial data transfer cable with central copper conductor and screen enclosed in a DynIce Dux rope. Specially designed for data transfer from trawl headline sonars where high loads are on the cable while signal is sent or data retrieved. The cable is also very suitable for deep sea research vessels using drum winches. The production process is unique and patent pending. The construction is based on copper centre conductor with dense screen of copper filaments to protect from electromagnetic waves. The data cable can also be used as high strength single phase conductor. iDynIce Data Copper conductor...

Steel cable: - corrodes - hard to splice if broken - weight of 2.000 m in air is 880 kg - weight of 2.000 m in sea is 676 kg - density 4,47 - can damage trawls and DynIce Warps - lifetime about 1-2 years DynIce Data: + no corrosion + spliceable + weight 2.000 m in air is 326 kg + weight 2.000 m in sea is 76 kg + density 1,35 + will not harm trawls or DynIce Warps + lifetime + 4 years