Cable length prediction for towing models of reverse towing systems based on the cable deployment process

Given the dynamic depth changes of the underwater support vessel in the reverse towing system, the vessel needs to continuously adjust the cable length by reeling in or out to ensure that the towed body is stably towed at the designated position. Therefore, this paper considers the impact of the cable deployment process on cable length prediction and proposes a model that can dynamically predict the required cable length for the towed body at the designated position. A floating tow experiment was conducted in a towing tank, and the predicted and experimental cable length data were compared to verify the accuracy of the dynamic cable length prediction algorithm. The lift height of the towed body was compared between the proposed model and the traditional model to verify the validity of the model. The relative error between the predicted cable lengths and the experimental data was 3.8%. The relative error in the lift height between the proposed model and the traditional model was 7.2%. The proposed model can continuously and accurately predict cable length, allowing the underwater support vessel to continuously adjust the cable length, thereby ensuring the stable operation of the towed body at the designated operational position. •In light of the considerable influence exerted by the cable deployment process, a discrete model has been put forth to address the reverse towing system. This model is capable of facilitating continuous forecasting of cable length.•In order to validate the high precision and effectiveness of this model in continuous cable length forecasting, floating towing tank tests and simulation experiments were designed and conducted.•The model is capable of continuously and accurately predicting the required cable length for the towed body at a given operational depth or varying depths.