Towing Calculations & Plan

Our towing engineering packages include total towing resistance calculations (hull friction, wave-making, wind and current drag), required tug bollard pull analysis under varying sea states, towing bridle and wire catenary tension analysis, and surge/yaw stability.

Under SOLAS Chapter II-1 Regulation 3-4, all tankers over 20,000 DWT and other cargo ships must have an approved Emergency Towing Procedure (ETP/ETA) booklet detailing ship-specific towing gear, connection procedures, and rapid deployment instructions.

We calculate bollard pull using standard marine warranty surveyor (MWS) and IMO/Noble Denton guidelines, factoring in vessel displacement, towing speed, significant wave height (Hs), wind speed (typically 40 knots), and current velocity along the intended voyage route.

Yes. We write comprehensive Towing Operation Manuals outlining towing connection procedures, emergency breakaway actions, weather routing criteria, communication protocols, and bollard pull limits for approval by Marine Warranty Surveyors (MWS) and class societies.

We design and verify towing bitts, smit brackets, fairleads, towing winches, gob eyes, and shark jaws, performing FEA stress analysis and deck reinforcement calculations to satisfy MWS and classification society safety factors.