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      $56

      Bollard Pull Calculator (Ships)

      This Excel sheet calculates the required Bollard Pull to tow a conventional ship shaped vessel.


      It rigorously calculates all the forces on the vessel, viz.

      1. Calm Water Resistance: It is calculated using the established Holtrop and Mennen formula

      2. Wind resistance: Based on Wind Height and Shape coefficients from ABS MODU rules, and corrected for wind direction.

      3. Wave Resistance: From DNV Rules for Marine Operations, and corrected for forward vessel speed using Faltinsen, 1990

      4. Propeller resistance and Hawser resistance: From US Navy Towing Manual


      Very useful in Marine Operations. It can be used to accurately predict the bollard pull to tow a vessel. The tug can be accordingly selected.




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