Bollard Pull Calculations for Ships

(10 customer reviews)




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

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

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10 reviews for Bollard Pull Calculations for Ships

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Showing 6 of 10 reviews (5 star). See all 10 reviews
  1. Navaltik Portugal (verified owner)

  2. Saeed Khorram (verified owner)


  3. Hans Langsrud (verified owner)

  4. m Lankford (verified owner)

    I have other product from The Naval Arch, that I have been using for the past 6 years, with ease of inputs it has assisted in my daily operations as a marine surveyor.
    With all products there is full support, and updates

  5. Carl Henrik Frankman (verified owner)

    Especially the presented / calculated default values for certain input assisted with incomplete / unreliable information by the client. Here is also I see the greatest potential for improvement. Many of the coefficients can be estimated using thumb rules. Providing these would further enhance the programs usage, especially in a salvage context.

    • Team TheNavalArch (store manager)

      Thanks for the feedback Carl. We look to implement them in the next version

  6. Hu Xinbing (verified owner)

    A very good calculation app .

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