Bollard Pull Calculator for Ships (Excel Engine)

A place to exchanges questions and ideas of a technical / procedural nature. Go ahead, try to stomp us !
Leak Patrol
Posts: 35
Joined: Fri Nov 15, 2013 10:45 pm

Bollard Pull Calculator for Ships (Excel Engine)

Postby thenavalarch » Sun Jan 26, 2014 12:22 am


Following the success of Bollard Pull Calculator for Barges, introduces an Excel Engine for Bollard Pull calculations for Ships, i.e., 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.

A youtube video demo can be found here:

To download, go to:

Write to:

Return to “The Workshop”

Who is online

Users browsing this forum: No registered users and 1 guest