Bollard Pull Calculator with Limiting Speed (Barge)

Description

Select the right tug for your barge and also find out the limiting towing speed during the voyage using this simple calculator.

What does this Excel Sheet do?

This Excel sheet helps you calculate the following:
1. Required Static Bollard pull of a Tug used for towing a Barge
2. For a given environment, it calculates the limiting towing speed possible for the tow

How to use this excel sheet?

The Excel Sheet has three different sections: Inputs, Static Bollard Pull and Limiting Speed
Principal particulars of the Barge and the dimensions of Cargo are to be provided in the ‘Inputs – Vessel & cargo’ worksheet
The environment inputs are of two types: one for calculation of static bollard pull (STALL condition), and the other one for calculation of limiting speed (TOW condition)
Once inputs have been provided, the app calculates the Static Bollard Pull and the Limiting Speed
For some inputs, Tables and charts are required to be referred. These Tables and charts are provided alongwith for the user to enter these inputs.
The input cells are all in blue. Some critical outputs are in light orange. All parameters are in SI units

Limitations
It can be used only for Cargo height upto 91.5 m from sea level
Cargo is taken to be rectangular in section
Shielding effects are ignored when calculating the windage area of cargo/superstructures

References
1. DNV-RP-H103, 2011, Sec 7.2.6
2. DNV-ST-N001 Table 11.13
3. ABS Rules for Building and Classing Mobile Offshore Drilling Units, 2019, C 3-1-2/1.3.2