sentences:  Bollard pull is primarily (but not only) used for measuring the strength of tugboats, with the largest commercial harbour tugboats in the 2000-2010s having around of bollard pull, which is described as above "normal" tugboats..The worlds strongest tug is Island Victory (Vard Brevik 831) of Island Offshore, with a bollard pull of .Island Victory is not a typical tug, rather it is a special class of ship used in the petroleum industry called an Anchor Handling Tug Supply vessel.