This record is for the largest grab dredger by physical size.
The record is measured by the volume of the grab bucket.
All measurements must be given in both metric and imperial terms.
This record is to be attempted by a business entity, e.g. limited company, corporation.
For the purposes of the record, grab dredger is a stationary dredger with a clamshell bucket which is normally mounted on a pontoon to excavate bay mud.