i used to work on trawlers as well out of fleetwood some 30 yrs ago, you need an halfer or arthur to start the mending process or as the above poster said, cant remeber the name but sounds like what ive said
My link try this link
or this 1 My link
hope it helps
its a halfer one bar of the diamond that makes a mesh thats your starting point then you have side knots and meshes