In this five minute video from the WONCO-A, an instructor takes you through revision on the Nav Data Sheet.

For years the Nav Data Sheet has proved to be a critical tool for the route planning and navigation of a patrol.

It keeps you on track, no matter how challenging the conditions or terrain. As ever the devil is in the detail.

If you're an experienced navigator or patrol leader, do you have any top tips to share? If so hit contribute and let us know. You could even record your own 'Soldier's Five' and send it in.