Magnetic Locators Video Training.
Intro to Magnetic Locating.
https://www.youtube.com/watch?v=lMcCftFrbXg
Principles of Magnetic Locating
https://www.youtube.com/watch?v=sTFIUyL0-Ow
Indepth Magnetic Locating
https://www.youtube.com/watch?v=fVOKqV2mO1E
Locate Survey or Property Markers