This is the most often asked question in a fire or sinking. The evidence has been burned or lost and its up to the investigating surveyor to determine what caused the loss. This is a special skill that is learned in the classroom and in the field. An engineering background is essential to understanding the physics and mechanics of events.

The investigating surveyor must be able to evaluate the scene, determine the origin and look for the cause. In fire cases, fraud and arson are always possibilities. The investigator must be able to determine if the authorities should be brought into the case. Is the suspected cause the probable cause?