SA-578 SUPPLEMENTARY REQUIREMENTS S1 1

[ChiangJaron]

The ASME UT procedure SA-578 with supplementary requirements S1 as :

S1.1 Scanning shall be continuous over 100 % of the plate
surface along parallel paths, transverse or parallel to the major
plate axis, with not less than 10 % overlap between each path.

Can anyone tell me what's means " with not less than 10% overlap between each path"?
If possible, please give me a sketch for easy understanding.

Thanks

 

[XL83NL]

Cut two paper strokes of 10 cm wide, one from yellow paper, one from blue paper. Lay them parallel to eachother, and make sure they overlap at least 1 cm. The 1 cm wide (when held in light) green stroke you have now created is what SA-578 S1 intends.