Teejet Nozzles 30 Inch Spacing

Teejet Nozzles 30 Inch Spacing. Is a foot of spray on each end considered overlap or. I am looking for ideas for applying 25 gal of the 30% with my tyler patriot xl sprayer 75 ft booms 20 inch spacing for 30 inch corn rows.

Got a question, why does teejet recommend 20 spacing for tt11004 but the nozzle sprays 4 feet wide pattern? Spray tip options teejet spray select web app view spray tip greenleaf technologies nozzle calculator view spray tip hypro spray nozzle selection guide view spray tip