Gradient Factor(GF)
스쿠버넷 – 스쿠버넷 2014년 06월호 58쪽~68쪽, PDF 파일 29쪽~35쪽 – http://www.scubanet.kr/article/view.php?category=&article=768&page=1 Understanding M-values – Erik C. Baker, P.E mvalues GRADIENT FACTORS – Matti Anttila, Ph.D Gradient_Factors https://diverite.com/gradient-factors/