Cool feature coming soon
https://www.navionics.com/usa/blog/post/sonarchart-shading-being-added-to-platinum-and-hotmaps-platinum/?utm_source=facebook&utm_medium=post&utm_campaign= 2019_card_sonarchart_shading%E2%80%8B&utm_content= blog_us&fbclid=IwAR2rExc-43RASYoXBgUx91A49fFFg7QgUVeW_ZVWypNEWo2E95ukAe1osi 4
