OCEAN3D-OCEANS’ DIGITAL DEPTH DATABASES IN DIGITAL’S NAV APPLICATIONS WORLDWIDE
Marine Traffic ~ https://www.marinetraffic.com/
Others but the BEST of iPhone apps for nautical navigation ( in acc. to Bing) ~ https://www.apppicker.com/applists/3749/The-best-iPhone-apps-for-nautical -navigation#:~:text=SeaNav%20is%20a%20nautical%20navigation%20app%20for%20iPhone.,DE%2C%20FR%2C%20NL%20%26BE%2C%20DK%2C%20NO%20and%20ES%29.
Others but the BEST of iPhone apps for nautical navigation ( in acc. to Google) ~ https://www.sailmagazine.com/diy/navigating-the-app-world
Have a save sailing @ seas !