This is a new international knowledge base. Symbols are dealt with and plotting and magnetic etc. You will make the discovery. You can learn this on this website. Where you are is vital.
Health is everything and paramount when enjoying the great blue.
For safe boating it is essential to know the positioning methods. You won't need electronic equipment. You will have results fast and love the idea of finding your way by yourself. Where you are is vital. This is a new international knowledge base.