No doubt older mariners remember the LORAN navigation system, but for those too young to use LORAN, it may not be long before you must learn. For the uninitiated, if you’ve ever wondered what those gridded lines on navigation charts are, you might be interested to hear about the navigational aid. The LORAN system was developed during World War II and used to accurately position mariners for about 60 years until it was declared obsolete and decommissioned in 2010. Its successor, GPS (Global Positioning System), is so powerful and easy to use that it has become a part of our…