The irony of a digital PDF is that you still need a screen. Print your practical navigation solutions pdf on waterproof Rite in the Rain paper or laminate the critical pages (declination chart, pace count table, emergency signals).
: There are specific PDF documents dedicated to solving navigation problems, such as Detailed Solutions to 100 Problems in Celestial Navigation Anupam Singh Rajput's Practical Navigation Book Solution Land and Tactical Navigation practical navigation solutions pdf