Dear all, I was also convinced of the advantages of using a compass. Now I have to decide which one to buy. I need a compass that I can easily use on different hulls, so the Silva 103 mounted on the "Spider" seemed to most reasonable for me. (correct?) But,the Silva 103 is available as 103R with a tactical scale or as 103RE with two 360° scales shifted according to the position of the lubber lines. Which one would you prefer? Any opinions or recommendations? Thanks in advance.