Again, thanks for the responses. I had to chuckle when Les made his comment about the only reason to do the math for dip was for the fun of it. Right on! I’ve never thought it critical one way or another. Raymarine suggests that the installer provide for it – hence my initial question.
I also like to plan trips. Planning extends my cruising range and counts as next best to cruising. The best thing about the math and the planning is that they can be classified as boating activity.
:arrow: Les,
The arches I’ve seen look good and you make strong points in their favor. I don’t think I could find one in the Keys and get it installed in the next three weeks. If I get out to the NW and am dissatisfied with the 5 inch mount, I may order one. Where do I get details?
:arrow: Tyboo
I’m counting.
Unless the tangent of an angle increases with latitude or westing, ( ask Charlie, he knows those sort of things) your Autocad, or, both my Excel and Texas Instruments calculator need calibrating.
My TI calculator gives for
5 Tan(5 degrees) = 0.437443318
And Excel for
=5*TAN(RADIANS(5)) = 0.437443318
Best to all