Sunday, August 23, 2009
Monday, August 10, 2009
Friday, August 7, 2009
A pair of swiveled double blocks with becket and sheave ball bearings using regatta braided line will help the rigger get aloft in a Bos'n chair with less effort by applying a low friction five to one mechanical advantage. The regatta braided line will have to be five times the height of the mast to ascend completely to the top.
Wednesday, August 5, 2009
Label a plotting triangle with celestial triangle solution formulae and you have a very good companion to a scientific calculator. Formulae includes azimuth, altitude , and prime vertical. For online calculations go to :