Orthodoxal navigation. Or, The admirable and excellent art of arithmeticall great circle-sailing [electronic resource] : inlarged and applied to places of all situations. And many difficulties removed, and sundry things now added, that were never published before. Whereby, sailing by an arch of the great circle, extended from any one place, to any other place, (where possible and convenient) is made easie to the understanding of those of mean capacity, and ready to demonstrate with facility, and suiting with the marriners haste, by a speedy dispatch, when he hath but a short opportunity. Together with a new and true paradoxal chart. By Benjamin Hubbard, late student of the mathematicks in Charls Towne in New-England.