H S Blackburne

Modern Up-To-Date Navigation: Position Finding By The Improved Sumner Method, Contrasted With The New Navigation And The Old Sumner Method (1914)

H S Blackburne

$14.36 - $22.69

Tables for azimuths, great-circle sailing, and reduction to the meridian: with a new and improved "Sumner" method; latitudes 90⁰ N. to 90⁰ S., declinations 90⁰ N. to 90⁰ S.

H S Blackburne

$26.80

Tables of Alculated Hour-Angles and Altitude Azimuth Table 30N. to 30S

H S Blackburne

Out of Stock

Tables for Azimuths, Great-Circle Sailing and Reduction to the Meridian

H S Blackburne

Out of Stock