Harold Sewallis Blackburne

Tables of calculated hour-angles and altitude azimuth table 30N. to 30S. Ex-meridian tables 70N. to

Harold Sewallis Blackburne

$26.95

Tables for Azimuths, Great-Circle Sailing, and Reduction to the Meridian, with a New and Improved "Sumner" Method: Latitudes 900 N. to 900 S., ... with Numerous Examples of Double Altitudes

Harold Sewallis Blackburne

$22.56

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

Harold Sewallis Blackburne

$14.36 - $23.00

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.

Harold Sewallis Blackburne

$26.63

Tables for Azimuths, Great-Circle Sailing, and Reduction to the Meridian, with a New and Improved Sumner Method: Latitudes 90 N. to 90 S., Declinations 90 N. to 90 S.: Also Other Useful Navigational T

Harold Sewallis Blackburne

Out of Stock

Position Finding by the Improved Sumner Method: Contrasted with the New ...

Harold Sewallis Blackburne

Out of Stock

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

Harold Sewallis Blackburne

Out of Stock

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

Harold Sewallis Blackburne

Out of Stock

Position Finding by the Improved Sumner Method: Contrasted With the New Navigation (Marcq St. Hilaire System), and the Old Sumner Method; Together With a Few Special Star Reduction and Azimuth Tables

Harold Sewallis Blackburne

Out of Stock

Tables for Azimuths, Great-Circle Sailing, and Reduction to the Meridian, With a New and Improved Sumner Method: Latitudes 900 N. to 900 S., ... With Numerous Examples of Double Altitudes

Harold Sewallis Blackburne

Out of Stock