TY  - BOOK
AU  - Smith,Archibald
ED  - Great Britain.
TI  - Supplement to the Practical rules for ascertaining the deviations of the compass which are caused by the ship's iron, being Instructions for the computation of a table of the deviations of a ship's compass, from observations made on 4, 8, 16, or 32 points
AV  - HF5721 .L56 1855
PY  - 1855///
CY  - London
PB  - Printed for the Hydrographic office, Admiralty
KW  - Compass
KW  - Magnetism of ships
ER  -