
1847 / Book or monograph
A Code of Signals ... in the Merchant Service
Communication, telegraphy and codes · Navigation, seamanship and maritime practice
271 pages Open documentOpening preserved document…

Bibliographic identity checked against available scan and source evidence.
obscure/nautical-almanac-1767.pdf
SHA-256: 6161787ef19d007bab7016da6da6df6e9f13d8e504b05f810ea0b5ca08fbd993
Catalogue reviewed 19 September 2026. Original scans retained; catalogue labels do not endorse historical claims.