Classical Hydrography, Bathymetric Surveys & Coastal Geodesy — Field Guide & Journal

ADMIRALTY DISPATCH Navigational notices and coastal sounding calibrations issued under hydrographic survey standards.

The Mathematics of Mercator Projections: Rhumb Line Accuracy and High-Latitude Distortion

Why constant compass headings plot as straight lines on conformal cylindrical projections despite severe polar surface enlargement.

Celestial Sights

How angular measurements between the lunar limb and zodiacal stars allowed longitude determination aboard sailing frigates.

October 03, 2026 • 10 min read

Sounding Grids

Operational mechanics of surveying uncharted shoals with armed lead weights and calibrated hemp sounding lines.

September 21, 2026 • 7 min read

Tidal Engines

How brass gears, pulleys, and wire linkages mechanically summed lunar and solar orbital constituents into continuous tidal curves.

September 11, 2026 • 9 min read