12" Brushed Aluminum Arms Parallel Rule (Weems & Plath 140) Admiralty Tidal Charts NOAA Nautical Chart 16423: Shemya

NOAA Nautical Chart 16423: Shemya Island to Attu Island

2 Act of Voluntary Salvage

From understanding the latest ABYC standards for AC and DC wiring to effective methods for preventing corrosion

Flamborough Head to Blakeney Point is a standard nautical chart

Nantucket Shoals to Five Fathom Bank is a standard navigation chart used by commercial and recreational mariners alike

12" Brushed Aluminum Arms Parallel Rule (Weems & Plath 140) Admiralty Tidal Charts NOAA Nautical Chart 16423: ShemyaThis sturdy 12 inch (30. 48cm) parallel ruler with brushed aluminum arms is enscribed with a protractor scale. It is used to plot direction on a nautical chart from any convenient meridian or compass rose. The two straight edged rulers are connected to maintain the same angle. By walking the rules across the chart and securely holding down the non moving ruler, you can effectively plot a course. 12 inches (30. 48cm) long Includes protractor scale