Quadrant

Quadrant

Two Quadrants

Quadrant

Protractor

Octant met toebehoren in mahoniehouten kist

Semi Circumferenter

Square and Level

Parallel Rule with Protractor and Plotting Scale

Model of a Support in a Dry Dock

Hollandse cirkel

Azimuth Compass

Portable Compass Sundial

Azimuth compass

Slide Scale

Model of a Chain Flange of a Capstan

Dipping Needle Compass

Sun Compass

Passer van messing en ijzer

Navigatie

Zonnewijzer van Wassenaar

Model of a 16-cm Gun on a Pivot and Slide on Part of a Gun Deck

Meetwiel met kegelgewicht

Model of a Gun on a Slide and Pivot

Model of Two Different Designs for the Gun Position on the Bow