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Stepped reckoner. Private Collection.
HRM22A90_064

Stepped reckoner. Private Collection.

Plotter, Protractor, Pioneer Instrument, Mark II. Creator: Pioneer Instrument Company.
HRM21A88_293

Plotter, Protractor, Pioneer Instrument, Mark II. ...

Dead Reckoning, E-6B, Prototype, 1942. Creator: Felsenthal Instrument Co.
HRM21A88_495

Dead Reckoning, E-6B, Prototype, 1942. Creator: Fe...

Computer, Weems E-1B Navigational. Creator: Weems System of Navigation.
HRM21A88_304

Computer, Weems E-1B Navigational. Creator: Weems ...

Circular Slide Rule, William J. Powell, 1935. Creator: Unknown.
HRM21A88_460

Circular Slide Rule, William J. Powell, 1935. Crea...

Computer, Weems E-1B Navigational. Creator: Weems System of Navigation.
HRM21A86_447

Computer, Weems E-1B Navigational. Creator: Weems ...

Plotting Board, Navy, Mark 3A, 1942. Creator: Felsenthal Instrument Co.
HRM21A88_482

Plotting Board, Navy, Mark 3A, 1942. Creator: Fels...

Plotter, Drift, ca. 1918. Creator: CP Goerz.
HRM21A88_045

Plotter, Drift, ca. 1918. Creator: CP Goerz.

Type AN 5835-1 dead reckoning computer owned by Fenton B. Sands, 1944-1948. Creator: J. B. Carroll Company.
HRM21A73_431

Type AN 5835-1 dead reckoning computer owned by Fe...