How does a stadimeter work?

A stadimeter operator adjusts the lower knob until the top and bottom of the object are aligned, and then reads the corresponding range off the edge of the lower knob through a small magnifying lens.

When was the stadimeter invented?

Figure 1: The 1943 U.S. Navy stadimeter by Schick incorporated. The stadimeter was developed in the 1890s by Bradley Allen Fiske (1854-1942), a Lieutenant in the United States Navy who had access to a laboratory in New York City that was fully backed by the Western Electric Manufacturing Co.

How periscope used during World War II?

In theory, the periscope is a very simple piece of tech which consists of two reflecting prisms or mirrors at 45° angles to one another. In WWII, periscopes were used in tanks so that the driver, gunner and commander might observe their surroundings, as well as for aim.

What is Stadimetry?

Explanation: Stadimetry is a technique used to determine the object distance from a vision system camera. It is a direct imaging technique in which distance of the object is determined by the apparent size of object in the field of view of camera.

How does the stadimeter work on a submarine?

Using the formula R=h/tan ( q) this means that the target is four nautical miles from the submarine. The stadimeter does this internally, without the need for the captain or approach officer to calculate it, and indicates that the target is 8,100 yards away.

What are the rules of unrestricted submarine warfare?

German U-boat. Unrestricted submarine warfare is a type of naval warfare in which submarines sink vessels such as freighters and tankers without warning, as opposed to attacks per prize rules (also known as ” cruiser rules “). Prize rules call for submarines to surface and search merchantmen and place crews in “a place of safety”

How does a submarine combat management system work?

The system infrastructure is based on a dual-redundant large bandwidth Ethernet databus to integrate all acoustic and non-acoustic sensor inputs, weapons, navigation systems, and command and weapon control functions on twin-screen multifunction consoles.

What are the rules for winning a submarine Prize?

Prize rules call for submarines to surface and search merchantmen and place crews in “a place of safety” (for which lifeboats did not qualify, except under particular circumstances) before sinking them, unless the ship showed “persistent refusal to stop or active resistance to visit or search”.