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2. List of the United States Army fire control and sighting ...

   en.wikipedia.org/wiki/List_of_the_United_States...

   This is a list of United States Army fire control, and sighting material by supply catalog designation, or Standard Nomenclature List (SNL) group "F".The United States Army Ordnance Corps Supply Catalog used an alpha-numeric nomenclature system from about the mid-1920s to about 1958.

3. List of telescope parts and construction - Wikipedia

   en.wikipedia.org/wiki/List_of_telescope_parts...

   Star Diagonal: Used to change the angle of the light coming out of a telescope, for easier viewing. Herschel Wedge: Similar to a star diagonal with a wedge-shaped unsilvered prism reflector that reduces incoming light by up to 95% for solar viewing. Coma corrector a correcting lens used to reduce coma distortion in fast reflecting telescopes.

4. Navigation light - Wikipedia

   en.wikipedia.org/wiki/Navigation_light

   Watercraft navigation lights must permit other vessels to determine the type and relative angle of a vessel, and thus decide if there is a danger of collision. In general, sailing vessels are required to carry a green light that shines from dead ahead to 2 points (22 + 1 ⁄ 2 °) abaft [note 1] the beam on the starboard side (the right side from the perspective of someone on board facing ...

5. Engine order telegraph - Wikipedia

   en.wikipedia.org/wiki/Engine_order_telegraph

   On most modern vessels with direct combustion engines or electric propulsors, the main control handle on the bridge acts as a direct throttle with no intervening engine room personnel. As such, it is regarded under the rules of marine classification societies as a remote control device rather than an EOT, though it is still often referred to by ...

6. Azimuth thruster - Wikipedia

   en.wikipedia.org/wiki/Azimuth_thruster

   There are two major variants, based on the location of the motor: [citation needed] Mechanical transmission, which connects a motor inside the ship to the outboard unit by gearing. The motor may be diesel or diesel-electric. Depending on the shaft arrangement, mechanical azimuth thrusters are divided into L-drive and Z-drive. An L-drive ...

7. Aids to Navigation Boat - Wikipedia

   en.wikipedia.org/wiki/Aids_to_Navigation_Boat

   It has a higher capacity crane, with a longer reach and a large "V" cut into the stern platform to allow the boat to more readily maintain contact with an aid even under wave conditions. It is powered by two 825 hp DD 12V71TA two stroke diesel engines and has a 7.5 kW diesel generator to provide air conditioning/heat, power for a full galley ...

8. Telescoping (mechanics) - Wikipedia

   en.wikipedia.org/wiki/Telescoping_(mechanics)

   Telescoping in mechanics describes the movement of one part sliding out from another, lengthening an object (such as a telescope or the lift arm of an aerial work platform) from its rest state. [1] In modern equipment this can be achieved by a hydraulics , but pulleys are generally used for simpler designs such as extendable ladders and amateur ...

9. Stern - Wikipedia

   en.wikipedia.org/wiki/Stern

   This is an accepted version of this page This is the latest accepted revision, reviewed on 18 January 2025. Back or aft-most part of a ship or boat For other uses, see Stern (disambiguation). Detailed schematic of an elliptical or "fantail" stern The flat transom stern of the cargo ship Sichem Princess Marie-Chantal The stern is the back or aft -most part of a ship or boat, technically defined ...