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2. FCS (fins) - Wikipedia

   en.wikipedia.org/wiki/FCS_(fins)

   FCS (Fin Control System) is a brand, as well as type, of fin set-up which allows for more versatility in the placement and style of the fins attached to a surfboard. The FCS style can be used as the traditional tri-fin placement (thruster), a two fin (twin), a four fin (quad), or a five fin set up. The tri-fin refers to a setup with three fins ...

3. Heritage-class cutter - Wikipedia

   en.wikipedia.org/wiki/Heritage-class_cutter

   The Heritage-class cutter, also known as the Offshore Patrol Cutter and the Maritime Security Cutter, Medium, is a cutter class of the United States Coast Guard (USCG), developed as part of the Integrated Deepwater System Program and built by Eastern Shipbuilding [4] and Austal USA. [5] Construction of the first vessel in the class began in ...

4. FCS-2 - Wikipedia

   en.wikipedia.org/wiki/FCS-2

   FCS-2-21A is a simplified version specialized in gun fire-control, adding an electro-optical tracker on the left side of tracking radar antenna and omitting the search radar antenna. [4] And a FCS-2-21B was installed on the destroyer escort Ishikari , which introduced a Passive electronically scanned array antenna instead of a cassegrain ...

5. Tunnel fin - Wikipedia

   en.wikipedia.org/wiki/Tunnel_fin

   Tunnel fins have the ability to enhance hydrodynamics by slightly twisting the water flow into a vortex as it passes through the tunnel, preventing random turbulence in its wake. The tunnel fin has a large amount of horizontal lift utilizing the hydrofoil principle providing better lift-to-drag ratio .

6. Ship gun fire-control system - Wikipedia

   en.wikipedia.org/wiki/Ship_gun_fire-control_system

   Mark 37 Director c1944 with Mark 12 (rectangular antenna) and Mark 22 "orange peel" Ship gun fire-control systems (GFCS) are analogue fire-control systems that were used aboard naval warships prior to modern electronic computerized systems, to control targeting of guns against surface ships, aircraft, and shore targets, with either optical or radar sighting.

7. Fin (extended surface) - Wikipedia

   en.wikipedia.org/wiki/Fin_(extended_surface)

   This is the ratio of the fin heat transfer rate to the heat transfer rate of the fin if the entire fin were at the base temperature, = ˙. in this equation is equal to the surface area of the fin. The fin efficiency will always be less than one, as assuming the temperature throughout the fin is at the base temperature would increase the heat ...