Naval Ordnance and Ship Systems Review

Comprehensive vocabulary flashcards covering naval ordnance, gun operations, ship structural components, signaling equipment, and auxiliary systems.

Explosive Ordinance

One of the two primary classifications of naval ordnance, including examples such as gun ammunition, torpedoes, mines, bombs, and rockets.

Inert Ordinance

One of the primary classifications of ordnance that does not contain explosive material.

Automatic Gun

Guns that use some of the energy of the explosion to open the breech, eject the empty case and automatically load another round.

Semi-Automatic Gun

Guns that use some of the energy of the explosion to open the breech, eject the empty case, but require manual or auxiliary loading of the next round.

Non-Automatic Gun

Guns in which none of the energy of the explosion of the propellant is used to perform breech opening or loading and unloading functions.

Interior Ballistics

One of the two main classifications of ballistics dealing with characteristics inside the gun.

Exterior Ballistics

One of the two main classifications of ballistics dealing with the motion of the projectile after it leaves the gun.

Train

The position of the axis of the gun bore in azimuth as measured from the ship's centerline.

Elevation

One of the basic gun positions and movements alongside train, recoil, and counterrecoil.

Recoil

The rearward movement of the gun upon firing.

Counterrecoil

It is forward movement of the gun after recoil which returns the gun into battery.

In Battery

The gun is said to be in this position when it is ready to fire.

Directional Flashing Light

Signals are sent out by signal searchlight that is pointed and trained directly ate the receiver so as to be visible through limited area.

Non-directional Flashing Light

Signals are sent out from yardarm blinkers which are operated from the transmissions key located in the pilot house or on the signal bridge.

Watertight Bulkhead

A heavier metal then ordinary bulkhead used for structural integrity.

Collision Bulkhead

It is a watertight transverse bulkhead that protects the after part of the ship.

Hatches

A merely horizontal doors which are used for access through decks.

Gasket

Main closure fitting made of rubber installed on doors and hatches.

Knife Edges

Closure fittings built out from decks and bulkheads to ensure watertight integrity when pressed against a gasket.

Hoist (Flag Parts)

It is the vertical width of the flag when flying free.

Tabling

One of the four basic parts of a flag, alongside the flag itself, hoist, and tail line.

Tail Line

A short length of halyard attached to the lower part of the tabling and carrying the snap hook, it serves as the spacer separating the flags of a hoist for clearness.

Flag Bag

It is a bag of flame metal covered with canvass where signal bags are stowed.

Halyards

It is a light line used in bending flags numbered from out board to in board.

Tack Line

A $6\,ft$ length of halyard having a ring at one end and a snap hook at the other used to separate flags or groups of flags.

Electromechanical Steering Gear

One of the two basic types of steering gears used in naval vessels.

Electro-Hydraulic Steering Gear

A basic type of steering gear utilized for ship maneuverability.

Auxiliary Machinery and Equipment

It provides ship's smooth operation and personnel safety and comfort aboard ship.

Distilling Plants

It is used to supply fresh water for shipboard uses and boiler feed water.

Refrigeration Plant

A primarily used for food storage, water cooling, and ice making.

Ordnance

Physical equipment pertaining to weapons.

Gunnery

The art and science of using guns.

Caliber

It is the diameter of the bore measured between the top of the lands and its expressed in inches or millimeters.

Ballistics

The science of projectile motion.

Axis of the gun bore

A straight line passing through the center of the gun bore.

Gun Ammunition Components

The three components consisting of the Projectile, Propelling Charges, and Primer.