Gunners Mate Exam Flashcards

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Questions and Answers

What are the Weapon Commands issued to those on the firing line and how many commands are there?

There are six commands: Load, Make Ready, Fire, Cease Fire, Unload, and Unload, Show Clear.

What is Article 107?

It punishes anyone who, with intent to deceive, signs a false official document or makes a false official statement.

How many different types of bearings are there and how are they measured?

There are three types: Relative, True, and Magnetic. They are measured in degrees from 000° to 360°.

How many different 'Flagstaff' insignias are there and what do they mean?

There are five insignias: Spread Eagle, Halbert, Ball, Star, and Flat Truck, each indicating different ranks and honors. Signup and view all the answers

During the Civil War, which admiral gave the famous order, 'Damn the Torpedoes! Full speed ahead' and during what battle?

Admiral Farragut gave the order during the Battle of Mobile Bay. Signup and view all the answers

What are three advantages of using nylon line over natural fiber line?

Nylon line is 2.5 times stronger, has greater strength and elasticity, and has better weather resistance. Signup and view all the answers

What is the purpose of the HE-CVT round?

It provides an air burst over land or water targets using an active radio frequency fuze. Signup and view all the answers

What is the purpose of a Combat Systems Alignment?

It measures and corrects pointing or directional errors between combat system equipment. Signup and view all the answers

What do Misfire, Hangfire, and Cookoff mean?

Misfire is a complete failure to fire; Hangfire is a delay in firing; Cookoff is the unintended firing of a round due to heat. Signup and view all the answers

What initiator activates the igniter battery of a Mk 58 marine location marker?

Seawater Signup and view all the answers

A Mk 58 Marine location marker should burn for approximately what maximum number of minutes?

40 to 60 mins Signup and view all the answers

The pull ring of a Mk 6 marine location marker activates what device or solution?

90 second delay fuse Signup and view all the answers

When conducting a man overboard drill, which marine location marker should you use, if available?

Mk 6 Signup and view all the answers

How is the color of a Mk 2 marine illumination signal determined at night?

By the texture of the closing wad Signup and view all the answers

The star of a Mk 2 marine illumination signal should burn for approximately what maximum number of seconds?

6 seconds Signup and view all the answers

The Mk 5 pyrotechnic pistol should be fired at what angle?

60 degrees Signup and view all the answers

Why should unfired signals not be left in the Mk 5 pyrotechnic pistol?

The pistol is always cocked when the breech is closed. Signup and view all the answers

What type of signal is produced by the Mk 1 Mod 1 marine illumination signal?

A red, green, or yellow 7 to 11 second star Signup and view all the answers

Which of the following signals is not designed to be fired from the AN-M8 pyrotechnic pistol?

Mk 2 marine illumination signal Signup and view all the answers

What color smoke is produced by the Mk 13 marine smoke and illumination signal?

Orange Signup and view all the answers

At night, what feature identifies the flame end of a Mk 13 marine smoke and illumination signal?

Three beads on the plastic cap Signup and view all the answers

How is the flame end of a Mk 13 marine smoke and illumination signal ignited?

With a pull ring Signup and view all the answers

What should be done with a Mk 1 Navy light that gives off a vinegar smell?

It should be disposed of immediately. Signup and view all the answers

What total number of signals is contained in the Mk 79 Mod 2 personnel distress kit?

7 Signup and view all the answers

What color star signal is fired from the Mk 79 Mod 0 personnel distress kit?

Red Signup and view all the answers

If fired, what danger does a dented Mk 80 hand-fired signal pose?

It may react violently. Signup and view all the answers

What characteristics of pyrotechnics should ordnance handlers be constantly aware of?

Some are intended to burn with intense heat. Signup and view all the answers

What effects can moisture have on pyrotechnic devices?

It can make them more sensitive and dangerous, less dependable, and more difficult to ignite. Signup and view all the answers

Navy pyrotechnics are designed to withstand which maximum temperature ranges?

65F to 160F Signup and view all the answers

The smoke and fumes of Navy pyrotechnics are non-toxic and cause only mild irritation to the eyes and nasal passages of personnel when exposed in any concentration.

False Signup and view all the answers

When handled properly, Navy ordnance is relatively safe.

True Signup and view all the answers

Ordnance safety regulations may be waived only by area commanders.

True Signup and view all the answers

What factor causes the majority of ordnance safety regulations to be written?

Actual disasters Signup and view all the answers

Personnel who routinely handle explosives must guard against what personal characteristic?

Familiarity Signup and view all the answers

What term describes the type of ammunition assembly that consists of two pieces rammed together as a single unit?

Separated Signup and view all the answers

What ammunition assembly classification includes small arms?

Fixed Signup and view all the answers

What term describes ammunition designed for use in combat?

Service Signup and view all the answers

What type of ammunition is not designed to be fired from a gun?

Drill Signup and view all the answers

How are fragmentation projectiles constructed?

With thin walls and a large explosive capacity. Signup and view all the answers

What term describes the machined surface of a gun projectile that stabilizes it as it passes through the gun bore?

Bourrelet Signup and view all the answers

What is the function of a cannelure on a gun projectile?

To collect copper wiped from the rotating band. Signup and view all the answers

What component of a gun projectile acts as a seal preventing the escape of propellant gases?

Rotating band Signup and view all the answers

What type of projectile is fitted with a base fuse only?

AP (armor piercing) Signup and view all the answers

What type of projectile is designed to penetrate one third of their caliber armor?

COM Signup and view all the answers

What type of projectile has a backup point detonating fuse that operates in case of primary fuse failure?

HE-MT/PD Signup and view all the answers

What device serves to ignite the expelling charge of an illumination projectile?

The time fuse Signup and view all the answers

What is the function of the wad and distance piece in a case-type propelling charge?

To keep the powder charge tightly packed in the case. Signup and view all the answers

What type of propelling charge is often used in firing on reverse-slope targets?

Reduced Signup and view all the answers

What force of inertia is used to operate the fuse clockwork of most mechanical time fuses?

Centrifugal force Signup and view all the answers

What force of inertia is used to align the fuse firing mechanism so that it will function on impact?

Creep Signup and view all the answers

What term describes the fuse safety feature that requires a projectile to be fired and clear of the muzzle before its fuse arms?

Boresafe Signup and view all the answers

What type of projectile is painted olive drab with a yellow band around the ogive?

HE Signup and view all the answers

In the new lot numbering system, what information directly follows the manufacturers ID symbol?

The year and month of manufacture. Signup and view all the answers

What year was the new lot numbering system implemented?

1978 Signup and view all the answers

What projectile has light green body coding?

WP Signup and view all the answers

What level of ammunition inventory accuracy is required by the CNO?

99.5 Percent Signup and view all the answers

What responsibility does a GM3 have in maintaining an accurate ammunition ledger?

To make sure that ammunition items expended are identified and quantities reported. Signup and view all the answers

How many MSRCs are required to record 1,000 rounds of .45 caliber ammunition, NALC/DODIC A475, consisting of three lots, if 400 rounds are condition code A and 600 rounds are condition code B?

3 Signup and view all the answers

The maintenance due date of a missile is recorded in what location on an ammunition ledger?

On the serial/location card Signup and view all the answers

What chapter of SPCCINST 8010.12 provides detailed instructions on the makeup and maintenance of the ammunition ledger?

12 Signup and view all the answers

Where is the ATR file kept?

In a file with the ledger Signup and view all the answers

What document lists the types and quantities of ammunition that are authorized for issue to a particular ship?

The CAIMS manual Signup and view all the answers

What format is used for ordering ammunition?

MILSTRIP in a naval message Signup and view all the answers

What chapter of the CAIMS manual describes the preparation of an ammunition requisition?

8 Signup and view all the answers

What is the purpose of a gas check seal?

To prevent propellant gases from penetrating into the explosive cavity of a projectile. Signup and view all the answers

What type of projectile is fitted with a gas check seal?

Those with either a base plug or base fuse. Signup and view all the answers

What publication contains the complete description of how to inspect projectile gas check seals?

NAVSEA SW030-AA-MMO-010 Signup and view all the answers

What type of magazine is located in the immediate vicinity of the weapon it serves?

Ready service stowage Signup and view all the answers

What type of magazine is designed to hold a ship's entire peacetime allowance of ammunition?

Primary Signup and view all the answers

What type of magazine provides permanent stowage of ammunition convenient to the weapon that it serves?

Ready-service magazine Signup and view all the answers

Who is the custodian of all magazine keys aboard ship?

The commanding officer Signup and view all the answers

What is considered the controlled area on a ship armed with nuclear weapons?

The entire ship Signup and view all the answers

What is the primary source of magazine inspection criterion?

MRCs Signup and view all the answers

What is the main purpose of the daily magazine inspection?

To check and record temperatures Signup and view all the answers

Magazine inspection MRCs contain the same criteria as is used by what inspection team?

ESI Signup and view all the answers

On the daily magazine temperature report, magazines are stated to be in satisfactory condition if they meet what requirements?

MRC Signup and view all the answers

What is the purpose of the exhaust ventilator pipe and check valve in shipboard magazines?

To vent pressure when the space is flooded by the sprinkler system. Signup and view all the answers

What type of magazine sprinkler system is normally used in gun ammunition magazines?

Dry type Signup and view all the answers

With what minimum firemain pressure are sprinkler control valves designed to operate?

40 psi Signup and view all the answers

What type of pressure holds a class 2 valve closed?

Firemain pressure only Signup and view all the answers

What factor allows firemain operating pressure to overcome fire main pressure acting on the valve disk?

The area of the lower diaphragm washer is larger than that of the valve disk. Signup and view all the answers

What type of powder is found in all 5"/54 full charges?

SPCF - is a single-base smokeless powder similar to SPC type powder but containing a flash suppressor. Signup and view all the answers

What is black powder composed of?

The ingredients include saltpeter (potassium nitrate or sodium nitrate), charcoal, and sulfur. Signup and view all the answers

What is PBXN-106?

PBXN-106 is a cast-cured explosive composition made from a homogenous mixture of RDX in a plasticized polyurethane rubber matrix. Signup and view all the answers

What is the primary marine location marker used for man-overboard and how long does it burn?

The Mk 58 marine location marker burns for approximately 40 to 60 minutes. Signup and view all the answers

What are the different types and speed ranges for guided missiles?

Guided missiles are classified into subsonic (up to Mach 0.8), transonic (Mach 0.8 to Mach 1.2), supersonic (Mach 1.2 to Mach 5.0), and hypersonic (above Mach 5.0). Signup and view all the answers

What are the 4 principal forces that affect a missile in level flight?

Thrust, drag, weight, and lift. Signup and view all the answers

How many modes of fire does the Mk38 mod 2 have and what are their rates of fire?

Single Shot: 1 round per trigger press; Low Burst: 3 rounds at 100 r/min; High Burst: 5 rounds at 180 r/min; Low Cont: at 100 r/min; High Cont: at 180 r/min. Signup and view all the answers

How many feeds does the MK46 mod 2 GWS have and what is its rate of fire?

The system has a magazine capacity of 400 rounds and a firing rate of 200 rounds per minute. Signup and view all the answers

How does a solenoid work?

Solenoids convert electrical inputs into mechanical outputs for actuating mechanisms. Signup and view all the answers

What is the sprinkler system layout comprised of in an 8 module launcher?

The system consists of 30 sprinkler heads and 11 Heat-Sensing Devices. Signup and view all the answers

In what year did the Beretta M9 come into service and what is its life expectancy?

1994 / life expectancy 15000 rnds. Signup and view all the answers

In regards to Ammo Admin, how would you break down the following req#: R5568760261587?

R55687 (UIC) 6 (year-2016) 026 (Julian date-Jan 26) 1587 (Sequence Number of Document). Signup and view all the answers

For ammo sentencing, what does the following defect code ZAAA36 mean and how is it broken down?

Z (No status code) AA (Assembly/complete round) A (Classification directed NAVSUP-P801 NAR) 36 (failed environmental test). Signup and view all the answers

What color MIL-STD 129 tags do we have and what do they mean?

Yellow denotes Serviceable, Green denotes Repairable, Blue denotes Test/Mod, Brown denotes Suspended, and Red denotes Unserviceable. Signup and view all the answers

What publication would you refer to for Ammo Sentencing?

NAVSUP P-805 Signup and view all the answers

What is the 8020/5 and who must sign it?

It lists each family group/task the member is certified in and must be signed by the board chairman, board member, and individual. Signup and view all the answers

What is the Qual-Cert instruction?

OPNAVINST 8023.24C Signup and view all the answers

What is a OPREP-3 Navy Blue incident report and what are some things that would require one?

It includes significant incidents such as armed robberies, evidence of terrorism, or loss of Category I/II munitions. Signup and view all the answers

Can we store non-government AA&E (personal weapons) and who can authorize it?

Storage is authorized by the Commanding General/Commanding Officer or designated representative in writing. Signup and view all the answers

Study Notes

Marine Location Markers

The Mk 58 marine location marker is activated by seawater and burns for 40 to 60 minutes.
The Mk 6 marine location marker is preferable for man overboard drills and features a pull ring that activates a 90-second delay fuse.
The color of the Mk 2 marine illumination signal is determined by the texture of the closing wad, burning for approximately 6 seconds.
The Mk 13 marine smoke and illumination signal produces orange smoke and has a flame end identifiable by three beads on the plastic cap.

Pyrotechnics Safety and Handling

Unfired signals should not remain in the Mk 5 pyrotechnic pistol as it is always cocked when the breech is closed.
Ordnance handlers must be aware that some pyrotechnics can burn with intense heat and that moisture can make them more sensitive or difficult to ignite.
The Navy pyrotechnics can typically withstand temperatures from 65°F to 160°F.

Ammunition and Ordnance

Familiarity can lead to complacency, and personnel must be cautious when handling explosives.
Ammunition classifications include fixed (small-arms), separated (two-piece assembly), drill (not for firing), and service (designed for combat).
The Mk 79 Mod 2 personnel distress kit contains seven signals, with the Mk 79 Mod 0 providing a red star signal.
A dented Mk 80 hand-fired signal poses a risk of violent reaction if fired.

Missile and Projectile Dynamics

Guided missiles are classified by speed: subsonic (up to Mach 0.8), transonic (Mach 0.8 to 1.2), supersonic (Mach 1.2 to 5.0), and hypersonic (above Mach 5).
Four principal aerodynamic forces acting on missiles in flight are thrust (forward propulsion), drag (air resistance), weight (gravity), and lift (upward force).

Fire Control and Maintenance

The Mk 38 mod 2 has multiple firing modes, including single shot, low burst, high burst, low continuous, and high continuous.
The MK46 mod 2 GWS features a 400-round magazine capacity with a dual-feed mechanism, firing at 200 rounds per minute.
The purpose of the daily magazine inspection is to monitor temperature and ensure proper conditions for ammunition storage.

Regulatory Compliance and Documentation

Each family group of ammunition requires certification on the 8020/5 form, which must be signed by the board chairman, board members, and the individual being certified.
The CAIMS manual lists the types and quantities of ammunition authorized for issue on specific ships.
The MIL-STD 129 color tags indicate the status of ammunition: yellow for serviceable, green for repairable, red for unserviceable, etc.

Reporting and Incident Management

OPREP-3 Navy Blue incident reports are required for specific incidents involving significant quantities of weapons or ammunition and significant occurrences like armed robberies or terrorist involvement.
Non-government AA&E (personal weapons) storage is authorized by the commanding officer and must be separate from government AA&E storage.

Bearings and Navigational Insignias

Bearings are classified as relative, true, or magnetic, and measured in degrees from 000° to 360°.
Boats for personal use by officers or with civil officials on official business display special flagstaff insignias.### Flagstaff Devices
Spread Eagle: Used for civilian officials or flag officers with an official salute of 19 guns or more.
Halbert: Designated for flag or general officers with salutes less than 19 guns, or civil officials with salutes between 11 and 19 guns.
Ball: For officers of captain rank or equivalent in the Navy, and certain diplomatic officials.
Star: Indicates officers of commander rank or equivalent.
Flat Truck: For officers below commander grade and civil officials with lesser honors.

Civil War Battle of Mobile Bay

Admiral Farragut commanded the U.S. Navy during the Civil War.
Famous order: "Damn the Torpedoes! Full speed ahead."

Advantages of Nylon Line

Strength: Nylon is 2.5 times stronger than natural fiber lines.
Elasticity: Offers greater strength and elasticity than natural fibers.
Weather Resistance: Superior resistance to weather conditions.

HE-CVT Round Purpose

The HE-CVT round creates an air burst over land or water using an active radio frequency fuze.

Combat Systems Alignment (CSA)

CSA ensures correct alignment and direction for combat system equipment and elements.

Definitions: Misfire, Hangfire, Cookoff

Misfire: Complete failure to fire; may resemble a hangfire or delay in firing mechanism. Caution is necessary before opening the bolt.
Hangfire: Delay in the propelling charge; unpredictable duration. A prescribed time must be observed before opening the bolt.
Cookoff: Occurs when a hot weapon causes the round to fire without a trigger pull. Immediate action is needed for rounds in a hot weapon to prevent unintended firing.

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Description

Prepare for the Gunners Mate exam with these flashcards covering essential topics related to marine location markers. This quiz includes questions on the Mk 58 and Mk 6 markers, their activation methods, burn times, and safety mechanisms. Test your knowledge and improve your understanding of marine safety equipment.