WEPS Flashcards
MK 38 Mod 2
Electrically operated chain gun
Consists of a MK 48 Mod 0 Electro-Optical Surveillance (EOS) System and M242 25mm Automatic Gun
Ammunition Capacity: 168 rounds (84 in each box)
Maximum Range: 4.1 miles
Maximum Effective: 2700 yds
Round Type: 25MM
SAP/HEI-T – Light or no armor
TP-T – Personnel or training
Fired From: ROC (Remote Operated Console) located starboard side of pilot house and locally at the gun mounts.
MK 38 Mod 2 Modes of Operation
Surveillance Mode- Weapon station is stationary and only the on mount EOS is driven.
Engagement Mode- Main operational mode, used for initiating fire upon acquired targets. In ENG mode the gun follows the EOS LOS.
Service Operation Mode- Designed primarily for maintenance procedures, but can be used as a backup operational mode in the event of failure in the stabilization circuits.
Manual Operation Mode- Emergency backup mode to be used in the event of total failure in the drive system. Disengages the drive system and control is given to a local operator at the turret itself.
MK 38 Mod 2 Safety Features - Sector Limits
Software- Compares the readings of the resolvers against the defined sectors and does not allow firing or motion outside of fire sectors. This is considered a “Soft Stop.”
Electrical- Proximity switches (traverse only). When activated, the switches shift the system to Surveillance mode and disable fire. Firing/Engagement mode is enabled only after manually returning gun to the firing sector.
Mechanical- Mechanical stoppers are positioned to prevent the gun from exceeding the limits which endanger personnel or equipment on the ship.
Hot Gun
Amount of rounds fired through a gun to heat the chamber which could cause cook-off of rounds.
Hang Fire
When weapon is fired there is a delay in the projectile leaving the barrel.
Misfire
Failure of a round to fire.
Run Away Gun
When a gun continues to fire after trigger is released.
Close-In Weapon System (CIWS)
Primary Mission: Ships last line of defense against Anti-Ship Cruise Missiles
Secondary Mission: Engage FAC/FIAC and low slow fliers
Close-In Weapon System (CIWS) Inputs
440 VAC 60 HZ 3 Phase (Ships Power)
Firemain (Primary Cooling Loop)
Close-In Weapon System (CIWS) Mount
MT 22:
Her Name: Pele
Type: Block 1B Baseline 2
Close-In Weapon System (CIWS) Rate of Fire
For an AAW engagement CIWS fires 4500 Rnds/min
For an SUW engagement CIWS fires 3000 Rnds/min
Hot Gun: 300 rounds in 5 minutes or less.
Close-In Weapon System (CIWS) Drum Capacity
1500 Rounds
Close-In Weapon System (CIWS) Range
Maximum Range: 6 NM AAW, 4000 YDS SUW
Maximum Effective: 1 NM AAW, 2000 YDS SUW
Close-In Weapon System (CIWS) Components
Radar Weapon Group (the Mount) – Located on the aft missile deck behind FCS illuminators
Local Control Station (LCS) – Located in CIWS workshop
Remote Control Station (RCS) – Located in CIC between AAWC and MSS
Close-In Weapon System (CIWS) Firing Breaks
Clearing sector hold-back tool – mechanical safety designed to physically keep rounds from being chambered inside the gun. With tool installed, rounds will only cycle in the clearing path of the gun.
Fire Circuit Integrity Key (FIK) – a key that must be inserted to close the firing circuit to allow 300VDC to be sent to the firing contact on the gun.
Pre-arm/Arm/Safe – Button located on the LCS and RCS. When Pre-arm/Arm is selected, firing circuits are enabled.
Hold Fire – Button located on the LCS and RCS that will electrically prevent gun from firing while it is on.
Close-In Weapon System (CIWS) Modes of Operation
Air Ready: Primarily a maintenance mode. Everything is on. Motors have power, transmitter radiates into a dummy load, and search antenna is spinning. It’s like having your car on, but sitting in park. Has the ability to accept remote designations from WCS through the RCS which modes mode to AAW Auto and mount will slew and attempt to find target that WCS sent. Can fire in PAC (Pre-aim calibration) which aligns the track antenna to the gun to make sure the mount shoots where it’s pointing.
AAW Manual: Mount is actively searching for threats. Mount will move on its own towards a threat, when something meets engagement criteria, but will not fire unless the operator pushes the fire button.
AAW Auto: Same as AAW Manual except mount will fire on its own.
Surface: Uses the Phalanx Thermal Imager (PTI) to search for surface targets (FAC/FIAC) and low slow flyers (Helicopters, UAV). Operator manually moves mount via Fixed Hand Controller on the LCS or RCS. Has the ability to video track a target or can be used in a point and shoot way as well.
Anti-UAV: A new mode in B217, combining aspects of AAW and Surface modes to better engage UAVs utilizing both the PTI and Track antenna. The operator selects a target on the PPI and the mount will move to track it, at which point it can be engaged using 1.2 or 2 sec bursts.
Types of CIWS Rounds:
20MM Cartridge. Each projectile is encased in a colored Sabot (hard plastic covering). Projectiles are encased in the sabot to engage the barrel rifling. The projectile is smaller than the diameter of the barrel, due to the high rate of fire the gun produces we use a smaller round encased in plastic to extend barrel life.
DU- Depleted Uranium (Orange)
TN- Tungsten (White)
ELC- Enhanced Lethality Cartridge (Red)
We only carry the MK 244 Enhanced Lethality Cartridge onboard.
CIWS Loading
20MM rounds are carried in links to assist in storage and to facilitate loading. A loader unit is mounted to the front of the drum and linked ammunition is fed into the unit. At the point the Gun/Ammunition Handling System (GAHS) is rotated as the loader pulls the 20MM round out of its link and inserts it into the system, while simultaneously inserting a dummy round into the empty link to be removed. Even when CIWS isn’t loaded, a minimum of 1400 rounds of dummy ammunition are kept loaded in the drum to act as a counterbalance.
MK 45 Mod 4 5”/62
5” is an anti-air and surface weapon. Primarily used against inbound surface threats, it also has the ability to engage shore based targets, known as Naval Gun Fire Support. Fire control solutions are calculated utilizing the MK 160 Gun Fire Control System. The combination of MK 160, 5” and the Optical Sighting System makes up the MK 34 Gun Weapon System.
MK 45 Mod 4 5”/62 Mount
MT 51
Her Name Layla
MK 45 Mod 4 5”/62 Rate of Fire
16-20 rnds/min (Affected by elevation of the barrel and fuse type)
Hot Gun: 50 rounds in 4 hours
MK 45 Mod 4 5”/62 Drum Capacity
20 Rounds
MK 45 Mod 4 5”/62 Range
Max Range: 13 NM
Maximum Effective: Surface – 8-10 NM
Air – 4-6 NM
MK 45 Mod 4 5”/62
Barrel Length
310 Inches
MK 45 Mod 4 5”/62 Types of Rounds
5” shoots a 5” projectile backed by a separate powder charge
HE-CVT: High Explosive Controlled Variable Time – All-purpose surface round
HE-MFF: High Explosive Multi-Function Fuse – All-purpose air/surface round. Used within 7000 Yds. for FLAC
HE-MOF: High Explosive Multi-Option Fuse – All-purpose surface round, utilized Point Detonation (PD), PD Delay or CVT option
KE-ET: Kinetic Energy Electronically Timed – Used for small craft and High Speed Maneuverable Surface Targets (HSMST) at 4000 Yds. or less, filled with tungsten pellets
BL&P: Blind, Loaded and Plugged – Solid projectile filled with concrete. Used for Training
ILLUM: Illumination – Used to light up the battle field at night
VT-NON-FRAG: Variable Time Non-Fragmentation – “Puff” round. Used during training. Filed with talcum powder to simulate an explosion for spotting purposes
A yellow band around a projectile signifies HE, completely blue projectile signifies Training
5” Cycle of Operation
- Loaders put powder and projectile into the lower loading station / Deep Mag
- Pair goes up to the upper loading station and into the drum where the fuses are set / Loader Drum Room
- Upper Hoist puts round on the cradle
- Cradle aligns with the barrel / breech
- Rammer rams projectile into the barrel / breech
- Breech closes
- Boom
5” Operator Inputs
GFCS (Gun Fire Control Supervisor) “Guns” – Console in Combat Information Center. Located starboard side in between ASUWC and OSS Operators utilize the MK 160 program to send targeting information to the gun
EP2 – Local console operated by GM’s. Located in MT 51 in the Loader Drum Room. Allows for operation of the gun, and casualty control.
GMCP (Gun Mount Control Panel) – Console located in MT 51 Loader Drum Room. Component of MK 160. Allows for inputs to gun from MK 160.
OSS (Optical Sighting System) – Console located starboard side of CIC. Operates the MK 46 OSS . Capable of seeing targets in Daylight (DIS) and Thermal (TIS). Primarily used for Battle Damage Assessment (BDA), but can also be used to direct gun fire and spot.
5” can only be fired from GFCS, EP2 and the GMCP
MK 41 MOD 7 Vertical Launching System (VLS)
FWD Launcher:
Half launcher, made up of 32 Cells, 4 Modules
AFT Launcher:
Full launcher, made up of 64 Cells, 8 Modules
Each module is made up of 8 Cells. There are 12 Modules total.
Holds a total of 96 missiles
MK 41 MOD 7 Vertical Launching System (VLS) COMPONENTS
Launcher Control Unit (LCU):
CSER 1 (No. 1)
CSER 3 (No. 2)
Launcher Sequencer (LSEQ):
12; one per Module
Motor Control Panel (MCP):
12; one per Module
Programmable Power Supply:
24; two per Module
MK 41 MOD 7 Vertical Launching System (VLS) MISSILES
SM-2
SM-3
SM-6
ESSM
TLAM
VLA
SM-2
Primary Anti-Air weapon, secondary Anti-Suw, 80+ NM range
SM-3
Extended range missile, ICBM killer
SM-6
Air-defense weapon, protects against UAV, aircraft, ASCM and terminal ballistic missiles
ESSM
Evolved Sea Sparrow Missile, Anti-Air defense weapon, 1/2NM – 8NM range
TLAM
Tomahawk Land Attack Missile, smart missile utilized in Strike warfare
VLA
Vertically Launched Anti-Submarine Rocket (ASROC), 17,500 Yard range
VLS Deluge
-Cools missile warhead in the event of a restrained fire or over temperature condition
-Freshwater-Saltwater system
-Accumulator tank/freshwater system is pressurized to 225 PSI
-Freshwater holds Hy-check valve shut, fire main is introduced into the system when fresh water depletes and flows into each canister via deluge hose
MK 32 Mod 15 Surface Vessel Torpedo Tubes (SVTT)
Chung-Hoon has two mounts located port and starboard on the missile deck, consisting of three barrels each that have the capability to hold both MK 46 and MK 54 Torpedoes. SVTT is the primary surface ship close in anti-submarine weapon delivery system
MK 32 Mod 15 Surface Vessel Torpedo Tubes (SVTT) Firing criteria
-Weapon Ready/Torp Pre-set
-Flasks Charged (1600+/-50 PSI)
-Fire Sector Clear (Mount trained at a 45 degree angle)
SVTT MK 331 Mod 3 Torpedo Setting Panel (TSP)
Provides for the presetting of torpedoes and the remote electrical firing of the barrels
SVTT Weapon System High Pressure Air Compressor (WSHPAC)
- 2 onboard located in AFT WSHPAC Dog House on the AFT Missile deck and 5” Loader Drum Room.
- Delivers clean, dry, essentially oil-free compressed air to storage flasks.
Different Configurations of Torpedoes:
Rextorp: Inert, non-running (contains no fuel), recoverable, exercise torpedo.
Warshot: Goes boom, contains a warhead and has a long fuel tank.
Exercise: Similar to the warshot but the warhead is replaced by an exercise head and has a short fuel tank
MK 46
Older still capable torpedo
Mk 54
Newer weapon with better guidance system
MK 46/MK 54 Major Assemblies
Nose Section- Forward most section of the torpedo. Contains the transducer, guidance group assembly and guidance group shield. Warhead/Exercise Head- Warhead contains the explosive charge. The warhead weighs 98 lbs. Exercise head is to replace the warhead for exercise purposes.
Fuel Tank- Forms the fuel storage section of the torpedo. The long fuel tank contains 9 gallons of OTTO 2 Fuel and is used for Warshot torpedoes. The short fuel tank is used for Exercise torpedoes.
Afterbody: The aft section of the torpedo and contains the torpedo propulsion system.
MK 46/MK 54 Delivery methods
MH-60R/S and Maritime Patrol and Response Aircraft (MPRA: P-3/P-8, etc.) are longer range systems and are the preferred method of attack.
Vertical Launching System (VLS) is utilized to launch Vertical Launched Anti-Submarine Rocket (VLA) for engagements within 17,500 yards.
Surface Vessel Torpedo Tubes (SVTT) are used to conduct urgent attacks or counter fires which are our short range engagements
MK 46/MK 54 Safety precautions
Both, Mk 46 and 54, are fueled by OTTO Fuel II which is classified as a Class D fire. Its toxic smell can cause fainting and death. In case of a spill, a spill kit is located outside of CCS where yoke/mod-z is signed.
OTTO FUEL II SPILL
Major Spill- Any quantity of Otto Fuel II greater than one US quart.
Minor Spill- A minor spill is any quantity of Otto Fuel II less than one US pint
Salvo alarm
is a warning that a weapon launch is going to occur and personnel should stand clear from the appropriate launch platforms.
Dud
Torpedo is not operational