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Weight Classification Systems

As noted on the Background page, the primary weight data collected on this site falls into one of three main categaries;

  • BSCI (Bureau of Ships Consolidated Index) [older USN and related navies]
  • SWBS/ESWBS (Ship Work Breakdown Structure/Expanded Ship Work Brekdown Structure) [modern USN and related navies]
  • NES (Naval Engineering Standards) [RN and related navies]
All three systems are arranged similarly at their highest level with;
  • Group 1 being the structural weights
  • Group 2 being the main propulsion weights
  • Group 3 being the electrical system weights
  • Group 4 being the "electronics" weights (including Command, Control, Communications, Computers, Intelligence Systems, SONARS and RADARs, etc)
  • Group 5 being the auxiliary systems weights
  • Group 6 being the outfit and furnishings weights
  • Group 7 being the weapon systems weights
In the ESWBS/SWBS systems ship operating loads, such as the weight of the crew, munitions, fuel, and consummables, are included in a "Loads" Group (For a ship's Full Load condition these are called the "F" Loads).  In the NES system, these type operating loads are included the the "Group 8" weights.

In all three systems, these high level weight groups can be broken down to the lower level categories that make up that total weight group. For example,
  • Single digit, two digit, and three digit summaries of these weight categorization methods are summarized below

ESWBS/SWBS

The table below summarizes the single digit, two digit, and three digit weight categories in the ESWBS/SWBS systems.

100   HULL STRUCTURES
110 SHELL + SUPPORTS
111 PLATING
113 INNER BOTTOM
114 SHELL APPENDAGES
115 STANCHIONS
116 LONGIT FRAMING
117 TRANSV FRAMING
120 HULL STRUCTURAL BULKHDS
121 LONGIT STRUCTURAL BULKHDS
122 TRANSV STRUCTURAL BULKHDS
123 TRUNKS + ENCLOSURES
124 BULKHEADS, TORPEDO PROTECT SYS
130 HULL DECKS
131 MAIN DECK
132 2ND DECK
133 3RD DECK
134 4TH DECK
135 5TH DECK+DECKS BELOW
136 01 HULL DECK
137 02 HULL DECK
138 03 HULL DECK
139 04 HULL DECK
140 HULL PLATFORMS/FLATS
141 1ST PLATFORM
142 2ND PLATFORM
143 3RD PLATFORM
144 4TH PLATFORM
145 5TH PLAT+PLATS BELOW
149 FLATS
150 DECK HOUSE STRUCTURE
160 SPECIAL STRUCTURES
161 CASTINGS+FORGINGS+EQUIV WELDMT
162 STACKS AND MACKS
163 SEA CHESTS
164 BALLISTIC PLATING
165 SONAR DOMES
166 SPONSONS
167 HULL STRUCTURAL CLOSURES
168 DKHS STRUCTURAL CLOSURES
169 SPECIAL PURPOSE CLOSURES+STRUCT
170 MASTS+KINGPOSTS+SERV PLATFORM
171 MASTS,TOWERS,TETRAPODS
172 KINGPOSTS AND SUPPORT FRAMES
179 SERVICE PLATFORMS
180 FOUNDATIONS
181 HULL STRUCTURE FOUNDATIONS
182 PROPULSION PLANT FOUNDATIONS
183 ELECTRIC PLANT FOUNDATIONS
184 COMMAND+SURVEILLANCE FDNS
185 AUXILIARY SYSTEMS FOUNDATIONS
186 OUTFIT+FURNISHINGS FOUNDATIONS
187 ARMAMENT FOUNDATIONS
190 SPECIAL PURPOSE SYSTEMS
191 BALLAST+BOUYANCY UNITS
197 WELDING AND RIVETS
198 FREE FLOODING LIQUIDS
200   PROPULSION PLANT
210 ENERGY GEN SYS (NUCLEAR)
212 NUCLEAR STEAM GENERATOR
213 REACTORS
215 REACTOR COOLANT SERVICE SYSTEM
216 REACTOR PLANT AUXILIARY SYSTEMS
230 PROPULSION UNITS
231 STEAM TURBINES
232 STEAM ENGINES
233 DIESEL ENGINES
234 GAS TURBINES
235 ELECTRIC PROPULSION
236 SELF-CONTAINED PROPULSION SYS
237 AUXILIARY PROPULSION DEVICES
240 TRANSMISSION+PROPULSOR SYSTEMS
241 REDUCTION GEARS
242 CLUTCHES + COUPLINGS
243 SHAFTING
244 SHAFT BEARINGS
245 PROPULSORS
246 PROPULSOR SHROUDS AND DUCTS
247 WATER JET PROPULSORS
250 SUPPORT SYSTEMS
251 COMBUSTION AIR SYSTEM
252 PROPULSION CONTROL SYSTEM
253 MAIN STEAM PIPING SYSTEM
254 CONDENSERS AND AIR EJECTORS
255 FEED AND CONDENSATE SYSTEM
256 CIRC + COOL SEA WATER SYSTEM
258 H.P. STEAM DRAIN SYSTEM
259 UPTAKES (INNER CASING)
260 PROPUL SUP SYS- FUEL, LUBE OIL
261 FUEL SERVICE SYSTEM
262 MAIN PROPULSION LUBE OIL SYSTEM
264 LUBE OIL HANDLING
290 SPECIAL PURPOSE SYSTEMS
298 OPERATING FLUIDS
299 REPAIR PARTS + TOOLS
300 ELECTRIC PLANT, GENERAL
310   ELECTRIC POWER GENERATION
311 SHIP SERVICE POWER GENERATION
312 EMERGENCY GENERATORS
313 BATTERIES+SERVICE FACILITIES
314 POWER CONVERSION EQUIPMENT
320   POWER DISTRIBUTION SYS
321 SHIP SERVICE POWER CABLE
322 EMERGENCY POWER CABLE SYS
323 CASUALTY POWER CABLE SYS
324 SWITCHGEAR+PANELS
330   LIGHTING SYSTEM
331 LIGHTING DISTRIBUTION
332 LIGHTING FIXTURES
340   POWER GENERATION SUPPORT SYS
341 SSTG LUBE OIL
342 DIESEL SUPPORT SYS
343 TURBINE SUPPORT SYS
390   SPECIAL PURPOSE SYS
398 ELECTRIC PLANT OP FLUIDS
399 REPAIR PARTS+SPECIAL TOOLS
400 COMMAND+SURVEILLANCE
410   COMMAND+CONTROL SYS
411 DATA DISPLAY GROUP
412 DATA PROCESSING GROUP
413 DIGITAL DATA SWITCHBOARDS
414 INTERFACE EQUIPMENT
415 DIGITAL DATA COMMUNICATIONS
417 COMMAND+CONTROL ANALOG SWBD
420   NAVIGATION SYS
421 NON-ELECT NAVIGATION AIDS
422 ELECTRICAL NAVIGATION AIDS
423 ELECTRONIC NAVIG AIDS, RADIO
424 ELECTRONIC NAVIG AIDS, ACOUSTIC
426 ELECTRICAL NAVIGATION SYS
427 INERTIAL NAVIGATION SYS
428 NAVIGATION CONTROL MONITORING
430   INTERIOR COMMUNICATIONS
431 SWITCHBOARDS FOR I.C. SYSTEMS
432 TELEPHONE SYSTEMS
433 ANNOUNCING SYSTEMS
434 ENTERTAINMENT + TRAINING SYS
435 VOICE TUBES+MESSAGE PASSING SYS
436 ALARM, SAFETY, WARNING SYSTEMS
437 INDICATING, ORDER, METERING SYS
438 INTEGRATED CONTROL SYSTEMS
439 RECORDING + TELEVISION SYSTEMS
440   EXTERIOR COMMUNICATIONS
441 RADIO SYSTEMS
442 UNDERWATER SYSTEMS
443 VISUAL + AUDIBLE SYSTEMS
444 TELEMETRY SYSTEMS
445 TTY + FACSIMILE SYSTEMS
446 SECURITY EQUIPMENT SYSTEMS
450   SURF SURV SYS (RADAR)
451 SURFACE SEARCH RADAR
452 AIR SEARCH RADAR (2D)
453 AIR SEARCH RADAR (3D)
454 AIRCRAFT CONTROL APPROACH RADAR
455 IDENTIFICATION SYSTEMS (IFF)
456 MULTIPLE MODE RADAR
459 SPACE VEHICLE ELECTRONIC TRACKG
460   UNDERWATER SURVEILLANCE SYSTEMS
461 ACTIVE SONAR
462 PASSIVE SONAR
463 MULTIPLE MODE SONAR
464 CLASSIFICATION SONAR
465 BATHYTHERMOGRAPH
466 LAMPS ELECTRONICS
470   COUNTERMEASURES
471 ACTIVE + ACTIVE/PASSIVE ECM
472 PASSIVE ECM
473 TORPEDO DECOYS
474 DECOYS (OTHER)
475 DEGAUSSING
476 MINE COUNTERMEASURES
480   FIRE CONTROL SYS
481 GUN FIRE CONTROL SYSTEMS
482 MISSILE FIRE CONTROL SYSTEMS
483 UNDERWATER FIRE CONTROL SYSTEMS
484 INTEGRATED FIRE CONTROL SYSTEMS
489 WEAPON SYSTEM SWITCHBOARDS
490   SPECIAL PURPOSE SYS
491 ELCTRNC TEST,CHKOUT,MONITR EQPT
492 FLIGHT CNTRL+INSTR LANDING SYS
493 NON-COMBAT DATA PROCESSING SYS
494 METEOROLOGICAL SYSTEMS
495 SPEC PURPOSE INTELLIGENCE SYS
496 CRYPTOLOGIC COMBAT SUPPORT SYS
498 C+S OPERATING FLUIDS
499 REPAIR PARTS+SPECIAL TOOLS
500 AUXILIARY SYSTEMS, GENERAL
510   CLIMATE CONTROL
511 COMPARTMENT HEATING SYSTEM
512 VENTILATION SYSTEM
513 MACHINERY SPACE VENT SYSTEM
514 AIR CONDITIONING SYSTEM
516 REFRIGERATION SYSTEM
517 AUX BOILERS+OTHER HEAT SOURCES
520   SEA WATER SYSTEMS
521 FIREMAIN+SEA WATER FLUSHING SYS
522 SPRINKLING SYSTEM
523 WASHDOWN SYSTEM
524 AUXILIARY SEAWATER SYSTEM
526 SCUPPERS+DECK DRAINS
527 FIREMAIN ACTUATED SERV, OTHER
528 PLUMBING DRAINAGE
529 DRAINAGE+BALLASTING SYSTEM
530   FRESH WATER SYSTEMS
531 DISTILLING PLANT
532 COOLING WATER
533 POTABLE WATER
534 AUX STEAM + DRAINS IN MACH BOX
535 AUX STEAM + DRAINS OUT MACH BOX
536 AUXILIARY FRESH WATER COOLING
540   FUELS/LUBRICANTS,HANDLING+STORAGE
541 SHIP FUEL+COMPENSATING SYSTEM
542 AVIATION+GENERAL PURPOSE FUELS
543 AVIATION+GENERAL PURPOSE LUBO
544 LIQUID CARGO
545 TANK HEATING
549 SPEC FUEL+LUBRICANTS HANDL+STOW
550   AIR,GAS+MISC FLUID SYSTEM
551 COMPRESSED AIR SYSTEMS
552 COMPRESSED GASES
553 O2 N2 SYSTEM
554 LP BLOW
555 FIRE EXTINGUISHING SYSTEMS
556 HYDRAULIC FLUID SYSTEM
557 LIQUID GASES, CARGO
558 SPECIAL PIPING SYSTEMS
560   SHIP CNTL SYS
561 STEERING+DIVING CNTL SYS
562 RUDDER
565 TRIM+HEEL SYSTEMS
568 MANEUVERING SYSTEMS
570   UNDERWAY REPLENISHMENT SYSTEMS
571 REPLENISHMENT-AT-SEA SYSTEMS
572 SHIP STORES+EQUIP HANDLING SYS
573 CARGO HANDLING SYSTEMS
574 VERTICAL REPLENISHMENT SYSTEMS
580   MECHANICAL HANDLING SYSTEMS
581 ANCHOR HANDLING+STOWAGE SYSTEMS
582 MOORING+TOWING SYSTEMS
583 BOATS,HANDLING+STOWAGE SYSTEMS
584 MECH OPER DOOR,GATE,RAMP,TTBL SYS
585 ELEVATING + RETRACTING GEAR
586 AIRCRAFT RECOVERY SUPPORT SYS
587 AIRCRAFT LAUNCH SUPPORT SYSTEM
588 AIRCRAFT HANDLING,SERVICING,STOWAGE
589 MISC MECH HANDLING SYSTEMS
590   SPECIAL PURPOSE SYSTEMS
591 SCIENTIFIC+OCEAN ENGINEERING SYS
592 SWIMMER+DIVER SUPPORT+PROT SYS
593 ENVIRONMENTAL POLLUTION CNTL SYS
594 SUBMARINE RESC+SALVG+SURVIVE SYS
595 TOW,LAUNCH,HANDLE UNDERWATER SYS
596 HANDLING SYS FOR DIVER+SUBMR VEH
597 SALVAGE SUPPORT SYSTEMS
598 AUX SYSTEMS OPERATING FLUIDS
599 AUX SYSTEMS REPAIR PARTS+TOOLS
600 OUTFIT+FURNISHING,GENERAL
610   SHIP FITTINGS
611 HULL FITTINGS
612 RAILS,STANCHIONS+LIFELINES
613 RIGGING+CANVAS
620   HULL COMPARTMENTATION
621 NON-STRUCTURAL BULKHEADS
622 FLOOR PLATES+GRATING
623 LADDERS
624 NON-STRUCTURAL CLOSURES
625 AIRPORTS,FIXED PORTLIGHTS,WINDOWS
630   PRESERVATIVES+COVERINGS
631 PAINTING
632 ZINC COATING
633 CATHODIC PROTECTION
634 DECK COVERINGS
635 HULL INSULATION
636 HULL DAMPING
637 SHEATHING
638 REFRIGERATION SPACES
639 RADIATION SHIELDING
640   LIVING SPACES
641 OFFICER BERTHING+MESSING
642 NON-COMM OFFICER B+M
643 ENLISTED PERSONNEL B+M
644 SANITARY SPACES
645 LEISURE+COMMUNITY SPACES
650   SERVICE SPACES
651 COMMISSARY SPACES
652 MEDICAL SPACES
653 DENTAL SPACES
654 UTILITY SPACES
655 LAUNDRY SPACES
656 TRASH DISPOSAL SPACES
660   WORKING SPACES
661 OFFICES
662 MACH CNTL CENTER FURNISHING
663 ELECT CNTL CENTER FURNISHING
664 DAMAGE CNTL STATIONS
665 WORKSHOPS,LABS,TEST AREAS
670   STOWAGE SPACES
671 LOCKERS+SPECIAL STOWAGE
672 STOREROOMS+ISSUE ROOMS
673 CARGO STOWAGE
690   SPECIAL PURPOSE SYSTEMS
698 OPERATING FLUIDS
699 REPAIR PARTS+SPECIAL TOOLS
700 ARMAMENT
710   GUNS+AMMUNITION
711 GUNS
712 AMMUNITION HANDLING
713 AMMUNITION STOWAGE
720   MISSLES+ROCKETS
721 LAUNCHING DEVICES
722 MISSILE,ROCKET,GUID CAP HANDL SYS
723 MISSILE+ROCKET STOWAGE
724 MISSILE HYDRAULICS
725 MISSILE GAS
726 MISSILE COMPENSATING
727 MISSILE LAUNCHER CONTROL
728 MISSILE HEAT,COOL,TEMP CNTRL
729 MISSILE MONITOR,TEST,ALINEMENT
730   MINES
731 MINE LAUNCHING DEVICES
732 MINE HANDLING
733 MINE STOWAGE
740   DEPTH CHARGES
741 DEPTH CHARGE LAUNCHING DEVICES
742 DEPTH CHARGE HANDLING
743 DEPTH CHARGE STOWAGE
750   TORPEDOES
751 TORPEDO TUBES
752 TORPEDO HANDLING
753 TORPEDO STOWAGE
760   SMALL ARMS+PYROTECHNICS
761 SMALL ARMS+PYRO LAUNCHING DEV
762 SMALL ARMS+PYRO HANDLING
763 SMALL ARMS+PYRO STOWAGE
770   CARGO MUNITIONS
772 CARGO MUNITIONS HANDLING
773 CARGO MUNITIONS STOWAGE
780   AIRCRAFT RELATED WEAPONS
782 AIRCRAFT RELATED WEAPONS HANDL
783 AIRCRAFT RELATED WEAPONS STOW
790   SPECIAL PURPOSE SYSTEMS
791 SPECIAL WEAPONS
792 SPECIAL WEAPONS HANDLING
793 SPECIAL WEAPONS STOWAGE
797 MISC ORDINANCE SPACES
798 ARMAMENT OPERATING FLUIDS
799 ARMAMENT REPAIR PART+TOOLS
F00 LOADS
F10   SHIPS FORCE
F11 OFFICERS
F12 NON-COMMISSIONED OFFICERS
F13 ENLISTED MEN
F14 MARINES
F15 TROOPS
F16 AIR WING PERSONNEL
F19 OTHER PERSONNEL
F20   MISSION RELATED EXPENDABLES+SYS
F21 SHIP AMMUNITION
F22 ORD DEL SYS AMMO
F23 ORD DEL SYS (AIRCRAFT)
F24 ORD REPAIR PARTS (SHIP)
F25 ORD REPAIR PARTS (ORD)
F26 ORD DEL SYS SUPPORT EQUIP
F29 SPECIAL MISSION RELATED SYS
F30   STORES
F31 PROVISIONS+PERSONNEL STORES
F32 GENERAL STORES
F33 MARINES STORES (SHIPS COMPLEM)
F39 SPECIAL STORES
F40   LIQUIDS, PETROLEUM BASED
F41 DIESEL FUEL MARINE
F42 JP-5
F43 GASOLINE
F44 DISTILLATE FUEL
F45 NAVY STANDARD FUEL OIL (NSFO)
F46 LUBRICATING OIL
F49 SPECIAL FUELS AND LUBRICANTS
F50   LIQUIDS, NON-PETRO BASED
F51 SEA WATER
F52 FRESH WATER
F53 RESERVE FEED WATER
F54 HYDRAULIC FLUID
F55 SANITARY TANK LIQUID
F56 GAS (NON FUEL TYPE)
F59 MISC LIQUIDS, NON-PETROLEUM
F60   CARGO
F61 CARGO, ORDINANCE + DELIVERY SYS
F62 CARGO, STORES
F63 CARGO, FUELS + LUBRICANTS
F64 CARGO, LIQUIDS, NON-PETROLEUM
F65 CARGO, CRYOGENIC+LIQUEFIED GAS
F66 CARGO, AMPHIBIOUS ASSAULT SYS
F67 CARGO, GASES
F69 CARGO, MISCELLANEOUS

BSCI

The table below summarizes the
the single digit, two digit, and three digit weight categories in the BSCI system.  Further details of this weight classification system can be found in at this link on Google Books

Group 1 - Hull Structure 1 
100 Shell Plating and Planking
101 Longitudinal and Transverse Framing
102 Inner Bottom
103 Platforms and Flats Below Lowermost Continuous Deck
104 Fourth and Lower Continuous Decks
105 Third Deck
106 Second Deck
107 Main Deck or Hangar Deck
108 Forecastle and Poop Decks
109 Gallery Deck
110 Flight Deck, Landing Platforms, and Special Purpose Decks above Weather Deck
111 Superstructure
112 Foundations for Propulsion Plant Machinery
113 Foundation for Auxiliaries and other Equipment
114 Structural Bulkheads
115 Trunks and Enclosures
116 Structural Sponsons
117 Armor
118 Aircraft Fuel Saddle Tank Structure
119 Structural Castings, Forgings and Equivalent Weldments
120 Sea Chests
121 Ballast and Buoyancy Units, Fixed or Fluid
122 Doors and Closures, Special Purpose
123 Doors, Hatches, Manholes, and Scuttles  Nonballistic
124 Doors, Hatches, Manholes, and Scuttles  Ballistic
125 Kingposts and Support Frames
126 Compartment Testing ( no weight )
127 Sonar Dome
128 Masts , Towers , Tetrapods , and Service Platforms
150 Welding , Riveting , and Fastenings
151 Free Flooding Liquids
Group 2 - Propulsion 
200 Boilers and Energy Converters ( Non Nuclear ) 
201 Propulsion Units
202 Main Condensers and Air Ejectors
203 Shafting , Bearings , and Propellers
204 Combustion Air Supply System
205 Uptakes ( Smoke Pipes )
206 Propulsion Control Equipment ( Non  Nuclear )
207 Main Steam System
208 Feedwater and Condensate System
209 Circulating and Cooling Water Systems
210 Fuel Oil Service System
211 Lubricating Oil System
212 Nuclear Steam Generators
213 Reactors
214 Reactor Coolant System
215 Reactor Coolant Service Systems
216 Reactor Plant Auxiliary Systems
217 Nuclear Power Control and Instrumentation
218 Radiation Shielding ( Primary )
219 Radiation Shielding ( Secondary )
250 Propulsion Repair Parts 
251 Propulsion Operating Fluids
Group 3 - Electric Plant 
300 Electric Power Generation
301 Power Distribution Switchboards
302 Power Distribution System ( Cable )
303 Lighting System - ( Distribution and Fixtures )
350 Electric Plant Repair Parts
351 Electric Power Generator Fluids
Group 4 - Communication and Control 
400 Navigation Equipment ( Non Electronic )
401 Interior Communication Systems and Equipment
402 Gun Fire Control System
403 Countermeasure Systems ( Non Electronic )
404 Electronic Countermeasure Systems ( ECM)
405 Missile Fire Control Systems
406 ASW Fire Control and Torpedo Fire Control Systems ( Surface Ships )
407 Torpedo Fire Control System ( Submarines )
408 Radar Systems
409 Radio Communication Systems
410 Electronic Navigation Systems
411 Space Vehicle Electronic Tracking Systems
412 Sonar Systems
413 Electronic Tactical Data System
450 Communication and Control Repair Parts
451 Communication and Control Operating Fluids
Group 5 - Auxiliary Systems 
500 Heating System
501 Ventilation System
502 Air Conditioning System
503 Refrigerating Spaces, Plant, and Equipment
504 Gasoline, HEAF, All Liquid Cargo Piping, Oxygen- Nitrogen, and Aviation Lubricating Oil Systems
505 Plumbing Installations
506 Firemain, Flushing, Sprinkler, Washdown, and Salt Water Service Systems
507 Fire Extinguishing Systems
508 Drainage, Ballast, Trimming, Heeling, and Stabilizer Tank System
509 Fresh Water System
510 Scuppers and Deck Drains
511 Fuel and Diesel Oil Filling, Venting, Stowage, and Transfer Systems
512 Tank Heating Systems
513 Compressed Air System
514 Auxiliary Steam, Exhaust Steam, and Steam Drains
515 Buoyancy Control System ( Flooding and Venting for Submarines)
516 Miscellaneous Piping Systems
517 Distilling Plant
518 Steering Systems
519 Rudders
520 Mooring, Towing, Anchor and Aircraft Handling Systems and Deck Machinery
521 Elevators, Moving Stairways, Stores Strikedown, and Stores Handling Equipment
522 Operating Gear for Retracting and Elevating Units
523 Aircraft Elevators
524 Aircraft Arresting Gear, Barriers, and Barricades
525 Catapults and Jet Blast Deflectors
526 Hydrofoils
527 Diving Planes and Stabilizing Fins
528 Replenishment at Sea and Cargo Handling
550 Auxiliary Systems Repair Parts
551 Auxiliary Systems Operating Fluids, Gases, and Stabilizer Fluids
Group 6 - Outfit and Furnishings 
600 Hull Fittings
601 Boats, Boat Stowage , and Handling
602 Rigging and Canvas
603 Ladders and Gratings
604 Nonstructural Bulkheads and Nonstructural Doors
605 Painting
606 Deck Covering
607 Hull Insulation
608 Storerooms, Stowages and Lockers
609 Equipment for Utility Spaces
610 Equipment for Workshops , Laboratories and Test Areas
611 Equipment for Galley, Pantry, Scullery, and Commissary Outfit
612 Furnishings for Living Spaces
613 Furnishings for Offices , Control Centers, and Machinery Spaces
614 Furnishings for Medical , Dental , and Pharmaceutical Spaces
615 Radiation Shielding for Nuclear Support Facilities
650 Outfit and Furnishings Repair Parts
651 Outfit and Furnishings Operating Fluids
Group 7 - Armament 
700 Guns cnd Gun Mounts
701 Ammunition Handling Systems
702 Ammunition Stowage
703 Special Weapons, Handling and Stowage
704 Rocket and Missile Launching Devices ( Surface to Air, Surface to Surface, and SubSurface)
705 Rocket and Missile Launching Devices ( AntiSubmarine Warfare)
706 Rocket, Missile, and Components Handling Systems
707 Rocket, Missile, and Components Stowage
708 Torpedo Tubes
709 Torpedo Handling and Stowage
710 Mine Handling Systems and Stowage
711 Small Arms and Pyrotechnic Stowage
712 Air Launched Weapons Handling Systems
713 Air Launched Weapons Stowage
720 Cargo Munition Stowage
750 Armament Repair Parts
751 Armament Operating Fluids


NES

The table below summarizes the the single digit, two digit, and three digit weight categories in the NES system.  Further details of this weight classification system can be found in DEF STAN 02-163 Issue 2.

GROUP 1 - Hull and Superstructure 
10 Hull Structure
100 Hull Plating
101 Hull Longitudinal and Transverse Framing
102 Inner Bottom Plating
103 Hull Structural Walkways/Sponsons
104 Metallic Hull Armour and Protection
105 Sonar Domes Forming Part of the Hull Structure
106 Radar Absorbent Material
107 Non-Metallic Hull-Armour and Protection
11 Superstructure
110 Superstructure Plating
111 Superstructure Longitudinal and Transverse Framing
112 Superstructure Decks and Flats
113 Superstructure Bulkheads
114 Superstructure Hangar
115 Superstructure Structural Walkways and Sponsons
116 Metallic Superstructure Armour and Protection
117 Non-Metallic Superstructure and Armour
118 Ramps to Assist Aircraft Take-Off
119 Radar Absorbent Material
12 Structural Bulkheads
120 Main Transverse Bulkheads
121 Main Longitudinal Bulkheads
122 Other Bulkheads
123 Funnel, Structural Trunks and Enclosures
124 Metallic Bulkhead Armour and Protection
125 Non-Metallic Bulkhead Armour and Protection
13 Structural Decks
130 Main Decks
131 Minor Decks and Flats
132 Metallic Deck Armour and Protection
133 Non-Metallic Deck Armour and Protection
14 Doors, Hatches and Scuttles
140 Bridge Windows, Sidelights and Scuttles
141 Watertight and Gastight Doors and Hatches
142 Escape Hatches and Scuttles
143 Manholes
144 Blow-Off plates
145 Bow, Side and Stern Doors Including Associated Ramps
15 Seats, Supports and Masts
150 Unallocated
151 Seats and Supports for Group 1 Items
152 Seats and Supports for Group 2 Items
153 Seats and Supports for Group 3 Items
154 Seats and Supports for Group 4 Items, and Masts
155 Seats and Supports for Group 5 Items
156 Seats and Supports for Group 6 Items
157 Seats and Supports for Group 7 Items
158 Seats and Supports for Group 8 Items
16 Control Surfaces
160 Rudders and Skegs
161 Stabilisers (Fixed)
162 Unallocated
163 Hydrofoils
164 Bilge Keels
165 Stabilising Tanks
17 Structural Castings and Forgings
170 Shaft Brackets
171 Forgings and Castings
172 Sea Chests
173 Anchor Hawse Pipes and Navel Pipes
174 Stern Tubes
175 Sea Tubes
18 Buoyancy and Ballast Units
180 Buoyancy Units
181 Ballast Units
19 Fastenings 
190 Welding
191 Riveting
192 Bolting
193 Bonding
GROUP 2 - Propulsion 
20 Propulsion Power Plant (Nuclear)
200 Reactor
201 Steam Generators
202 Primary Circuit System
203 Primary Circuit Service System
204 Reactor Plant Auxiliary Systems
205 Reactor plant Control and Instrumentation
206 Primary Shielding
207 Secondary Shielding
21 Propulsion Power Plant (Non-Nuclear)
210 Main Boilers
211 Main Boiler Systems Control and Instrumentation
212 Main Electrical Storage Batteries
213 Main Electrical Storage Battery System, Switchgear and Instrumentation
214 Gas Generators (if Separate from Power Turbine)
215 Gas Generator Systems, Control and Instrumentation
22 Propulsion Units and Control Equipment
220 Steam Turbines
221 Gas Turbines
222 Propulsion Diesel Engines
223 Electric Propulsion Drives
224 Propulsion Unit Control Equipment
225 Clutches, Gearing, Flexible Couplings and Turning Gear
226 Machinery Space Lifting Gear
227 Insulation
23 Main Condensers and Air Ejectors
230 Main Condensers
231 Air Ejectors
232 Insulation, Lagging and Liners
24 Shafting, Bearings and Propulsors
240 Shafting
241 Propulsors Including Thrusters and Activated Rudders
242 Shaft Bearings, Bulkhead Glands, Seals, Etc.
243 Torsionmeters and Brakes
25 Combustion Air Supply and Exhaust Systems
250 Supply Fans or Blowers
251 Supply System
252 Exhaust System
26 Steam Systems
260 Main Superheated Steam System
261 Auxiliary Superheated Steam System
262 Saturated Steam System
263 Steam Exhaust System
264 Steam Drain System
27 Circulating and Cooling Water Systems, Feed Water and Condensate Systems
270 Main Circulating Water System to Condensers
271 Cooling Water System for Propulsion Units
272 Feed Water System for Propulsion Units
273 Condensate System for Propulsion Units
28 Fuel Oil Service Systems
280 Combustion Fuel Oil Service to Propulsion Units
29 Lubricating Oil Systems
290 Lubricating Oil System to Propulsion Units
GROUP 3 - Electrical 
30 Electrical Main Supply Power Generation
300 Steam Turbine Generator Sets
301 Gas Turbine Generator Sets
302 Diesel Generator Sets
303 Shaft Generators
304 Fuel Cell Generators
305 Ride Through Power Supply
306 Renewable Technology
31 Power Distribution Equipment
310 Main Supply Equipment
311 Distribution Equipment
312 General Service Conversion Equipment
313 Power Distribution Equipment for Portable Apparatus
32 Power Distribution Cabling
320 Cabling
321 Glands and Cable Support Equipment
33 Lighting Systems
330 General Lighting Systems
331 Emergency Lighting System
332 Ceremonial Lighting System
333 Contingency Lighting System
GROUP 4 - Control and Communication 
40 Navigation Systems
400 Gyro and Other Compasses
401 Ship Inertial Navigation System (SINS)
402 Navigation Aids and Direction Finding Equipment
403 Log
404 Meteorology and Oceanographic Systems
405 Navigation Radar
406 Viewing Devices
407 Chronometers
408 Plotting and Chart Tables
409 Navigation Lights, Etc.
41 Internal Communications
410 Broadcasts
411 Internal Telephone Network and Telephones
412 Sound Reproduction Equipment (SRE)
413 Voice and Pneumatic Tubes
414 Television, Radio and Cinema Equipment
415 Alarms and Warnings
416 Chemical, Biological, Radiological and Nuclear (CBRN) Warning Systems
417 Engine Telegraph and Propeller Orders
418 Rudder Angle Indicators
419 Information Systems
42 Ship and Main Machinery Control Systems
420 Ship Control Console (SCC)
421 Systems Consoles
422 Command Console
423 Rudder Control System
424 Integrated Navigation Systems
425 Moveable Stabilisers and Control System
426 Hydrofoil Control System
427 Tank Stabilisation Systems (Active and Passive)
428 Machinery Control System
429 Integrated Platform Management Systems
43 Weapon Control Systems
430 Surface/Air Weapon Control Systems
431 Surface/Surface Weapon Control Systems
432 Surface/Anti-Submarine Weapon Control Systems
433 Submerged Launched (Non-Air Flight) Systems
434 Submerged Launched (Air Flight) Systems
435 Weapon and Surveillance Radars
436 Sonars
437 Centralised Weapon Control Systems
438 Electronic Warfare Systems (EW)
439 Control Systems for Autonomous Craft
44 Ship’s Protective Systems
440 Degaussing System
441 Cathodic Protection System
442 Sacrificial Anodes
45 External Communication Systems
450 Radio Communication Systems
451 Underwater Telephones and Echo Sounders
452 Visual Signalling Equipment
453 Audio Signalling Equipment
454 Satellite Communication Systems
GROUP 5 - Ancillary Systems 
50 Air Conditioning, Ventilation, Refrigeration - Systems and Equipment
500 Air Conditioning Plants
501 Chilled and Tepid Water Systems
502 Air Conditioning and Mechanical Ventilation System
503 Free Standing Air Conditioning Units and Electrical Space Heaters
504 Natural Ventilation Systems
505 Refrigeration Plant and Equipment
506 Unallocated
507 Unallocated
508 Air Conditioning and Ventilation System in Main Machinery Spaces
509 Smoke Clearance Ventilation
51 Fuel Systems (Excluding Aircraft Systems)
510 Main Fuel Filling, Heating and Transfer Systems
511 Auxiliary Fuel Systems
512 Tank Cleaning Systems
52 Sea and Fresh Water Systems
520 Sea Water System (Including HPSW)
521 Sea Water Fire Fighting System
522 Flooding and Spraying Systems
523 Pre-Wetting System
524 Ballasting, Trimming and Drainage Systems
525 Sea Water/Fresh Water Cooling System
526 Distilling Plant System
527 Fresh Water System
528 Fresh Water Spraying systems
53 Air and Gas Systems
530 HP Air System
531 LP Air System
532 Breathing Air Systems
533 Control Air Systems
534 Salvage Air Systems
535 Recompression Chamber
536 Special Services Air Systems
537 Gas Fire Extinguishing Systems
54 Hydraulic Systems (Excluding Aircraft Systems)
540 Hydraulic Systems
55 Aircraft Systems
550 Unallocated
551 Aircraft Handling Systems
552 Aircraft Lifts
553 Arresting Gear and Barriers
554 Catapults and Jet Blast Deflectors
555 Aircraft Gas Producing Systems
556 Aircraft Liquid Systems
557 Unallocated
558 Aircraft Electrical Systems
56 Waste Disposal Systems
560 Sewage Disposal Systems
561 Waste Water Disposal System
562 Garbage Disposal System
563 Oil Slick Dispersal System
57 Auxiliary Steam, Exhaust Steam and Steam Drain Systems
570 Auxiliary Steam Generators and Systems
571 Exhaust Steam Systems
58 Lubricating Oil Systems
580 Main Lubricating Oil Filling and Transfer System
581 Auxiliary Lubricating Oil Systems
GROUP 6 - Outfit and Furnishing 
60 General Fittings
600 Anchors, Cables, Winches, Bollards, Fairleads, Cleats, Etc.
601 Guard-Rails, Stanchions, Rigging, Awnings, Etc.
602 Ladders and Fittings
603 Non-Structural Walkways
604 Miscellaneous Fittings
61 Boats and Lifesaving Equipment
610 Powered and Non-Powered Boats
611 Davits and Handling Equipment for Boats
612 Liferafts, Lifejackets, Stowages, Floats, Etc.
62 Minor Bulkheads, Partitions, Deck and Bulkhead Coverings in the Main Hull
620 Minor Bulkheads and Doors
621 Partitions and Linings
622 External and Internal Paint
623 Deck Coverings
624 Deck Treads and Tread Plates
625 Acoustic Insulation
626 Thermal, Thermal/Acoustic Insulation
627 Deck, Bulkhead and Hull Damping
628 Modular Accommodation
63 Furnishings and Fittings in Storerooms and Stowages
630 Furnishings and Fittings in Named General Stores
631 Furnishings and Fittings in Victualling Stores (Including Medical and NAAFI Canteen Stores)
632 Spare Gear Stowages throughout the Ship
633 Furnishings and Fittings in All Other Stores
64 Furnishings for Living Spaces
640 Furnishings for Officers’ Accommodation
641 Furnishings for Crew’s Accommodation
642 Furnishings for Heads and Bathrooms
643 Furnishings for Aviation Crew Accommodation
644 Furnishings for Embarked Forces/Trainees Accommodation
65 Furnishings for Offices, Medical Spaces, Etc.
650 Furnishings for Offices (Excluding Air Offices - 657)
651 Furnishings for Sick Bay and Dental Surgeries
652 Furnishings for Operating Theatres
653 First Aid Equipment throughout the Ship
654 Furnishings for Health Physics Laboratory
655 Furnishings for Operational Rooms and Spaces
656 Furnishings for Amenity Spaces
657 Furnishings for Air Offices
658 Furnishings for Lobbies and Passageways
66 Equipment for Galleys, Laundries and Workshops
660 Equipment for Galleys, Pantries and Other Food Preparation Spaces
661 Water Coolers, Domestic Refrigerators, Ice Cream Machines, Etc.
662 Equipment for Laundry and Drying Rooms
663 Equipment for Workshops and Repair Spaces
664 Equipment for Air Workshops and Repair Spaces
67 Minor Bulkheads Partitions Deck and Bulkhead Coverings in the Superstructure
670 Minor Bulkheads and Doors
671 Partitions and Linings
672 External and Internal Paint
673 Deck Coverings
674 Deck Treads and Tread Plates
675 Acoustic Insulation
676 Thermal, Thermal/Acoustic Insulation
677 Unallocated
678 Modular Accommodation
68 Portable Firefighting, Damage Control, CBRN, and Escape Equipment
680 Portable Fire Fighting Equipment
681 Damage Control Equipment
682 CBRN Equipment
683 Escape Equipment
69 Load Handling and RAS Equipment
690 RAS Mast Highpoints and Tripods
691 Stores Handling and RAS Strike Down Equipment
692 Cranes, Lifts and Other Non-Portable Lifting Appliances
693 Portable Lifting Equipment
GROUP 7 - Armament 
70 Surface/Air Missile Armament
700 Mountings and Launchers
701 Missile Handling Systems
702 Missile Stowages
71 Surface/Surface Missiles Armament
710 Mountings and Launchers
711 Missile Handling System
712 Missile Stowages
72 Anti-Submarine Armament
720 Mountings and Launchers
721 Ammunition and Missile Handling Systems
722 Weapon Stowages
73 Submerged Launched (Non-Air Flight) Armament
730 Mountings and Launchers
731 Weapon Handling System
732 Weapon Stowages
74 Submerged Launched (Air Flight) Armament
740 Mountings and Launchers
741 Weapon Handling System
742 Weapon Stowages
75 Air Launched Armament
750 Weapon Handling Systems
751 Weapon Stowages
76 Minehunting, Minelaying and Minesweeping Equipment
760 Minehunting Equipment
761 Minelaying Equipment
762 Minesweeping Equipment
77 Rocket Launchers, Small Arms and Pyrotechnics Stowages and Launchers
770 Rocket Flare and Decoy Launchers
771 Small Arms Stowages
772 Pyrotechnics Stowages
78 Gun Armament
780 Mountings
781 Ammunition Handling Systems
782 Ammunition Stowages
79 Unmanned Aerial, Surface and Submersible Vehicles (UXVs) Support Systems
790 Unmanned Aerial, Surface and Submersible Vehicles (UXVs) Support Systems
GROUP 8 - Variable Load
80 Crew, Embarked Personnel, Aircrew and Effects
800 Crew and Effects
801 Embarked Forces Personnel
802 Flight and Air Group Personnel
81 Ammunitions
810 Surface/Air Weapons
811 Surface/Surface Weapons
812 Anti-Submarine Weapons
813 Submerged Launched (Non-Air Flight) Weapons
814 Submerged Launched (Air Flight) Weapons
815 Air Launched Weapons
816 Mines and Mine Disposal Weapons
817 Rockets, Flares, Pyrotechnics and Small Arms Ammunition (Excluding air)
818 Embarked Forces Fuel and Ammunitions
819 Ammunition for Unmanned Vehicles
82 Aerial, Surface and Submersible Vehicles
820 Manned Fixed Wing
821 Manned Rotary Wing
822 Unmanned Aerial Vehicles (UAVs)
823 Unmanned Surface Vehicles (USVs)
824 Unmanned Underwater Vehicles (UUVs)
83 Embarked Military Force (EMF) Vehicles
830 Armoured Fighting Vehicles
831 Military Transport
832 Staff Cars, Land Rovers, Etc.
833 EMF Craft
834 Swimmer Delivery Vehicles (SDVs)/Manned Submersibles
84 Victualling, Accommodation and Medical Stores
840 Dry Provisions
841 Mess and Galley Gear
842 Loan Clothing
843 NAAFI/Canteen Stores
844 Refrigerated Stores
845 Bedding
846 Medical Stores
847 Cash Clothing
848 CO’s, Wardroom, Trophies and Sports Gear Stores
849 Stored Garbage
85 General Stores and Marine Engineering Spares
850 General Stores
851 Marine Engineering Spares (MES)
852 Stationery, Books and Office Equipment
853 Oils and Greases
854 Flammables, Acids, Paints and Gases
855 Rigging Warrant Items
86 Weapon Stores
860 Air Stores
861 Embarked Forces Stores
862 Weapon Equipment Stores
863 Weapon Equipment Spares
864 Non-Explosive (Gun Wharf) Stores
87 Operating Fluids
870 Unallocated
871 No longer used (previously Operating Fluids for Group 1 (Free Flooding Liquids)
871 Operating Fluids for Group 2
872 Operating Fluids for Group 3
873 Operating Fluids for Group 4
874 Operating Fluids for Group 5
875 Operating Fluids for Group 6
876 Operating Fluids for Group 7
88 Stowed Liquids
880 Liquids in Fresh Water Tanks
881 Liquids in Sea Water Tanks
882 Liquids in Fuel Oil Tanks
883 Liquids in Reserve and Main Feed Water Tanks
884 Liquids in Lubricating Oil Tanks
885 Liquids in Hydraulic Oil Tanks
886 Liquids in Pure Water Tanks (Nuclear, Battery) and Detergent Tanks
887 Liquids in Sanitary Tanks
888 Liquids in Aviation Fuel Tanks
889 Liquids in Aviation Lubricating Oil Tanks
89 Cargo
890 Solid Cargo
891 Liquid Cargo
892 Passengers and Effects

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