[Code of Federal Regulations]
[Title 46, Volume 7]
[Revised as of October 1, 2004]
From the U.S. Government Printing Office via GPO Access
[CITE: 46CFR174.360]

[Page 182-190]
 
                           TITLE 46--SHIPPING
 
   CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED)
 
PART 174_SPECIAL RULES PERTAINING TO SPECIFIC VESSEL TYPES--Table of 
Contents
 
          Subpart J_Special Rules Pertaining to Dry Cargo Ships
 
Sec. 174.360  Calculations.

    Each ship to which this subpart applies, must meet the minimum 
standard of subdivision and damage stability required for that ship by 
the International Convention for the Safety of Life at Sea, 1974, as 
amended, chapter II-1, part B-1. Compliance with the applicable 
requirements must be demonstrated by calculations and reflected in 
information on loading restrictions, such as a maximum height of the 
center of gravity (KG) or minimum metacentric height (GM) curve that is 
part of the stability information required by Sec. 170.110 of this 
chapter and Regulation 25-8 of The International Convention for the 
Safety of Life at Sea, 1974, as amended, chapter II-1, part B-1.

[[Page 183]]

                                  INDEX

                   SUBCHAPTER S_SUBDIVISION AND STABILITY

  Editorial Note: This listing is provided for informational purposes 
only. It is compiled and kept current by the U.S. Coast Guard, 
Department of Homeland Security. This index is updated as of October 1, 
2003.

                                               Part, Subpart, or Section

                                 A

Addresses:
Material incorporated by reference...............................170.015
Merchant marine technical offices................................170.100
Aft peak bulkhead, passenger vessels.............................171.090
Alterations..........................................170.001(b), 170.005
Auxiliary sailing vessels:
Defined.......................................................170.055(a)
Large passenger vessels..........................................171.045
Small passenger vessels.................................170.055, 171.010
Weather criterion for............................................170.160

                                 B

Ballast, fixed. (See Fixed ballast)
Barges:
Deck cargo...........................................Part 174, Subpart B
Definitions..........................................170.055 (b) and (q)
Large passenger..................................................171.045
Oceanographic research...........................................173.070
Tank. (See Tank barges)
Weather criterion for............................................170.160
Bulk cargo vessels, special requirements for....................Part 172
Buoyancy:
Air tanks.........................................171.070(d), 171.095(c)
Foam flotation material..........................................170.245
Internal..........................................171.070(d), 171.095(c)
Standards of flooding............................................171.017

                                 C

Calculations:
Samples of, in stability booklet..............................170.110(d)
Stability text results........................................170.175(a)
Submittal of.....................................................170.090
Catamarans.......................................................171.057
Center of gravity:
Determination of.....................................Part 170, Subpart F
Estimated position on tank vessels...............................170.200
In stability booklet..........................................170.110(d)
Subchapter O barges...........................................172.090(b)
Tanks......................................................170.075(a)(5)

[[Page 184]]

Virtual increase of..................................Part 170, Subpart I
Collision bulkhead:
Oceanographic research vessels..........................173.075, 173.085
Passenger vessels.....................171.060, 171.065, 171.070, 171.085
Consumable liquids: Effect on stability calculations....170.285, 170.290
Cranes:
Data required....................................................170.095
Requirements for vessels with........................Part 173, Subpart B
Cross curves, required.....................................170.090(b)(3)
Cross-flooding:
Liquefied gas carriers, system standards......................172.195(g)
Passenger vessels, system standards...........................171.080(e)
Subchapter O tankships, system standards......................172.150(g)

                                 D

Damage stability calculations:
Liquefied gas carriers, local damage.............................172.205
Liquefied gas carriers, major damage.............................172.170
MODU's, standards for............................................174.065
Nautical school ships, standards for....................173.055, 173.080
Oceanographic research vessels, standards for....................173.080
Passenger vessels:
Cockpits...................................................171.145(e)(3)
Types I and II...................................................171.080
Type III.........................................................171.082
Well decks.................................................171.150(b)(2)
Subchapter D tank barges carrying cargoes other than oil.........172.050
Subchapter O barges, standards for...............................172.103
Subchapter O tankships, standards for............................172.133
Dangerous cargoes.............................Part 172, Subparts E and F
Dead covers:
Oceanographic research vessels, required......................173.085(k)
Passenger vessels, required...........171.117, 171.119(a)(2), 171.122(g)
Deadweight surveys............................................170.175(c)
Deck cargo barges. (See Barges)
Definitions:
Concerning a vessel..............................................170.055
General terms....................................................170.050
Pertaining to lifting............................................173.010
Pertaining to liquefied gas carriers.............................172.160
Pertaining to MODU's.............................................174.035
Pertaining to passenger vessels..................................171.010
Pertaining to Subchapter O tankships.............................172.127
Discontinuous bulkhead deck, passenger vessels................171.015(c)
Discontinuous weather deck....................................170.170(b)
Double bottoms, passenger vessels:
Manholes in......................................................171.108
Permeability of............................................171.066(b)(4)
Required.........................................................171.105
Watertight floors in.............................................171.109
Wells in.........................................................171.106
Downflooding:
Angle.........................................................170.055(g)
Deck cargo barges................................................174.015
Defined (except MODU's).......................................170.055(e)
Lifting vessels...............................................173.020(b)
Liquefied gas carriers...........................................172.195
Mobile offshore drilling units (MODU's):

[[Page 185]]

Considered.......................................................174.045
Defined.......................................................174.035(b)
Oil tankers...................................................170.055(p)
Sailing passenger vessels........................................171.055
Subchapter O barges..............................................172.090
Subchapter O tankships...........................................172.150
Tugboats and towboats............................................174.145
Vessels of unusual proportion and form...........................170.173
Vessels which tow................................................173.095
Draft marks....................................170.075(a)(6), 170.180(e)
Drainage of weather decks............................Part 171, Subpart H
Deck cargo barges....................................Part 174, Subpart B

                                 E

Equalization. (See Cross-flooding)
Equivalent plane bulkhead, passenger vessels:
Defined.......................................................171.010(c)
Required:
Type I subdivision............................................171.067(f)
Type II subdivision...........................................171.073(c)
Equivalents......................................................170.010
Estimated lightweight vertical center of gravity.................170.200
Existing vessels..............................................170.001(b)

                                 F

Ferry:
Collision bulkheads...........................................171.060(d)
Defined.......................................................171.010(d)
Fixed ballast....................................170.110(d)(14), 170.235
Floodable length:
Curves required............................................170.090(b)(4)
Defined.......................................................171.010(f)
Passenger vessels:
Standards, Type I................................................171.065
Standards, Type II...............................................171.070
Standards, Type III..............................................171.075
Floors, watertight--in double bottoms............................171.109
Foam flotation...........................170.245, 171.070(d), 171.095(c)
Foreign vessels............................................170.001(a)(2)
Freeboard: Allowable heeling limits, general..................170.170(a)
Freeing ports:
Minimum Area.....................................................171.150
Required.........................................................171.135
Free surface:
Instructions concerning:
Counterballasting..........................................170.125(b)(1)
Stability booklet..........................................170.110(d)(6)
Subchapter O tank barges, assumption..........................172.087(b)
Treatment of, general................................Part 170, Subpart I

                                 G

Grain in bulk........................................Part 172, Subpart B
``Grandfathering''............................................170.001(b)

[[Page 186]]

                                 H

Hazardous liquids................................Part 172, Subparts E, F
Hopper barges:
Subchapter D cargoes other than oil..............................172.050
Subchapter O cargoes....................................172.100, 172.110
Hydrostatic curves (curves of form), required..............170.075(a)(3)

                                 I

Inclining experiments. (See Stability test)
Incorporation by reference:
General..........................................................170.015
IMO Resolution A.265(VIII).....................170.135, 171.075, 171.082
MIL-P-21929B...............................................170.245(b)(9)
Intact stability:
Deck cargo barges.......................................174.015, 174.020
Large passenger vessels:
Catamarans.......................................................171.057
Passenger heel...................................................171.050
Sailing..........................................................171.055
Lifting vessels.........................................173.020, 173.025
Liquefied gas carriers...........................................172.165
Mobile offshore drilling units (MODU's)..........................174.045
Passenger vessels:
Cockpits...................................................171.145(e)(1)
Well decks.................................................171.150(b)(2)
Subchapter O barges.....................................172.090, 172.095
Tugboats and Towboats............................................174.145
Vessels of unusual proportion and form...............170.170(d), 170.173
Weather Criterion.......................................170.160, 170.170
International voyage:
Passenger vessels:
Aft peak bulkhead required....................................171.090(a)
Defined.......................................................171.010(h)
Double bottoms required for...................................171.105(a)
Shaft tunnels.................................................171.100(a)
Special considerations...........................................171.068
Standards........................................................171.045
Subdivision requirements...................................170.265(d)(1)
Watertight door requirements...............................170.265(d)(1)

                                 L

Large Passenger vessels..............................Part 171, Subpart C
Lifting:
Data submittal requirements......................................170.095
Operating information requirements...............................170.125
Standards............................................Part 173, Subpart B
Lightweight:
Defined.......................................................170.055(j)
Information required, stability booklet....................170.110(d)(1)
Determination of.....................................Part 170, Subpart F
Lines drawing required.........................170.075(a)(2), 170.180(a)
Liquefied flammable gas, barges......................Part 172, Subpart C
Liquefied gas carriers...............................Part 172, Subpart G
LNG Carriers. (See Liquefied gas carriers)
Load line:
Certificate stability information on..............170.110(e), 170.120(b)

[[Page 187]]

Length, defined............................................170.055(h)(5)
Locks required:
Cargo space watertight doors..................................170.275(b)
Port lights below the bulkhead deck........................171.116(f)(4)

                                 M

Machinery space bulkhead, passenger vessels......................171.095
Main transverse watertight bulkhead...........................170.055(k)
Manholes, passenger vessels:
Double bottoms...................................................171.108
Prohibited locations..........................................171.111(h)
Margin line:
Passenger vessels:
Air tankage or internal buoyancy...........................171.070(d)(2)
Dead covers required on port lights, below....................171.117(a)
Location of......................................................171.015
Location of openings.....................................171.111(f), (g)
Openings in trunks.........................................171.113(c)(2)
Stepped bulkheads..........................................171.067(b)(3)
Submergence of........................171.017, 171.080(d)(3), 171.100(b)
Volume below.........................Tables 171.065(a), 171.066, 171.068
Volume of passenger spaces above..............................171.065(b)
Watertight integrity above...........................Part 171, Subpart G
Test head:
Form flotation material....................................170.245(b)(3)
Watertight doors..............................................170.270(b)
Military specifications, MIL-P-21929B.............170.015(b), 170.245(b)
Mobile offshore drilling units (MODU's):
Stability information required................................170.110(a)
Standards for............................174.005(b), Part 174, Subpart C

                                 N

Nautical school ships, standards.......171.001(b), 173.001(b), Part 173, 
                                                               Subpart C

                                 O

Oceanographic vessel, standards........171.001(b), 173.001(c), Part 173, 
                                                               Subpart D
Oil in bulk, standards for vessels carrying........172.005(c), Part 172, 
                                                               Subpart D
Openings:
Closed by weathertight covers:
Liquefied gas carriers...........................................172.195
Mobile offshore drilling units................................174.045(c)
Oil tankers...................................................172.065(g)
Subchapter O tankships...........................................172.150
Downflooding through:
General..................................................170.055(e), (f)
Mobile offshore drilling units....................174.035(b), 174.065(a)
Subchapter O barges...........................................172.090(d)
Sailing passenger vessels.....................................171.055(e)
Mobile offshore drilling units:
Closures for.....................................................174.100
Watertight, closed automatically..............................174.015(b)
Watertight, closed rapidly.......................................174.045
Passenger vessels:
Cockpit openings...........................................171.145(a)(2)
Collision bulkhead...............................................171.085
Special consideration, exposed weather decks..................171.122(f)

[[Page 188]]

Vessel sides.........................................Part 171, Subpart F
Watertight bulkheads.................................Part 171, Subpart E
Watertight, closed automatically:
Mobile offshore drilling units................................174.015(b)
Towing vessels................................................173.095(e)

                                 P

Passenger vessels, standards....................................Part 171
Penetrations (See Openings)
Permeability
Calculation of, Type I subdivision...............................171.066
Damage stability:
Liquefied gas carriers...........................................172.185
Mobile offshore drilling units...................................174.090
Oil tankers...................................................172.065(f)
Passenger vessels.............................................171.080(c)
Subchapter O tankships...........................................172.140
Defined.......................................................170.055(m)
Uniform average permeability:
Type I subdivision.........................................Table 171.068
Type II subdivision..............................................171.072
Plans:
Approval:
General.....................................Part 170, Subpart C, 170.180
Required.........................................................170.075
Specific.........................................................170.093
Submittal of............................................170.100, 170.180
Port lights......................................................171.116

                                 R

Repairs:
General..............................................170.001(b), 170.005
In way of fixed ballast.......................................170.235(b)
Roll stabilization tanks.........................................170.295
Rudders, towline pull criterion..................................173.095

                                 S

Sailing vessels:
Defined..................................................170.055(a), (1)
Intact stability standards:
Catamarans.......................................................171.057
Large passenger vessels..........................................171.055
Weather criterion................................................170.160
School ships (See Nautical school ships)
Shaft power, towline pull criterion..............................173.095
Shaft tunnels:
On passenger vessels.................................171.100, 171.106(c)
Watertight doors in...........................................170.260(d)
Short international voyages, vessels on:
Class 3 doors..............................................170.265(d)(1)
Defined.......................................................171.010(n)
Double bottoms not required................................171.105(h)(2)
Special considerations...........................................171.068
Side ports, passenger vessels....................................171.118
Sister vessel, stability test dispensed with..................170.175(c)

[[Page 189]]

Small passenger vessels, standards..............................Part 171
Stability booklets:
Contents of......................................................170.110
Lifting vessels, additional information..........................170.125
Submission and approval required.................................170.080
Vessels with Type III subdivision, additional information........170.135
Stability letters:
In lieu of stability booklet..................................170.110(e)
Required.........................................................170.120
Stability test:
General..........................................................170.175
Information required before test.................................170.085
Plans and information required at test...........................170.180
Preparations for test............................................170.185
Test procedure, modification of..................................170.190
Stern tubes, passenger vessels...................................171.100
Subdivision:
Oceanographic vessels...................................173.075, 173.085
Passenger vessels:
Additional requirements..............................Part 171, Subpart D
Calculations:
Type I................................171.065, 171.066, 171.067, 171.068
Type II........................................171.070, 171.072, 171.073
Type III.........................................................171.075
Requirements, large passenger vessels............................171.060
Trunks, effect of..........................................171.113(b)(3)
Subdivision load line (draft), passenger vessels:
Cockpits.................................................171.145(e), (f)
Dead cover locations..........................................171.117(b)
Deepest, defined..............................................171.010(b)
Openings in hull, small passenger vessels.....................171.119(a)
Port light locations.......................................171.116(b)(2)
Transverse damage extent, relationship to...........171.065(h)(2), Table 
                                                              171.080(a)
Ventilators and side port locations...........................171.118(c)
Superstructures:
Buoyancy of:
Liquefied gas carriers........................................172.195(e)
Oil tankers...................................................172.065(h)
Subchapter O tankships...........................................172.150
Integrity of, mobile offshore drilling units..................174.100(b)
Points of downflooding in:
General.......................................................170.055(e)
Mobile offshore drilling units.............................174.035(b)(1)
Port lights in, oceanographic vessels.........................173.085(k)

                                 T

Tank barge:
Assumed center of gravity for..............................170.200(b)(2)
Carrying oil in bulk.................................Part 172, Subpart D
Carrying Subchapter D cargoes other than oil.........Part 172, Subpart C
Carrying Subchapter O cargoes........................Part 172, Subpart E
Defined.......................................................170.055(q)
Tank vessel:
Assumed center of gravity........................................170.200
Defined.......................................................170.055(p)
Standards for...........................Part 172, Subparts C, D, E, F, G
Tests:

[[Page 190]]

Foam flotation material..........................................170.245
Stability...................................170.085, Part 170, Subpart F
Watertight doors.................................................170.270
Towboats. (See Towing)
Towing, standards for.......173.001(d), Part 173, Subpart E, 174.005(d), 
                                                     Part 174, Subpart E
Towline pull criterion...........................................173.095
Tugboats. (See Towing)
                                 U

Unusual proportion and form, vessels of..........................170.173

                                 V

Ventilators, automatic--passenger vessels........................171.118

                                 W

Watertight bulkheads:
Doors, standards for...............171.122, 171.124, Part 170, Subpart H
Liquefied gas carriers..................................172.175, 172.195
Mobile offshore drilling units..........................174.080, 174.085
Oceanographic vessels, ducts through..........................173.085(o)
Oil tankers......................................................172.065
Passenger vessels:
Above weatherdeck................................................171.122
Large passenger vessels, requirements.........171.065, 171.067, 171.068, 
                                                        171.070, 171.073
Machinery space..................................................171.095
Penetrations of......................................Part 171, Subpart E
Watertight floors................................................171.109
Subchapter D barges not carrying oil.............................172.050
Subchapter O barges..............................................172.104
Subchapter O tankships...............................172.133(d), 172.150
Watertight doors. (See Watertight bulkheads)
Weather criterion....................................Part 170, Subpart E
Wind heeling moment: MODU's.............174.035(b)(2), 174.045, 174.055, 
                                            174.065(a)(2), 174.100(d)(2)

[[Page 191]]