Review of U.S. Coast Guard Vessel Stability Regulations (2018)

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100 APPENDIX F OUTLINE OF POTENTIAL SUBCHAPTER S REORGANIZATION Part A. General Applicability 1. U.S. Vessels Meet Subchapter S 2. Safety of Life at Sea (SOLAS) Vessels Meet Applicable SOLAS Rules Part B. General Definitions (No Particular Order as Listed) 1. Location of Intact Stability Downflooding Points 2. Location of Damaged Stability Downflooding Points 3. Watertight/Weathertight (WT) 4. Margin Line Location a. Sufficient/Insufficient Sheer Correction (Include Good Figures) b. Stepped/Well Decks 5. Standard Damage Characteristics a. Treatment of Buoyant Appendages (Shaft Tunnels, WT Blisters) 6. Free Surface Effects 7. Damaged Tank Runoff 8. Vessel Free to Trim 9. Requirements to be Included in Buoyant Volume in Stability Calculations 10. Vessel Operating Zones a. Protected/Partially/Exposed b. Rivers and Lakes/Bays/Sounds, Great Lakes, Coastwise, Oceans i. Coastwise < 20 Nautical Miles (NM) from Refuge, < 20 NM from Coast, < 100 NM, etc. 11. WT Bulkheads (Bhd) a. WT Bhd Construction b. Doors in WT Bhd 12. Determination of Lightship Characteristics 13. Fixed and Liquid Ballast 14. Foam and Air Tank Flotation 15. Drainage

101 16. Permeability 17. Standard Operating Conditions for Stability Calculations 18. Assumptions for Cargo Weights and Vertical Center of Gravity (VCG) (for example, cars and trucks on ferries) 19. Use of Stability Loading Calculation Programs On Board the Vessel (Stability Instruments) Parts C (to x) as Needed. Individual Vessel Class Requirements 1. Watertight Integrity 2. Weathertight Integrity a. Door Sill Heights Versus Location b. Removable Door Sills 3. Intact Stability Requirements 4. Damaged Stability Requirements a. WT Bhd Locations b. Area Under Righting Arm (RA), Heel Angles. Downflooding Criteria List of Possible Vessel Classes for Parts C (to x), as Needed (non-SOLAS) 1. Power Large Passenger Vessels (Subchapters T/K/H) a. Meet Full Intact and Damaged Stability Workup 2. Power Small Passenger Vessels (T) a. Perform Simplified Intact Stability Test b. WT Bhd Spacing from Simplified Calcs 179.220 3. Sail Large Passenger Vessels (T/K/H) a. Meet Full Intact and Damaged Stability Workup 4. Sail Small Passenger Vessels (T) a. Perform Simplified Intact Stability Test b. WT Bhd Spacing from Simplified Calcs 179.220 5. Power School Ships 6. Sail School Ships 7. Tug and Tow Boats

102 a. Pushing Only b. Towing on a Hawser 8. Articulated Tug/Barge a. Connected b. Separated 9. Tank Barges 10. Dry Barges 11. Offshore Support Vessels a. Crew/Cargo Boats (Pure Pax Only Group 1 or 2) b. Platform Support (Deck and Bulk/Tank Cargo) c. Anchor Handling e. Exploration (Towed Sonar Strings) d. Lifting with Crane if Applicable to Above 12. Tank Vessels 13. Dry Cargo Vessels 14. Lift Boats a. Elevated b. Floating 15. Fishing Vessels 16. Crane Barges/Vessels 17. Oceanographic Research Vessels 18. Mobile Offshore Units 19. Hopper Dredges 20. Liquefied Gas Carriers Part D SOLAS Vessels Similar to Part C in format but applicable to vessels with SOLAS certificates. In many cases, International Maritime Organization (IMO) stability regulations are incorporated by reference.

103 References to Subchapter S, Parts 170 and 171 in Other Subchapters A caution with any major reorganization of Subchapter S is that there are many references to Subchapter S requirements in other parts of the CFR. These other parts would all need updating if Subchapter S is reorganized. Table F-1 provides examples of the many such references, so the magnitude of the issue can be appreciated. Table F-1 References to Subchapter S, Parts 170 and 171, in Other Subchapters Subchapter Part in That Subchapter Refers to Part ... in Subchapter S Subchapter C § 28.545 170.050 § 28.570 170.173(c) Subchapter K § 115.306 170.120 § 115.402 170.175 § 116.120 170 and 171 Subchapter T § 176.402 170.175 § 178.215 170.090 § 178.230 170, Subpart C § 178.310 170 § 178.310 171 § 178.310 171.055, 171.57 § 178.310 170.170, 170.055 § 178.310 171, Subparts A and B § 178.330 170.090 § 178.420 170.170, 170.173 § 178.420 171.050, 171.055, 171.057 § 178.420 171.070, 171.072, 171.073 § 178.420 171.080 § 178.430 170.170, 170.173 § 178.430 171.050, 171.055, 171.057 § 178.430 171.080 § 178.510 170 and 171 § 179.212 171.070–171.073, 171.080 § 179.330 170, Subpart H § 179.340 171.113 § 180.202 171.070, 171.073, 171.080, 171.085 Subchapter U § 189.55–5 Part 170 Subchapter M § 144.305 170.170, 170.173, 174.145 § 144.305 173, Subpart E § 144.310 173, Subpart B

104 Subchapter D § 32.63–5 172.050 Subchapter S § 170.165 170.170 § 170.173 170.170 § 170.200 170.170, 172.065 § 170.245 171.070, 171.095, 173.063 § 173.063 170.170, 171.050, 171.055 § 173.075 171.070, 171.072, 171.073 § 173.080 171.080 § 174.020 170, Subparts C, E § 174.185 170.170, 171.173 § 174.190 171.085 § 174.210 170, Subpart H § 174.310 170.170, 170.173, 170.300 § 174.335 170.270 § 174.360 170.110 33 CFR Subchapter O § 151.37 172, Subpart F