Review and Update of U.S. Coast Guard Vessel Stability Regulations and Guidance (2019) / Chapter Skim
Currently Skimming:
Pages 13-24
The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
Select key terms on the right to highlight them within pages of the chapter.
From page 13... ...
13 2 Background This chapter provides a brief review of vessel stability as needed to understand the concepts and terminology presented in subsequent chapters. The review repeats the discussion on this subject matter from the committee's Phase 1 letter report.1 This background is followed by an overview of the U.S.
|
From page 14... ...
14 USCG VESSEL STABILITY REGULATIONS AND GUIDANCE surface effects of slack tanks, the lifting of gear and cargo over the side, or the tripping forces from a towed vessel. The interaction of these many forces will determine a vessel's stability and its ability to remain upright (see Figures 2-1a and 2-1b)
|
From page 15... ...
BACKGROUND 15 displacement and waterplane inertia, allowing a designer or shipyard of that period to perform the required initial stability calculations. Vessel stability results from the association of the downward force of the vessel's weight centered at the center of mass and the upward force of the buoyancy centered at the center of the immersed volume.
|
From page 16... ...
16 USCG VESSEL STABILITY REGULATIONS AND GUIDANCE FIGURE 2-3 Righting arm (RA) , also referred to as GZ (the horizontal distance between the center of gravity [G]
|
From page 17... ...
BACKGROUND 17 FIGURE 2-4 Righting arm curve. NOTE: Righting Arm (RA)
|
From page 18... ...
18 USCG VESSEL STABILITY REGULATIONS AND GUIDANCE U.S. FLEET SUBJECT TO COAST GUARD STABILITY REGULATION Evaluating U.S.
|
From page 19... ...
BACKGROUND 19 TABLE 2-2 U.S.-Inspected Fleet -- Cargo Vessels by Propulsion Cargo Vessel Type Inspection Subchapter TotalD I I-A O OD OI L Self-propelled 74 473 1 0 42 6 312 908 Non-self-propelled 948 234 4 6 3,256 139 12 4,599 Total 1,022 707 5 6 3,298 145 324 5,507 NOTE: Discrepancies in the tables and charts are due to inconsistencies in the raw MISLE data, such as missing or incorrect entries. SOURCE: USCG, MISLE (data as of May 20, 2019)
|
From page 20... ...
20 USCG VESSEL STABILITY REGULATIONS AND GUIDANCE TABLE 2-4 U.S.-Inspected Fleet by Route and SOLAS Passenger Vessels Non-Ocean-Going Ocean-Going Total SOLAS 16 14 30 Non-SOLAS 5,054 1,251 6,305 Total 5,070 1,265 6,335 Cargo Vessels Non-Ocean-Going Ocean-Going Total SOLAS 0 335 335 Non-SOLAS 4,530 1,266 5,796 Total 4,530 1,601 6,131 NOTES: Passenger vessels in the International Convention for the Safety of Life at Sea ( SOLAS) category are those that have a valid Passenger Ship Safety Certificate.
|
From page 21... ...
21 T A B L E 2 -5 N um be r of A ll A ct iv e, I ns pe ct ed , U .S .
|
From page 22... ...
22 USCG VESSEL STABILITY REGULATIONS AND GUIDANCE It merits noting that in addition to the vessels in Tables 2-1 to 2-5, the domestic fleet contains thousands of additional uninspected vessels, including towing, fishing, work, and recreational boats. Other than the larger fishing vessels, the USCG generally does not directly regulate the stability of the uninspected vessels.
|
From page 23... ...
BACKGROUND 23 contributing factor in the SS El Faro loss, the MBI report recommended tracking of weight changes (see Recommendation 6 of the MBI report)
|
Key Terms
This material may be derived from roughly machine-read images, and so is provided only to facilitate research.
More
information on Chapter Skim is available.