[Code of Federal Regulations]
[Title 33, Volume 2]
[Revised as of July 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 33CFR157.10]

[Page 457-458]
 
                TITLE 33--NAVIGATION AND NAVIGABLE WATERS
 
   CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED)
 
PART 157--RULES FOR THE PROTECTION OF THE MARINE ENVIRONMENT RELATING TO 
TANK VESSELS CARRYING OIL IN BULK--Table of Contents
 
             Subpart B--Design, Equipment, and Installation
 
Sec. 157.10  Segregated ballast tanks and crude oil washing systems for 
certain new vessels.

    (a) This section applies to a new vessel that:
    (1) Is constructed under a building contract awarded after June 1, 
1979;
    (2) In the absence of a building contract, has the keel laid or is 
at a similar stage of construction after January 1, 1980;
    (3) Is delivered after June 1, 1982; or
    (4) Has undergone a major conversion for which:
    (i) The contract is awarded after June 1, 1979;
    (ii) In the absence of a contract, conversion is begun after January 
1, 1980; or
    (iii) Conversion is completed after June 1, 1982.
    (b) Each tank vessel under this section of 20,000 DWT or more that 
carries crude oil and of 30,000 DWT or more that carries products must 
have segregated ballast tanks that have a total capacity to allow the 
vessel to meet the draft and trim requirements in paragraph (c) of this 
section without recourse to the use of cargo tanks for water ballast.
    (c) In any ballast condition during any part of a voyage, including 
that of lightweight with only segregated ballast, each tank vessel under 
paragraph (b) of this section must have the capability of meeting each 
of the following:
    (1) The molded draft amidship (dm) in meters, without taking into 
account vessel deformation, must not be less than dm in the following 
mathematical relationship:

dm = 2.0 + 0.02L
    (2) The drafts at the forward and after perpendiculars must 
correspond to those determined by the draft amidship under paragraph 
(c)(1) of this section, in association with a trim by the stern of no 
more than 0.015L.
    (3) The minimum draft at the after perpendicular is that which is 
necessary to obtain full immersion of the propeller.
    (d) Segregated ballast tanks required in paragraph (b) of this 
section, voids, and other spaces that do not carry cargo must be 
distributed:
    (1) For a vessel to which Sec. 157.10d applies, in accordance with 
Sec. 157.10d(c)(4); or,
    (2) For a vessel to which Sec. 157.10d does not apply, in accordance 
with the procedure contained in appendix C to this part.
    (e) Each tank vessel under this section of 20,000 DWT or more that 
carries crude oil must have a crude oil washing system that meets the 
design, equipment, and installation requirements in Subpart D of this 
part.
    (f) Each tank vessel under this section may be designed to carry 
ballast

[[Page 458]]

water in cargo tanks as allowed under Sec. 157.35.

[CGD 77-058b, 45 FR 43707, June 30, 1980, as amended by CGD 90-051, 57 
FR 36239, Aug. 12, 1992]