Regulation 46 CFR 169.230

§ 169.230

46 CFR Ch. I (10–1–11 Edition)

structural examinations within any
five year period regardless of the type
of water in which they operate. No
more than three years may elapse between any two examinations.
(c) If, during an internal structural
examination damage or deterioration
to the hull plating or structural members is discovered, the Officer in
Charge, Marine Inspection, may require the vessel to be drydocked or otherwise taken out of service to further
assess the extent of the damage and to
effect permanent repairs.
(d) Each vessel which has not met
with the applicable examination schedules in paragraphs (a) through (c) of
this section because it is on a voyage,
must undergo the required examinations upon completion of the voyage.
(e) The Commandant (CG–543) may
authorize extensions to the examination intervals specified in paragraphs
(a) and (b) of this section.

(4) The means for examining all
through-hull
fittings
and
appurtenances;
(5) The condition of the vessel, including the anticipated draft of the
vessel at the time of survey;
(6) A description of the hull protection system; and
(7) The name and qualifications of
any third party examiner.
(c) If your vessel is 15 years old or
older, the cognizant District Commander, on a case-by-case basis, may
approve an underwater survey instead
of a drydock examination at alternating intervals. You must submit an
application for an underwater survey
to the OCMI at least 90 days before
your vessel’s next required drydock examination. You may be allowed this
option if—
(1) The vessel is qualified under paragraphs (a)(2) through (4) of this section;
(2) Your application includes the information in paragraphs (b)(1) through
(b)(7) of this section; and
(3) During the vessel’s drydock examination, preceding the underwater survey, a complete set of hull gaugings
was taken and they indicated that the
vessel was free from appreciable hull
deterioration.
(d) After the drydock examination required by paragraph (c)(3) of this section, the OCMI submits a recommendation for future underwater surveys, the
results of the hull gauging, and the results of the Coast Guards’ drydock examination results to the cognizant District Commander, for review.

[CGD 84–024, 52 FR 39656, Oct. 23, 1987, as
amended at 53 FR 32232, Aug. 24, 1988; CGD
95–072, 60 FR 50468, Sept. 29, 1995; CGD 96–041,
61 FR 50734, Sept. 27, 1996; USCG–2000–6858, 67
FR 21083, Apr. 29, 2002; USCG–2009–0702, 74 FR
49239, Sept. 25, 2009]

pmangrum on DSK3VPTVN1PROD with CFR

§ 169.230 Underwater Survey in Lieu
of Drydocking (UWILD).
(a) The Officer in Charge, Marine Inspection (OCMI), on a case-by-case
basis, may approve an underwater survey instead of a drydock examination
at alternating intervals if your vessel
is—
(1) Less than 15 years of age;
(2) A steel or aluminum hulled vessel;
(3) Fitted with an effective hull protection system; and
(4) Listed in § 169.229(a)(1) or (2) of
this part.
(b) For vessels less than 15 years of
age, you must submit an application
for an underwater survey to the OCMI
at least 90 days before your vessel’s
next required drydock examination.
The application must include—
(1) The procedure for carrying out
the underwater survey;
(2) The time and place of the underwater survey;
(3) The method used to accurately determine the diver’s or remotely operated vehicle’s (ROV) location relative
to the hull;

[USCG–2000–6858, 67 FR 21083, Apr. 29, 2002]

§ 169.231 Definitions relating to hull
examinations.
As used in the part—
(a) Drydock examination means hauling out a vessel or placing a vessel in a
drydock or slipway for an examination
of all accessible parts of the vessel’s
underwater body and all through-hull
fittings, sea chests, sea valves, sea
strainers, and valves for the emergency
bilge suction.
(b) Underwater survey means the examination of the vessel’s underwater
hull including all through-hull fittings
and appurtenances, while the vessel is
afloat.

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