(2) PROPOSED
STANDARDS
FOR
ICEBREAKING 
OPERATIONS.—The proposed standards, the impact of 
the adoption of which is evaluated in subclauses (II) 
and (III) of paragraph (1)(B)(i), are the following: 
(A) Except as provided in subparagraph 
(B), the ice-covered waterways in the Great 
Lakes shall be open to navigation not less than 
90 percent of the hours that vessels engaged in 
commercial service and ferries attempt to transit 
such ice-covered waterways. 
(B) In a year in which the Great Lakes are 
not open to navigation, as described in subpara-
graph (A), because of ice of a thickness that oc-
curs on average only once every 10 years, ice- 
covered waterways in the Great Lakes shall be 
open to navigation at least 70 percent of the 
hours that vessels engaged in commercial service 
and ferries attempt to transit such ice-covered 
waterways. 
(3) REPORT BY COMMANDANT.—Not later than 
90 days after the date on which the Comptroller Gen-
eral submits the report under paragraph (1), the 
Commandant shall submit to the Committee on Com-
merce, Science, and Transportation of the Senate and 
the Committee on Transportation and Infrastructure 
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of the House of Representatives a report that includes 
the following: 
(A) A plan for Coast Guard implementation 
of any recommendation made by the Comptroller 
General under paragraph (1)(B)(ii) with which 
the Commandant concurs. 
(B) With respect to any recommendation 
made under paragraph (1)(B)(ii) with which the 
Commandant does not concur, an explanation of 
the reasons why the Commandant does not con-
cur. 
(C) A review of, and a proposed implemen-
tation plan for, the results of the fleet mix anal-
ysis under paragraph (1)(B)(i)(III). 
(D) Any proposed modifications to current 
Coast Guard standards for icebreaking oper-
ations in the Great Lakes. 
(4) PILOT PROGRAM.—During the 5 ice seasons 
following the date of enactment of this Act, the Coast 
Guard shall conduct a pilot program to determine the 
extent to which the current Coast Guard Great Lakes 
icebreaking cutter fleet can meet the proposed stand-
ards described in paragraph (2). 
(b) DATA
ON ICEBREAKING OPERATIONS
IN
THE 
GREAT LAKES.— 
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(1) IN GENERAL.—The Commandant shall col-
lect, during ice season, archive, and disseminate data 
on icebreaking operations and transits on ice-covered 
waterways in the Great Lakes of vessels engaged in 
commercial service and ferries. 
(2) ELEMENTS.—Data collected, archived, and 
disseminated under paragraph (1) shall include the 
following: 
(A) Voyages by vessels engaged in commer-
cial service and ferries to transit ice-covered wa-
terways in the Great Lakes that are delayed or 
canceled because of the nonavailability of a suit-
able icebreaking vessel. 
(B) Voyages attempted by vessels engaged in 
commercial service and ferries to transit ice-cov-
ered waterways in the Great Lakes that do not 
reach their intended destination because of the 
nonavailability of a suitable icebreaking vessel. 
(C) The period of time that each vessel en-
gaged in commercial service or ferry was delayed 
in getting underway or during a transit of ice- 
covered waterways in the Great Lakes due to the 
nonavailability of a suitable icebreaking vessel. 
(D) The period of time elapsed between each 
request for icebreaking assistance by a vessel en-
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gaged in commercial service or ferry and the ar-
rival of a suitable icebreaking vessel and whether 
such icebreaking vessel was a Coast Guard or 
commercial asset. 
(E) The percentage of hours that Great 
Lakes ice-covered waterways were open to navi-
gation while vessels engaged in commercial serv-
ice and ferries attempted to transit such water-
ways for each ice season after the date of enact-
ment of this Act. 
(F) Relevant communications of each vessel 
engaged in commercial service or ferry with the 
Coast Guard or commercial icebreaking service 
providers with respect to subparagraphs (A) 
through (D). 
(G) A description of any mitigating cir-
cumstance, such as Coast Guard Great Lakes ice-
breaker diversions to higher priority missions, 
that may have contributed to the amount of time 
described in subparagraphs (C) and (D) or the 
percentage of time described in subparagraph 
(E). 
(3) VOLUNTARY REPORTING.—Any reporting by 
operators of commercial vessels engaged in commer-
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cial service or ferries under this section shall be vol-
untary. 
(4) PUBLIC
AVAILABILITY.—The Commandant 
shall make the data collected, archived, and dissemi-
nated under this subsection available to the public on 
a publicly accessible internet website of the Coast 
Guard. 
(5) CONSULTATION WITH INDUSTRY.—With re-
spect to the Great Lakes icebreaking operations of the 
Coast Guard and the development of the data col-
lected, archived, and disseminated under this sub-
section, the Commandant shall consult operators of— 
(A) vessels engaged in commercial service; 
and 
(B) ferries. 
(c) REPORT
ON COMMON HULL DESIGN.—Section 
8105 of the William M. (Mac) Thornberry National Defense 
Authorization Act for Fiscal Year 2021 (Public Law 116– 
283) is amended by striking subsection (b) and inserting 
the following: 
‘‘(b) REPORT.—Not later than 90 days after the date 
of enactment of this subsection, the Commandant shall sub-
mit to the Committee on Commerce, Science, and Transpor-
tation of the Senate and the Committee on Transportation 
and Infrastructure of the House of Representatives a report 
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