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CODE OF FEDERAL REGULATIONS – TITLE
33 – NAVIGATION AND NAVIGABLE WATERS
PART 183—BOATS AND ASSOCIATED EQUIPMENT
Subpart D—Safe Powering
(4) Quick
turn test procedure. Set throttle
at a low maneuvering speed and steer the boat straight ahead.
Turn the steering wheel 180 deg. in the direction of least
resistance in 1/2 second or less and hold it at that position
without changing the throttle or trim settings during or
after the wheel change. The boat completes the maneuver
successfully if it is capable of completing a 90 deg. turn
without the driver losing control of the boat or reducing
the throttle setting. Gradually increase the boat’s
turn entry speed incrementally until the boat does not complete
the Quick Turn Test successfully or successfully completes
it at maximum throttle.
Note: It is recognized
that operator skill and familiarity with a particular boat
and motor combination will affect the test results. It is
permissible to make a number of practice runs through the
quick turn test at any throttle setting.
(5) Test course method.
Set throttle for 30 miles per hour boat
speed and run the test course set up in accordance with
Figure 183.53, passing outside the designated avoidance
marker for 35 to 37.5 miles per hour without contacting
any of the course markers. If the boat successfully completes
this run of the test course, increase the throttle setting
to 35 to 37.5 miles per hour boat speed and run the course
passing outside the designated avoidance marker for that
speed without contacting any of the course markers. If the
boat successfully completes this run of the test course
and the motor was not at full throttle, increase the throttle
setting to 37.5 to 42.5 miles per hour boat speed and run
the course passing outside the designated avoidance marker
for that speed without contacting any of the course markers.
If the boat successfully completes this run of the test
course and the motor was not at full throttle, increase
the throttle setting to 42.5 miles per hour or more and
run the course passing outside the designated avoidance
marker for that speed without contacting any of the course
markers. If the boat successfully completes this run of
the test course and the motor was not at full throttle,
continue to increase the throttle setting and run the test
course passing outside the designated avoidance marker for
42.5 miles per hour or more until the boat fails to complete
the test successfully or the boat completes the test course
maneuvers successfully at full throttle. The boat successfully
completes the test course if the driver is able to maneuver
it between the designated avoidance markers without striking
the markers and without losing control of the boat or reducing
the throttle setting. There must be no change in position
of any equipment on board and there must be no change of
position of personnel in order to influence the test results.
There must be no instability evidenced by oscillating motion
in the roll or yaw axes exhibited while negotiating the
course.
Note: It is recognized
that operator skill and familiarity with a particular boat
and motor combination will affect the test results. It is
therefore considered permissible to make a number of practice
runs through the test course at any throttle setting.
(6) Maximum horsepower capacity.
(i) For boats capable of less than 35
miles per hour, the maximum horsepower capacity must be
the maximum horsepower with which the boat was able to successfully
complete the Quick Turn Test Procedure in Sec. 183.53(b)(4)
at full throttle or the maximum horsepower determined under
the calculations in Sec. 183.53(a) of this section.
(ii) For boats capable of 35 miles per
hour or more, the maximum horsepower capacity must be the
maximum horsepower with which the boat was able to successfully
complete both the Quick Turn Test Procedure in Sec. 183.53(b)(4)
and the Test Course Method in Sec. 183.53(b)(5) at full
throttle or the calculations in Sec. 183.53(a) of this section.(iii)
The maximum horsepower capacity determined in accordance
with Sec. 183.53(b) must not exceed 40 horsepower.
Figure
183.53—Boat Horsepower Capacity Test Course—35
MPH or More
[CGD 85-002, 51 FR 37574, Oct. 23, 1986]
Subpart E—[Reserved]
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