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Safe Loading
Subpart C — Safe Loading
33 CFR Sections 183.31-183.43
Revised as of July 1, 2000
Subpart C divides boats that must comply with
this regulation into three categories:
- Inboard and sterndrive boats;
- Outboard boats;
- Boats rated for manual propulsion and boats
rated for engines of two horsepower or less.
Each one of these categories must comply with
two distinct capacity regulations, namely: maximum weight
capacity and persons capacity. The Guideline shows the calculations
necessary for design and production considerations and describes
the test methods used. It will lead you through a step-by-step
method to complete the calculations required.
Two of the concepts that are part of the requirements
and calculations in this subpart are common to all three categories
of boats. These two terms are static float-plane and maximum
displacement. In order not to repeat the methods of determining
these in each category, we discuss them under separate sections
3.0 and 4.0. Read these sections first, and become familiar
with the concept and the method you will follow to determine
both static float-plane and maximum displacement on your boats.
It will help to simplify working with the requirements once
you know where the float-plane is located and what the displacement
of the boat is, relative to this float-plane.
Starting in section 5.0 we follow the regulation
as it is written. We discuss its meaning and
various details that need clarification, and then we offer
an actual example of its calculations.
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