Table of Contents:

Overview

Part 1

Part 2

Part 3

Electrical

Fuel Systems

Ventilation

Safe Loading

Safe Loading - Table of Contents

Introduction

Applicability

Definitions

The Static Float-Plane

Calculation

Categories One

Categories Two

Categories Three

Display of Capacity

Figures & Tables

Appendix A

Appendix B

References

Flotation

Downloads

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Applicability

FEDERAL LAW

183.31 - Applicability

This subpart applies to monohull boats less than 20 feet in length except sailboats, canoes, kayaks, and inflatable boats.

For the purpose of this subpart, a monohull is defined as: a boat on which the line of intersection of the water surface and the boat at any operating draft forms a single closed curve or "footprint." A pontoon boat is not a monohull, but a catamaran would be if the top of the "tunnel" between the two hulls touches the water aft when in a static position and loaded with water, fuel and passengers. The footprint, in this case, will be a continuous line.

A canoe or kayak or similar watercraft is defined as: a watercraft designed to be manually propelled or equipped with a low horsepower motor whose ends do not have a transverse dimension greater than 45% of the maximum beam and whose length to beam ratio is as specified below:

Length Length/Beam Ratio
14 Feet or Less 3:1 to 5:1
Over 14 Feet to 16 Feet 4:1 to 6:1
Over 16 Feet 5:1 to 8:1

An inflatable boat is defined as: any craft that achieves and maintains its intended shape and buoyancy through the medium of inflation. This includes RIBs.

A sailboat is defined as: a boat designed or intended to use sails as the primary means of propulsion.

Discussion:
This regulation applies only to monohull boats of less than 20 feet, the size range where the Coast Guard has found the largest number of accidents.

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