[Code of Federal Regulations]
[Title 46, Volume 2]
[Revised as of October 1, 2004]
From the U.S. Government Printing Office via GPO Access
[CITE: 46CFR69.53]

[Page 391-392]
 
                           TITLE 46--SHIPPING
 
   CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED)
 
PART 69_MEASUREMENT OF VESSELS--Table of Contents
 
                 Subpart B_Convention Measurement System
 
Sec. 69.53  Definitions.

    As used in this subpart--
    Amidships means the midpoint of the registered length, as 
``registered length'' is defined in this section.
    Cargo space means an enclosed space appropriated for the transport 
of cargo which is to be discharged from the vessel. The term does not 
include a space which qualifies as an excluded space under Sec. 69.61.
    Enclosed space is defined in Sec. 69.59.

[[Page 392]]

    Excluded space is defined in Sec. 69.61.
    Gross tonnage or GT means the tonnage determined under Sec. 69.57.
    Line of the upper deck means a longitudinal line at the underside of 
the upper deck or, if that deck is stepped, the longitudinal line of the 
underside of the lowest portion of that deck parallel with the upper 
portions of that deck.
    Molded depth means the vertical distance amidships between the 
following points:
    (a) From the line of the upper deck at the vessel's side or, if the 
vessel has rounded gunwales, from the intersection of the line of the 
upper deck extended to the molded line of the shell plating as though 
the gunwales were of angular design.
    (b) To the top of the flat keel, to the lower edge of the keel 
rabbet if the vessel is of wood or composite structure, or to the point 
where the line of the flat of the bottom extended inward cuts the side 
of the keel if the vessel's lower part is hollow or has thick garboards.
    Molded draft means--
    (a) For vessels assigned a load line under parts 42, 44, 45, or 47 
of this chapter, the draft corresponding to the Summer Load Line (other 
than a timber load line);
    (b) For passenger vessels assigned a load line under part 46 of this 
chapter, the draft corresponding to the deepest subdivision load line 
assigned;
    (c) For vessels to which parts 42, 44, 45, 46, or 47 of this chapter 
do not apply but which otherwise have been assigned a load line, the 
draft corresponding to the Summer Load Line so assigned;
    (d) For vessels to which no load line has been assigned but the 
draft of which is restricted under any Coast Guard requirement, the 
maximum draft permitted under the restriction; and
    (e) For other vessels, 75 per cent of the molded depth.
    Net tonnage or NT means tonnage determined under Sec. 69.63.
    Passenger means a person on board a vessel other than--
    (a) The master, a member of the crew, or other person employed or 
engaged in any capacity in the business of the vessel; and
    (b) A child under one year of age.
    Registered breadth means the maximum breadth of a vessel measured 
amidships to the molded line of the frame in a vessel with a metal shell 
and to the outer surface of the hull in all other vessels.
    Registered length means either 96 percent of the length on a 
waterline at 85 percent of the least molded depth measured from the top 
of the flat keel or the length from the fore side of the stem to the 
axis of the rudder stock on that waterline, whichever is greater. In 
vessels designed with a rake of keel, this length is measured on a 
waterline parallel to the design waterline.
    Upper deck means the uppermost complete deck exposed to weather and 
sea, which has permanent means of weathertight closing of all openings 
in the weather part of the deck, and below which all openings in the 
sides of the vessel are fitted with permanent means of watertight 
closing.
    Weathertight means secure against penetration of water into the 
vessel in any sea condition.