[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: 46CFR69.103]

[Page 397-398]
 
                           TITLE 46--SHIPPING
 
   CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED)
 
PART 69_MEASUREMENT OF VESSELS--Table of Contents
 
                  Subpart C_Standard Measurement System
 
Sec. 69.103  Definitions.

    As used in this subpart--

[[Page 398]]

    Between-deck means the space above the line of the tonnage deck and 
below the line of the deck next above.
    Break means the space between the line of a deck and the upper 
portion of that deck, in cases where that deck is stepped and continued 
at a higher elevation.
    Camber means the perpendicular rise or crown of a deck at the 
centerline of the vessel measured above the skin of the vessel at the 
vessel's sides.
    Ceiling means the permanent planking or plating fitted directly on 
the inboard side of frames, floors, or double bottom and includes cargo 
battens and refrigeration insulation but does not include false ceiling 
which stands off from the framing.
    Coaming means both the vertical plating around a hatch or skylight 
and the sill below an opening in a bulkhead.
    Deckhouse means a structure that is on or above the uppermost 
complete deck and that does not extend from side to side of the vessel. 
The term includes cabin trunks and closed-in spaces over the holds of 
vessels.
    Depth of frame means the perpendicular depth of a bottom frame and 
the athwart distance between the inboard and outboard faces of a side 
frame.
    Double bottom means a space at the bottom of a vessel between the 
inner and outer bottom plating and used solely for water ballast.
    Floor means a vertical plate or timber extending from bilge to bilge 
in the bottom of a vessel. In a wooden vessel, ``floor'' means the 
lowermost timber connecting the main frames at the keel when that timber 
extends the full depth of the frames to which it is fastened. In a 
double bottom, floors usually extend from the outer to the inner bottom.
    Gross tonnage is defined in Sec. 69.107(a).
    Hatch means an opening in a deck through which cargo is laden or 
discharged.
    Line of tonnage deck means the line determined under Sec. 
69.109(e).
    Line of uppermost complete deck means the line determined under 
Sec. 69.111(b).
    Net tonnage is defined in Sec. 69.107(b).
    Registered breadth is defined in Sec. 69.53.
    Registered depth means ``molded depth'' as defined in Sec. 69.53.
    Registered length is defined in Sec. 69.53.
    Shelter deck means the uppermost deck that would have qualified as 
the uppermost complete deck had it not been fitted with a middle line 
opening.
    Step means a cutoff in a deck or in the bottom, top, or sides of a 
space resulting in varying heights of a deck or varying heights or 
widths of a space.
    Superstructure means all permanent structures (such as forecastle, 
bridge, poop, deckhouse, and break) on or above the line of the 
uppermost complete deck or, if the vessel has a shelter deck, on or 
above the line of the shelter deck.
    Tonnage deck is defined in Sec. 69.109(c).
    Tonnage length is defined in Sec. 69.109(f).
    Uppermost complete deck means the uppermost deck--
    (a) Which extends from stem to stern and from side to side at all 
points of its length;
    (b) The space below which is enclosed by the sides of the vessel;
    (c) Through which there is no opening that would exempt the space 
below from being included in gross tonnage; and
    (d) Below which there is no opening through the hull that would 
exempt the space below from being included in gross tonnage.