TITLE 46 - US CODE - CHAPTER 145 - REGULATORY MEASUREMENT

TITLE 46 - US CODE - SUBCHAPTER I - GENERAL

46 USC 14501 - Application

This chapter applies to the following:
(1) a vessel not measured under chapter 143 of this title if
(A) the vessel is to be documented under chapter 121 of this title; or
(B) the application of a law of the United States to the vessel depends on the vessels tonnage.
(2) a vessel measured under chapter 143 of this title if the owner requests that the vessel also be measured under this chapter as provided in section 14305 of this title.

46 USC 14502 - Measurement

The Secretary shall measure a vessel to which this chapter applies in the way provided by this chapter.

46 USC 14503 - Certificate of measurement

The Secretary shall prescribe the certificate to be issued as evidence of a vessels measurement under this chapter.

46 USC 14504 - Remeasurement

(a) To the extent necessary, the Secretary shall remeasure a vessel to which this chapter applies if
(1) the Secretary or the owner alleges an error in its measurement;
(2) the vessel or the use of its space is changed in a way that substantially affects its tonnage;
(3) after being measured under subchapter III of this chapter, the vessel becomes subject to subchapter II of this chapter because the vessel or its use is changed; or
(4) although not required to be measured under subchapter II of this chapter, the vessel was measured under subchapter II and the owner requests that the vessel be measured under subchapter III of this chapter.
(b) Except as provided in this section and chapter 143 of this title, a vessel that has been measured does not have to be remeasured to obtain another document or endorsement under chapter 121 of this title.

TITLE 46 - US CODE - SUBCHAPTER II - FORMAL SYSTEMS

46 USC 14511 - Application

This subchapter applies to a vessel described in section 14501 of this title if
(1) the owner requests; or
(2) the vessel is
(A) self-propelled;
(B) at least 24 meters (79 feet) overall in length; and
(C) not operated only for pleasure.

46 USC 14512 - Standard tonnage measurement

(a) The Secretary shall prescribe regulations for measuring the gross and net tonnages of a vessel under this subchapter. The regulations shall provide for tonnages comparable to the tonnages that could have been assigned under sections 4151 and 4153 of the Revised Statutes of the United States, as sections 4151 and 4153 existed immediately before the enactment of this section.
(b) On application of the owner or master of a vessel of the United States used in foreign trade, the Secretary may attach an appendix to the vessels register stating the measurement of spaces that may be deducted from gross tonnage under laws and regulations of other countries but not under those of the United States.

46 USC 14513 - Dual tonnage measurement

(a) On application by the owner and approval by the Secretary, the tonnage of spaces prescribed by the Secretary may be excluded in measuring under this section the gross tonnage of a vessel measured under section 14512 of this title. The spaces prescribed by the Secretary shall be comparable to the spaces that could have been excluded under section 2 of the Act of September 29, 1965 (Public Law 89219, 79 Stat. 891), as section 2 existed immediately before the enactment of this section.
(b) The Secretary shall prescribe the design, location, and dimensions of the tonnage mark to be placed on a vessel measured under this section.
(c) 
(1) If a vessels tonnage mark is below the uppermost part of the load line marks, each certificate stating the vessels tonnages shall state the gross and net tonnages when the mark is submerged and when it is not submerged.
(2) Except as provided in paragraph (1) of this subsection, a certificate stating a vessels tonnages may state only one set of gross and net tonnages.

TITLE 46 - US CODE - SUBCHAPTER III - SIMPLIFIED SYSTEM

46 USC 14521 - Application

This subchapter applies to a vessel described in section 14501 of this title that is not measured under subchapter II of this chapter.

46 USC 14522 - Measurement

(a) In this section, length means the horizontal distance of the hull between the foremost part of the stem and the aftermost part of the stern, excluding fittings and attachments.
(b) 
(1) The Secretary shall assign gross and net tonnages to a vessel based on its length, breadth, depth, other dimensions, and appropriate coefficients.
(2) The Secretary shall prescribe the way dimensions (except length) are measured and which coefficients are appropriate.
(c) The resulting gross tonnages, taken as a group, reasonably shall reflect the relative internal volumes of the vessels measured under this subchapter. The resulting net tonnages shall be in approximately the same ratios to corresponding gross tonnages as are the net and gross tonnages of comparable vessels measured under subchapter II of this chapter.
(d) Under regulations prescribed by the Secretary, the Secretary may determine the gross and net tonnages of a vessel representative of a designated class, model, or type, and then assign those gross and net tonnages to other vessels of the same class, model, or type.