Class six. Vessels of which the tonnage length according to the above measurement is above two hundred and fifty feet into sixteen equal parts.

Then, the hold being sufficiently cleared to admit of the required depths and breadths being properly taken, find the transverse area of such vessel at each point of division of the length as follows:

Measure the depth at each point of division from a point at a distance of one-third of the round of the beam below such deck; or, in case of a break, below a line stretched in continuation thereof, to the upper side of the floor-timber, at the inside of the limber-strake, after deducting the average thickness of the ceiling, which is between the bilge-planks and limber-strake; then, if the depth at the midship division of the length do not exceed sixteen feet, divide each depth into four equal parts; then measure the inside horizontal breadth, at each of the three points of division, and also at the upper and lower points of the depth, extending each measurement to the average thickness of that part of the ceiling which is between the points of measurement; number these breadths from above, numbering the upper breadth one, and so on down to the lowest breadth; multiply the second and fourth by four, and the third by two; add these products together, and to the sum add the first breadth and the last, or fifth; multiply the quantity thus obtained by one-third of the common interval between the breadths, and the product shall be deemed the transverse area; but if the midship depth exceed sixteen feet, divide each depth into six equal parts, instead of four, and measure as before directed, the horizontal breadths at the five points of division, and also at the upper and lower points of the depth; number them from above as before; multiply the second, fourth, and sixth by four, and the third and fifth by two; add these products together, and to the sum add the first breadth and the last, or seventh; multiply the quantities thus obtained by one-third of the common interval between the breadths, and the product shall be deemed the transverse area.

Having thus ascertained the transverse area at each point of division of the length of the vessel, as required above, proceed to ascertain the register tonnage of the vessel in the following manner:

Number the areas successively one, two, three, and so forth, number one being at the extreme limit of the length at the bow, and the last number at the extreme limit of the length at the stern; then, whether the length be divided according to the table into six or sixteen parts, as in classes one and six, or any intermediate number, as in classes two, three, four, and five, multiply the second, and every even-numbered area by four, and the third, and every odd-numbered area, except the first and last, by two; add these products together, and to the sum add the

first and last if they yield anything; multiply the quantities thus obtained by one-third of the common interval between the areas, and the product will be the cubical contents of the space under the tonnage-deck; divide this product by one hundred, and the quotient, being the tonnage under the tonnage-deck, shall be deemed to be the register tonnage of the vessel subject to the additions hereinafter mentioned.

15. Deck-houses, breaks, etc.

Mar. 2, 1895.
Sec. 1 (h).

If there be a break, a poop, or any other permanent R. S., 4153. closed-in space on the upper deck, available for cargo, or stores, or for the berthing or accommodation of passengers or crew, the tonnage of that space shall be ascertained as follows and added to the gross tonnage:

Measure the internal mean length of such space in feet, and divide it into an even number of equal parts of which the distance asunder shall be most nearly equal to those into which the length of the tonnage-deck has been divided; measure at the middle of its height the inside breadths; namely, one at each end and at each of the points of division, numbering them successively one, two, three, and so forth; then to the sum of the end breadths add four times the sum of the even-numbered breadths and twice the sum of the odd-numbered breadths, except the first and last, and multiply the whole sum by onethird of the common interval between the breadths; the product will give the mean horizontal area of such space; then measure the mean height between the planks of the decks, and multiply by it the mean horizontal area; divide the product by one hundred, and the quotient shall be deemed to be the tonnage of such space, and shall be added to the tonnage under the tonnage-decks, ascertained as aforesaid: Provided, That nothing shall be added to the gross tonnage for any sheltered space above the upper deck which is under cover and open to the weather; that is, not inclosed.

16. Hatchways.

The cubical contents of the hatchways shall be obtained Feb. 6, 1909. by multiplying the length and breadth together and the product by the mean depth taken from the top of beam to the under side of the hatch. From the aggregate tonnage of the hatchways there shall be deducted one-half of one per cent of the gross tonnage and the remainder only shall be added to the gross tonnage of the ship exclusive of the tonnage of the hatchways.

17. Between-decks.

If a vessel has a third deck, or spar deck, the tonnage R. S., 4153. of the space between it and the tonnage-deck shall be ascertained as follows:

Measure in feet the inside length of the space, at the middle of its height, from the plank at the side of the stem to the plank on the timbers at the stern, and divide

R. S., 4153.

Mar. 2, 1895

Feb. 6, 1909.
Sec. 2.

Aug. 5, 1882.

Mar. 2, 1895.

the length into the same number of equal parts into which the length of the tonnage-deck is divided; measure, also at the middle of its height, the inside breadth of the space at each of the points of division, also the breadth of the stem and the breadth at the stern; number them successively one, two, three, and so forth, commencing at the stem; multiply the second, and all other even-numbered breadths, by four, and the third, and all the other oddnumbered breadths, except the first and last, by two; to the sum of these products add the first and last breadths, multiply the whole sum by one-third of the common interval between the breadths, and the result will give, in superficial feet, the mean horizontal area of such space; measure the mean height between the plank of the two decks, and multiply by it the mean horizontal area, and the product will be the cubical contents of the space; divide this product by one hundred, and the quotient shall be deemed to be the tonnage of such space, and shall be added to the other tonnage of the vessel ascertained as above directed. And if the vessel has more than three decks, the tonnage of each space between decks, above the tonnage-deck, shall be severally ascertained in the manner above described, and shall be added to the tonnage of the vessel, ascertained as above directed.

18. Open vessels.

In ascertaining the tonnage of open vessels the upper edge of the upper strake is to form the boundary-line of measurement, and the depth shall be taken from an athwartship line, extending from the upper edge of such strake at each division of the length.

19. Water ballast.

In the case of a ship constructed with a double bottom for water ballast, if the space between the inner and outer plating thereof is certified by the collector to be not available for the carriage of cargo, stores, or fuel, then the depth of the vessel shall be taken to be the upper side of the inner plating of the double bottom, and that upper side shall for the purposes of measurement be deemed to represent the floor timber. From the gross tonnage there shall be deducted any other space adapted only for water ballast certified by the collector not to be available for the carriage of cargo, stores, supplies, or fuel.

20. Net tonnage.

From the gross tonnage of every vessel of the United States there shall be deducted

21. Crew accommodations.

(a) The tonnage of the spaces or compartments occupied by or appropriated to the use of the crew of the vessel. Every place appropriated to the crew of the vessel shall have a space of not less than seventy-two cubic feet

and not less than twelve superficial feet, measured on the deck or floor of that place, for each seaman or apprentice lodged therein. The provisions of this Act requiring a crew space of seventy-two cubic feet per man shall apply only to vessels the construction of which shall be begun after June thirtieth, eighteen hundred and ninety-five. Such place shall be securely constructed, properly lighted, drained, and ventilated, properly protected from weather and sea, and as far as practicable properly shut off and protected from the effluvium of cargo or bilge water; and failure to comply with this provision shall subject the owner to a penalty of five hundred dollars. Every place so occupied shall be kept free from goods or stores of any kind not being the personal property of the crew in use during the voyage; and if any such place is not so kept free the master shall forfeit and pay to each seaman or apprentice lodged in that place the sum of fifty cents a day for each day during which any goods or stores as aforesaid are kept or stored in the place after complaint has been made to him by any two or more of the seamen so lodged. No deduction from tonnage as aforesaid shall be made unless there is permanently cut in a beam and over the doorway of every such place the number of men it is allowed to accommodate with these words, "certified to accommodate

seamen."

Sec. 2.

Every place appropriated to the crew of a seagoing ves- Mar. 3, 1897. sel of the United States, except a fishing vessel, yacht, a pilot boat, and all vessels under two hundred tons register, Shall have a space of not less than seventy-two cubic feet and not less than twelve square feet measured on the deck or floor of that place for each seaman or apprentice lodged therein: Provided, That any such seagoing sailing vessel, built or rebuilt after June thirtieth, eighteen hundred and ninety-eight, shall have a space of not less than one hundred cubic feet and not less than sixteen square feet measured on the deck or floor of that space for each seaman or apprentice lodged therein. Such place shall be securely constructed, properly lighted, drained, heated and ventilated, properly protected from weather and sea, and, as far as practicable, properly shut off and protected from the effluvium of cargo or bilge water.

Fishing vessels, yachts, and pilot boats are hereby exempted from the provisions of section one of chapter one hundred and seventy-three of the laws of eighteen hundred and ninety-five, entitled "An Act to amend section one of chapter three hundred and ninety-eight of the laws of eighteen hundred and eighty-two, entitled 'An Act to provide for deductions from the gross tonnage of vessels of the United States,"" so far as said section prescribes the amount of space which shall be appropriated to the crew and provides that said space shall be kept free from goods. or stores not being the personal property of the crew in use during the voyage.

Mar. 2, 1895.

Mar. 2, 1895.

Every steamboat of the United States plying upon the Mississippi River or its tributaries shall furnish an appropriate place for the crew, which shall conform to the requirements of this section so far as they shall be applicable thereto by providing sleeping room in the engine room of the steamboats properly protected from the cold, winds, and rain by means of suitable awnings or screens on either side of the guards or sides and forward, reaching from the boiler deck to the lower or main deck, under the direction and approval of the Supervising Inspector-General of Steam Vessels, and shall be properly heated. Any failure to comply with this section shall subject the owner or owners to a penalty of five hundred dollars.

22. Deductions for other purposes.

(b) Any space exclusively for the use of the master certified by the collector to be reasonable in extent and properly constructed, and the words "Certified for the accommodation of master" to be permanently cut in a beam and over the door of such space.

(c) Any space used exclusively for the working of the helm, the capstan, and the anchor gear, or for keeping the charts, signals, and other instruments of navigation and boatswain's stores, and the words "Certified for steering gear," or "Certified for boatswain's stores," or "Certified chart house," as the case may be, to be permanently cut in the beam and over the doorway of each of such spaces.

(d) The space occupied by the donkey engine and boiler, if connected with the main pumps of the ship.

(e) In the case of a ship propelled wholly by sails any space, not exceeding two and one-half per centum of the gross tonnage, used exclusively for storage of sails: Provided, That spaces deducted shall be certified by the collector to be reasonable in extent and properly and efficiently constructed for the purposes for which they are intended, and the words "Certified for storage of sails" to be cut on the beam and over the doorway of such space. 23. Deductions for propelling power.

(f) In the case of a ship propelled by steam or other power requiring engine room, a deduction for the space occupied by the propelling power shall be made, as follows:

In ships propelled by paddle wheels in which the tonnage of the space occupied by and necessary for the proper working of the boilers and machinery is above twenty per centum and under thirty per centum of the gross tonnage, the deduction shall be thirty-seven per centum of the gross tonnage; and in ships propelled by screws in which the tonnage of the space is above thirteen per centum and under twenty per centum of the gross tonnage, the deduction shall be thirty-two per centum of the gross tonnage. In the case of screw steamers the contents of the trunk shaft shall be deemed spaces necessary for the proper working of the machinery.