Assumed Weight per Person

[unbusted67]

When inspecting a vessel the Coast Guard issues a COI or Certificate of Inspection which, among other things, sets is stone the capacity of a vessel This capacity is determined by, among other things, an assumed weight per person or AWPP.

I got a letter in the mail from the CG the other day saying that, because Americans are now fatter than they were when they started inspecting small passenger boats, our capacity will be reduced. I am to determine how much the capacity will be reduced by a simple ratio formula. The new AWPP for Americans is now 185 (which still seems on the light side if you ask me) The problem is that they didn't tell me what the AWPP was when they first issued the COI. Does anyone know what that number is?

[amarinesurveyor]

It was 160 llbs. per person.
Brian

[nigel1]

Found this for you,
Quote:
Section 178.330 of Title 46 of the CFR
currently specifies that the AAWPP is
160 pounds, except that vessels
operating exclusively on protected
waters and carrying a mix of men,
women, and children may use an
AAWPP of 140 pounds per person.
Section 171.080 uses a weight of 75
kilograms (165 pounds) per person for
damage stability calculations. These
weights were established in the 1960s,
and have not been updated since.
Unquote
This came from
http://edocket.access.gpo.gov/2010/pdf/2010-30391.pdf

SOLAS criteria suggest that the weight of the average seafarer is 75 kg (12 stone, 168 lb), but that is likely to change soon

[Minggat]

Originally Posted by unbusted67

I got a letter in the mail from the CG the other day saying that, because Americans are now fatter than they were when they started inspecting small passenger boats, our capacity will be reduced.

So if they can't get a pond of flesh out of you, they find a way to penalize you for it.

[S/V Alchemy]

Pond of flesh, indeed. Could describe the ARC.

[boasun]

I'll have you know that the Doctor's Scales lied!! Big time by 30 pounds.

[delmarrey]

I don't know what boat you have so I'll include the whole thing. Notice the word "or".

Subpart B—Display of Capacity Information
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§ 183.21 Applicability.
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This subpart applies to monohull boats less than 20 feet in length, except sailboats, canoes, kayaks, and inflatable boats.
§ 183.23 Capacity marking required.
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Each boat must be marked in the manner prescribed in §§183.25 and 183.27 with the maximum persons capacity in whole numbers of persons and in pounds, the maximum weight capacity in pounds, determined under §§183.33 through 183.43, and the maximum horsepower capacity determined under §183.53 or the statement “This Boat Not Rated for Propulsion by a Motor”.
[CGD 78–034, 45 FR 2029, Jan. 10, 1980, as amended by USCG–1999–5832, 64 FR 34716, June 29, 1999]
§ 183.25 Display of markings.
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(a) Each marking required by §183.23 must be permanently displayed in a legible manner where it is clearly visible to the operator when getting the boat underway.
(b) The information required by §183.23 must be displayed in the following manner:
(1) For outboard boats:
U.S. Coast Guard Maximum Capacities
XX Persons or XXX Pounds
XXX Pounds, persons, motor, gear
XXX Horsepower, motor
or
U.S. Coast Guard Maximum Capacities
XX Persons or XXX Pounds
XXX Pounds, persons, motor, gear
XXX Horsepower, motor with remote steering
XXX Horsepower, motor without remote steering
(2) For inboard boats and inboard-outboard boats:
U.S. Coast Guard Maximum Capacities
XX Persons or XXX Pounds
XXX Pounds, persons, gear
(3) For boats rated for motors of 2 horsepower or less:
U.S. Coast Guard Maximum Capacities
XX Persons or XXX Pounds
XXX Pounds, persons, motor, gear
XXX Horsepower, motor
(4) For boats rated for manual propulsion:
U.S. Coast Guard Maximum Capacities
XX Persons or XXX Pounds
XXX Pounds, persons, gear
This Boat Not Rated for Propulsion by Motor
(c) The capacity information displays required in paragraph (b) must meet the following as illustrated in Figure 183.25:

View or download PDF
(1) The capacity information required in §183.23 must be displayed within a yellow area that—
(i) Is at least 4 inches wide; and
(ii) Is high enough that each line of print is separated by at least 1/8 inch from each other and from the borders of the yellow area;
(2) The persons capacity in whole numbers must be black print with the following dimensions:
(i) The height must not be smaller than one-half inch;
(ii) The width of the numbers must be three-fifths of the height except for the number “4”, which shall be one stroke width wider, and the number “1”, which shall be one stroke in width;
(iii) The stroke width shall be one-sixth of the height; and
(iv) The minimum space between the numbers shall be one stroke width.
(3) The words in the line “XX Persons or XXX Pounds” must be at least one-quarter inch in height but not larger than one-half the height of the persons capacity number and of a color contrasting with yellow. The number of pounds in this line must be at least one-eighth inch in height but no larger than one-half the height of the persons capacity number and of a color contrasting with yellow.
(4) All remaining words and numbers required to be within the yellow area required in paragraph (c)(1) must be at least one-eighth inch in height, but no larger than one-half the height of the persons capacity number.
(5) All other words and numbers on the displays must be located outside the yellow area on a background color which contrasts with yellow.
(6) The words “Maximum Capacities” must be at least one-quarter inch in height and of color contrasting with its background.
(7) The words “U.S. Coast Guard” must be at least one-eighth inch in height and of color contrasting with its background.
[CGD 78–034, 45 FR 2029, Jan. 10, 1980]
§ 183.27 Construction of markings.
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Each marking required by §183.23 must be—
(a) Capable of withstanding the combined effects of exposure to water, oil, salt spray, direct sunlight, heat, cold, and wear expected in normal operation of the boat, without loss of legibility; and
(b) Resistant to efforts to remove or alter the information without leaving some obvious sign of such efforts.
[CGD 78–034, 45 FR 2030, Jan. 10, 1980]
Subpart C—Safe Loading
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§ 183.31 Applicability.
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This subpart applies to monohull boats less than 20 feet in length except sailboats, canoes, kayaks, and inflatable boats.
§ 183.33 Maximum weight capacity: Inboard and inboard-outdrive boats.
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(a) The maximum weight capacity (W) marked on a boat that has one or more inboard or inboard-outdrive units for propulsion must not exceed the greater value of W obtained from either of the following formulas:

(b) For the purposes of paragraph (a) of this section:
(1) “Maximum displacement” is the weight of the volume of water displaced by the boat at its maximum level immersion in calm water without water coming aboard. For the purpose of this paragraph, a boat is level when it is transversely level and when either of the two following conditions are met:
(i) The forward point where the sheer intersects the vertical centerline plane and the aft point where the sheer intersects the upper boundary of the transom (stern) are equidistant above the water surface or are equidistant below the water surface.
(ii) The most forward point of the boat is level with or above the lowest point of water ingress.
(2) “Boat weight” is the combination of:
(i) Hull weight;
(ii) Deck and superstructure weight;
(iii) Weight of permanent appurtenances; and
(iv) Weight of full permanent fuel tanks.
(3) “Machinery weight” is the combined weight of installed engines or motors, control equipment, drive units, and batteries.
[CGD 72–61R, 37 FR 15782, Aug. 4, 1972]
Editorial Note: For Federal Register citations affecting §183.33, see the List of CFR Sections Affected, which appears in the Finding Aids section of the printed volume and on GPO Access.
§ 183.35 Maximum weight capacity: Outboard boats.
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(a) The maximum weight capacity marked on a boat that is designed or intended to use one or more outboard motors for propulsion must be a number that does not exceed one-fifth of the difference between its maximum displacement and boat weight.
(b) For the purposes of paragraph (a) of this section:
(1) “Maximum displacement” is the weight of the volume of water displaced by the boat at its maximum level immersion in calm water without water coming aboard except for water coming through one opening in the motor well with its greatest dimension not over 3 inches for outboard motor controls or fuel lines. For the purpose of this paragraph, a boat is level when it is transversely level and when either of the two following conditions are met:
(i) The forward point where the sheer intersects the vertical centerline plane and the aft point where the sheer intersects the upper boundary of the transom (stern) are equidistant above the water surface or are equidistant below the water surface.
(ii) The most forward point of the boat is level with or above the lowest point of water ingress.
(2) “Boat weight” is the combination of:
(i) Hull weight;
(ii) Deck and superstructure weight;
(iii) Weight of permanent appurtenances; and
(iv) Weight of full permanent fuel tanks.
[CGD 72–61, 37 FR 15782, Aug. 4, 1972, as amended by CGD 73–250, 40 FR 43857, Sept. 23, 1975; CGD 75–176, 42 FR 2681, Jan. 13, 1977; USCG–1999–5832, 64 FR 34716, June 29, 1999]
§ 183.37 Maximum weight capacity: Boats rated for manual propulsion and boats rated for outboard motors of 2 horsepower or less.
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(a) The maximum weight capacity marked on a boat that is rated for manual propulsion or for motors of 2 horsepower or less must not exceed 3/10 of the difference between the boat's maximum displacement and the boat's weight in pounds.
(b) For the purposes of paragraph (a) of this section:
(1) “Maximum displacement” is the weight of the volume of water displaced by the boat at its maximum level immersion in calm water without water coming aboard. For the purpose of this paragraph, a boat is level when it is transversely level and when either of the two following conditions are met:
(i) The forward point where the sheer intersects the vertical centerline plane and the aft point where the sheer intersects the upper boundary of the transom (stern) are equidistant above the water surface or are equidistant below the water surface.
(ii) The most forward point of the boat is level with or above the lowest point of water ingress.
(2) “Boat weight” is the combination of:
(i) Hull weight;
(ii) Deck and superstructure weight; and
(iii) Weight of permanent appurtenances.
[CGD 72–61R, 37 FR 15782, Aug. 4, 1972]
Editorial Note: For Federal Register citations affecting §183.37, see the List of CFR Sections Affected, which appears in the Finding Aids section of the printed volume and on GPO Access.
§ 183.39 Persons capacity: Inboard and inboard-outdrive boats.
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(a) The persons capacity in pounds marked on a boat that is designed to use one or more inboard engines or inboard-outdrive units for propulsion must not exceed the lesser of:
(1) The maximum weight capacity determined under §183.33 for the boat; or
(2) For boats with a maximum persons capacity less than 550 pounds, the maximum persons capacity determined in the following manner:
(i) Float the boat in calm water with all its permanent appurtenances, including installed engines, full fuel system and tanks, control equipment, drive units and batteries.
(ii) Gradually add weights along one outboard extremity of each passenger carrying area, at the height of the seat nearest the center of that area, but no higher than the height of the gunwale and distributed equally forward and aft of that center in a plane parallel to the floorboards, until the boat assumes the maximum list or trim or both, without water coming aboard.
(iii) Compute the persons capacity in pounds in the following formula: Persons capacity=A/0.6 where A is the total of the weights added in paragraph (a)(2)(ii) of this section.
(b) The maximum persons capacity in whole numbers of persons marked on a boat that is designed or intended to use one or more inboard engines or inboard-outboard units must not exceed the value obtained by adding 32 pounds to the value determined in paragraph (a)(2)(iii), dividing the sum by 141 and rounding off the result to the nearest whole number. If the fraction is less than one-half, round down to the next whole integer and if the fraction is equal to or greater than one-half, round up to the next higher whole integer.
[CGD 78–034, 45 FR 2030, Jan. 10, 1980, as amended by CGD 83–012, 49 FR 39328, Oct. 5, 1984; 50 FR 18636, May 2, 1985]
§ 183.41 Persons capacity: Outboard boats.
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(a) The persons capacity in pounds marked on a boat that is designed to use one or more outboard motors for propulsion must not exceed the lesser of:
(1) The maximum weight capacity determined under §183.35 for the boat minus the motor and control weight, battery weight (dry), and full portable fuel tank weight from Table 4 of Subpart H of this part; or
(2) For boats with a maximum persons capacity less than 550 pounds, the maximum persons capacity determined in the following manner:
(i) Float the boat with all its permanent appurtenances.
(ii) Add, in normal operating positions, the dry motor and control weight, battery weight, and full portable fuel tank weight, if any, shown in Table 4 of Subpart H of this part for the maximum horsepower capacity marked on the boat. Permanently installed fuel tanks shall be full of fuel.
(iii) Gradually add weights along one outboard extremity of each passenger carrying area, at the height of the seat nearest the center of that area, but no higher than the height of the gunwale, and distributed equally forward and aft of that center in a plane parallel to the floorboards until the boat assumes the maximum list or trim, or both without water coming aboard.
(iv) Compute the persons capacity in pounds using the following formula: Persons capacity=A/0.6 where A is the total of the weights added in paragraph (a)(2)(iii) of this section.
(b) The maximum persons capacity in whole numbers of persons marked on a boat designed or intended to use one or more outboard motors for propulsion must not exceed the value obtained by adding 32 pounds to the lesser of the values determined in paragraph (a)(1) or (a)(2)(iv), dividing the sum by 141, and rounding off the result to the nearest whole number. If the fraction is less than one-half, round down to the next lower whole integer and if the fraction is equal to or greater than one-half, round up to the next higher whole integer.
[CGD 78–034, 45 FR 2030, Jan. 10, 1980, as amended by CGD 83–012, 49 FR 39328, Oct. 5, 1984; 50 FR 18636, May 2, 1985]

§ 183.43 Persons capacity: Boats rated for manual propulsion and boats rated for outboard motors of 2 horsepower or less.
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(a) The persons capacity in pounds marked on a boat that is rated for manual propulsion or for motors of 2 horsepower or less must not exceed:
(1) For boats rated for manual propulsion, 90 percent of the maximum weight capacity in pounds; and
(2) For boats rated for motors of 2 horsepower or less, 90 percent of the maximum weight capacity in pounds, less 25 pounds.
(b) The maximum persons capacity, in whole numbers of persons marked on a boat that is rated for manual propulsion must not exceed the value obtained by adding 32 pounds to the value determined in paragraph (a)(1), dividing the sum by 141, and rounding off the result to the nearest whole number. If the fraction is less than one-half, round down to the next lower integer and if the fraction is equal to or greater than one-half, round up to the next higher whole integer.
(c) The maximum persons capacity in whole numbers of persons marked on a boat rated for motors of 2 horsepower or less must not exceed the value obtained by adding 32 pounds to the value determined in paragraph (a)(2), dividing the sum by 141, and rounding off the result to the nearest whole number. If the fraction is less than one-half, round down to the next lower whole integer and if the fraction is equal to or greater than one-half, round up to the next higher whole integer.
[CGD 78–034, 45 FR 2031, Jan. 10, 1980]