Coast Guard, DOT § 183.43

(b) The maximum persons capacity in total of the weights added in paragraph whole numbers of persons marked on a (a)(2)(iii) of this section. that is designed or intended to use (b) The maximum persons capacity in one or more inboard or in- whole numbers of persons marked on a board-outboard units must not exceed boat designed or intended to use one or the value obtained by adding 32 pounds more outboard motors for propulsion to the value determined in paragraph must not exceed the value obtained by (a)(2)(iii), dividing the sum by 141 and adding 32 pounds to the lesser of the rounding off the result to the nearest values determined in paragraph (a)(1) whole number. If the fraction is less or (a)(2)(iv), dividing the sum by 141, than one-half, round down to the next and rounding off the result to the near- whole integer and if the fraction is est whole number. If the fraction is less equal to or greater than one-half, than one-half, round down to the next round up to the next higher whole inte- lower whole integer and if the fraction ger. is equal to or greater than one-half, [CGD 78–034, 45 FR 2030, Jan. 10, 1980, as round up to the next higher whole inte- amended by CGD 83–012, 49 FR 39328, Oct. 5, ger. 1984; 50 FR 18636, May 2, 1985] [CGD 78–034, 45 FR 2030, Jan. 10, 1980, as amended by CGD 83–012, 49 FR 39328, Oct. 5, § 183.41 Persons capacity: Outboard 1984; 50 FR 18636, May 2, 1985] . (a) The persons capacity in pounds § 183.43 Persons capacity: Boats rated marked on a boat that is designed to for manual propulsion and boats use one or more outboard motors for rated for outboard motors of 2 propulsion must not exceed the lesser or less. of: (a) The persons capacity in pounds (1) The maximum weight capacity de- marked on a boat that is rated for termined under § 183.35 for the boat manual propulsion or for motors of 2 minus the motor and control weight, horsepower or less must not exceed: battery weight (dry), and full portable (1) For boats rated for manual pro- fuel tank weight from Table 4 of Sub- pulsion, 90 percent of the maximum part H of this part; or weight capacity in pounds; and (2) For boats with a maximum per- (2) For boats rated for motors of 2 sons capacity less than 550 pounds, the horsepower or less, 90 percent of the maximum persons capacity determined maximum weight capacity in pounds, in the following manner: less 25 pounds. (i) Float the boat with all its perma- (b) The maximum persons capacity, nent appurtenances. in whole numbers of persons marked on (ii) Add, in normal operating posi- a boat that is rated for manual propul- tions, the dry motor and control sion must not exceed the value ob- weight, battery weight, and full port- tained by adding 32 pounds to the value able fuel tank weight, if any, shown in determined in paragraph (a)(1), divid- Table 4 of Subpart H of this part for ing the sum by 141, and rounding off the maximum horsepower capacity the result to the nearest whole num- marked on the boat. Permanently in- ber. If the fraction is less than one- stalled fuel tanks shall be full of fuel. half, round down to the next lower in- (iii) Gradually add weights along one teger and if the fraction is equal to or outboard extremity of each passenger greater than one-half, round up to the carrying area, at the height of the seat next higher whole integer. nearest the center of that area, but no (c) The maximum persons capacity in higher than the height of the gunwale, whole numbers of persons marked on a and distributed equally forward and aft boat rated for motors of 2 horsepower of that center in a plane parallel to the or less must not exceed the value ob- floorboards until the boat assumes the tained by adding 32 pounds to the value maximum list or trim, or both without determined in paragraph (a)(2), divid- water coming aboard. ing the sum by 141, and rounding off (iv) Compute the persons capacity in the result to the nearest whole num- pounds using the following formula: ber. If the fraction is less than one- Persons capacity=A/0.6 where A is the half, round down to the next lower

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whole integer and if the fraction is method discussed in paragraph (b) of equal to or greater than one-half, this section. round up to the next higher whole inte- (a) The maximum horsepower capac- ger. ity must be computed as follows: (1) Compute a factor by multiplying [CGD 78–034, 45 FR 2031, Jan. 10, 1980] the boat length in feet by the max- imum transom width in feet excluding Subpart D—Safe Powering handles and other similar fittings, at- tachments, and extensions. If the boat § 183.51 Applicability. does not have a full transom, the tran- This subpart applies to monohull som width is the broadest beam in the boats less than 20 feet in length, except aftermost quarter length of the boat. sailboats, , kayaks, and inflat- (2) Locate horsepower capacity cor- able boats, that are designed or in- responding to the factor in Table 183.53. tended to use one or more outboard (3) For a boat with a factor over 52.5, motors for propulsion. if the horsepower capacity calculated in Table 183.53 is not an exact multiple § 183.53 Horsepower capacity. of 5, it may be raised to the next exact The maximum horsepower capacity multiple of 5. marked on a boat must not exceed the (4) For flat bottom hard chine boats horsepower capacity determined by the with a factor of 52 or less, the horse- computation method discussed in para- power capacity must be reduced by one graph (a) of this section, or for certain horsepower capacity increment in qualifying boats, the performance test Table 183.53.

TABLE 183.53—OUTBOARD BOAT HORSEPOWER CAPACITY [Compute: Factor=Boat Length X Transom Width] If factor (nearest integer) is ...... 0Ð35 36Ð39 40Ð42 43Ð45 46Ð52

Horsepower Capacity is ...... 3 5 7.5 10 15

[Note: For flat bottom hard chine boats, with factor of 52 or less, reduce one capacity limit (e.g. 5 to 3)]

No remote , or less than 20″ transom height Remote steering and at If factor is over 52.5 and the boat has least 20″ transom height For flat bottom hard chine boats For other boats

Horsepower capacity is (raise to near- (2 X Factor) ¥90 ...... (0.5 X Factor) ¥15 ...... (0.8 X Factor) ¥25 est multiple of 5).

(b) For boats qualifying under this and tested with the highest horsepower paragraph, the performance test meth- production powerplant for which the od described in this paragraph may be boat is to be rated, not to exceed 40 used to determine the horsepower ca- horsepower. pacity. (ii) Standard equipment must be in- (1) Qualifying criteria. stalled in accordance with manufactur- (i) Thirteen feet or less in length; ers’ instructions. (ii) Remote wheel steering; (iii) The lowest ratio (quickest) (iii) Transom height steering system offered on the boat (A) Minimum 19 inch transom height; model being tested must be installed. or, (iv) The outboard motor must be (B) For boats with at least a 19 inch motorwell height, a minimum 15 inch fitted with the manufacturer’s rec- transom height; ommended providing max- imum speed. (iv) Maximum persons capacity not over two persons; (v) Standard permanently installed (2) Boat preparation. fuel tanks must be no more than one- (i) The boat must be rigged with half full. Boats without permanent equipment recommended or provided tanks must be tested with one full by the boat and motor manufacturer portable tank.

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