C. Essential requirements for noise emissions

Recreational craft with inboard or stern drive engines without integral exhaust, personal watercraft and outboard engines and stern drive engines with integral exhaust shall comply with the essential requirements for noise emissions set out in this Part. Recreational craft with inboard or stern drive engines without integral exhaust, personal watercraft and outboard engines and stern drive engines with integral exhaust shall be designed, constructed and assembled so that noise emissions shall not exceed the limit values in the following table: Rated Engine Power (single engine) In kW Maximum Sound Pressure Level = L_(pASmax) In dB P_(N) 10 67 10 P_(N) 40 72 P_(N) 40 75 where P_(N) = rated engine power in kW of a single engine at rated speed and L_(pASmax) = maximum sound pressure level in dB. For twin-engine and multiple-engine units of all engine types an allowance of 3 dB may be applied. As an alternative to sound measurement tests, recreational craft with inboard engine configuration or stern drive engine configuration, without integral exhaust, shall be deemed to comply with the noise requirements set out in point 1.1 if they have a Froude number of ≤ 1,1 and a Power to Displacement ratio of ≤ 40 and where the engine and exhaust system are installed in accordance with the engine manufacturer’s specifications. ‘Froude number’ F_(n) shall be calculated by dividing the maximum recreational craft speed V (m/s) by the square root of the waterline length lwl (m) multiplied by a given gravitational acceleration constant, g, of 9,8 m/s^(2). F_(n)V(g. lwl) ‘Power to Displacement ratio’ shall be calculated by dividing the rated engine power P_(N) (in kW) by the recreational craft’s displacement D (in tonnes) Power to Displacement ratioP_(N)D For recreational craft with inboard engine or stern drive engines without integral exhaust and personal watercraft, the owner’s manual required under point 2.5 of Part A, shall include information necessary to maintain the recreational craft and exhaust system in a condition that, insofar as is practicable, will ensure compliance with the specified noise limit values when in normal use. For outboard engines and stern drive engines with integral exhaust, the owner’s manual required under Section 4 of Part B shall provide the instructions necessary to maintain the engine in a condition, that insofar as is practicable, will ensure compliance with the specified noise limit values when in normal use. The provisions on the durability in Section 3 of Part B shall apply mutatis mutandis to the compliance with the requirements on noise emissions set out in Section 1 of this part.

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Source: EUR-Lex (Cellar) · retrieved 2026-11-05 · Text as adopted (Official Journal); later amendments are not incorporated in this text.