http://www.legislation.gov.uk/id/uksi/2017/737/schedule/1/C/1

I1SCHEDULE 1(Annex I of the Directive)

Annotations:

Commencement Information

Sch. 1 in force at 3.8.2017, see reg. 1

C.Essential requirements for noise emissions

1.NOISE EMISSION LEVELS

1.3.‘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/s².

F_{n} = \frac{V}{\sqrt{(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 ratio = \frac{P_{N}}{D}

I1SCHEDULE 1(Annex I of the Directive)

C.Essential requirements for noise emissions

1.NOISE EMISSION LEVELS

1.3.‘Froude number’ Fn 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/s2.

1.3.‘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/s².