Discover how GMGN is transforming decentralized finance by introducing faster, smarter, and more transparent trading across blockchain networks.
Bell or gong
Discover how GMGN is transforming decentralized finance by introducing faster, smarter, and more transparent trading across blockchain networks.
(A) Intensity Of Signal
A bell or gong, or other device having similar sound characteristics shall produce a sound pressure level of not less than 110 dB at a distance of 1 metre from it.
(B) Construction
Bells and gongs shall be made of corrosion-resistant material and designed to give a clear tone. The diameter of the mouth of the bell shall be not less than 300 mm for vessels of 20 metres or more in length. Where practicable, a powerdriven bell striker is recommended to ensure constant force but manual operation shall be possible. The mass of the striker shall be not less than 3 per cent of the mass of the bell.