The ZÖLLNER Bell Gong 500EL / 1+ system is an electro-mechanical device to fulfill the
requirements of the Colregs 1972, Rule 33(a) “…a vessel of 20 metres or more in length shall be
provided with a bell…, and a vessel of 100 metres in length shall, in addition, be provided with
a gong. …manual sounding … shall always be possible.”
The system consists of one electro-mechanical bell 350EL, one electro-mechanical gong 500ELand the control and connecting unit Signal Automaton 1+
– full compliance with the Colregs 1972
– type approved by all well known international maritime authorities, certificates by the classification societies on request
Sound characteristics
– true sound of bell and gong
– sound pressure level of 110 dB at 1 m distance
