Difference between revisions of "Diaphone"

From International Dictionary of Marine Aids to Navigation
Jump to navigation Jump to search
m (1 revision)
 
Line 2: Line 2:
'''3-2-115
'''3-2-115


A fog signal operating on the principle of periodic release of compressed air controlled by the reciprocating motion of a piston operated by compressed air.
equipment producing a characteristic sound using a reciprocating piston with vents operated by compressed air. Output can be in the form of two tones at different sound levels, the second tone being at a lower frequency. If there is only one tone, it ends in a suddenly lowered pitch known as a “grunt”. 


{{IALAFooter}}
{{IALAFooter}}

Latest revision as of 17:50, 7 February 2024

3-2-115

equipment producing a characteristic sound using a reciprocating piston with vents operated by compressed air. Output can be in the form of two tones at different sound levels, the second tone being at a lower frequency. If there is only one tone, it ends in a suddenly lowered pitch known as a “grunt”.




Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)