XL(44”/112cm)

Earliest examples date from around 200BC

The green sectors represent silence periods on the SSB (Single Side Band)) distress frequency of 2182kHz

white and yellow are used because these are the only colours that can be readily distinguished at sea

EcoBlast Foghorn FATHERSDAYGIFTS XL(44”/112cm)The Foghorn That Never Runs Out. Besides being louder than most of its competitors, EcoBlast is powered entirely by compressed air, meaning that it never needs refills and is 100% environmentally friendly. The cylinder can be recharged either by using the mini hand pump supplied, or a tyre inflation compressor. 8" tall, horn length 6. 5".