Deck/Nautical Equipment/372571 ECHO SOUNDING DEVICE

For ships constructed before May 25, 1980, weighing greater than 1,600 gross tons and for ships constructed after May 25, 1980, weighing greater than 500 gross tons.  All vessels falling under this classification which sail international routes must be fitted with an echo sounding device.  Electrically operated instrument that emits a sound from vessel’s submerged surface and then measures and records the time interval which passes before the echo returns.  The most popular model is shown here.  Please ask for further information and brochures of various models available from local manufacturers when required.

1980年5月25日之前建造的1600总吨以上的船舶和1980年5月25日以后建造的500总吨以上的船舶。所有航行国际航线的属于这一类别的船只都必须安装回声探测仪。一种电动仪器，从船的水下表面发出声音，然后测量并记录回声返回前经过的时间间隔。这里展示的是最受欢迎的款式。如有需要，请向本地制造商索取各种型号的进一步资料及小册子。