Figure 21. Silvertown Company sounder, a device very similar to the Belknap- Sigsbee sounder with one important difference. This sounder had a unique ballast release method which involved a knife cutting the line holding the ballast upon beginning of ascent. This device was used in cable laying surveys.
Photo Category: Oceanography - Historical instruments
|462 x 640||31.02 KB|
|924 x 1280||117.99 KB|
|1586 x 2199||302.21 KB|
|Added On||18th October 2015|