Image
Category
Maker
Object type
Place
Material
Date

Sounder - hollow lead cylinder with internal flaps

Massey's patent, frictionless ocean depth sounder

1836

"Sub Sig" echo sounder type 301/642 recorder

1954-1963

Piezoelectric Sounder: PVDF bimorph. Uses Kureha film

Original Neale sounder

Neale sounder with tubes

Telegraph sounder

direct reading polarised sounder and example of polarised polechanger

1920-1925

Sporton's improved form of Graham Bell's original sounder

Sir William Thomson's Triple Depth Gauge, one of two, 1880

1880

Sounder using 9 micron piezo film

Ebel sounder with stylograph

Morse sounder, 900 ohms, GPO No. 19161

Post Office sounder

Neale's sounder

Detaching claws and sinker weight for depth sounding, made by Carmelo Bonnici

1857

Hydra weight-detaching sounder for collecting small samples from the sea bottom, of the type designed by Mr Gibbs, Artificer aboard the sounding ship HMS Hydra, 1868, and used in sounding operations in the Atlantic and Indian Oceans. Hydra sounders were also employed by naturalists Charles Wyville Thomson, William Benjamin Carpenter and J Gwyn Jeffreys on HMS Porcupine in investigations of deep sea life in 1869.

Hydra weight-detaching sounder for collecting small samples from the sea bottom

1868

Detaching-weight sounder, possibly early form, designed by Ensign Brooke of the US Navy, USA, 1855-1860.

Detaching-weight sounder, or ‘Brooke’s Rod’, designed by Ensign Brooke

1855-1860

Weight-detaching mechanical sounder for gauging the depth of the sea floor and collecting sediment samples, designed by F. Skead and used on HMS Tartarus, 1857, during telegraph survey operations between Malta and Crete. The original had a 68 lb cannon ball as sinker weight; this object has a fibreglass replica.

Skead's detaching-weight sounder used for telegraph survey operations

1857

Vyle's direct reading polarised sounder

Vyle's direct reading polarised sounder

Hand lead and deep sea sounding machine

Hand lead and deep sea sounding machine