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, lowered into the sea to bring up a sample of sea-water from a desired depth.
Apparatus for dropping
a line and sinker to sea-bed
the amount of line out
, heaving in the sinker and indicating the actual depth of water.
Tube leading from a deck to any place or compartment containing water or liquid. Forms
a lead for a graduated rod
, to which is attached a line.
attached to a line
, used for measuring depth of liquid in a space.
Any signal transmitted by a system of sounds.
Point or direction opposite to North. For a heavenly body to 'South' is for it to come to the meridian south of observer.
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