DRAUGHT INDICATOR

DRAUGHT INDICATORS.

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The same principle is applied to registering the draught of a ship.
Two balance chambers, one forward and one aft, are placed in a conven-
ient position against the ship's side below the level of the light load line,

GAUGES

Fig 12.

as in Figure 12, which assumes the ship to be non-existent. The mercury
rises and falls in the gauges whenever the draught increases or decreases
and, in Figure 12, the fore gauge is being operated by the head of watei
Hf, and the aft gauge by the head Ha.

DIMENSIONS
OF BALANCE
CHAMBER
& CASING
EXAGGERATED

COCK

Fig. 13.—Chamber of Draught Indicator.
A structural modification is required for the balance chamber,
as shown in the next Figure (13), where the balance chamber is contained