604 NICHOLLS'S SEAMANSHIP AND NAUTICAL KNOWLEDGE

Jjig. lO.—A hatch coaming as sometimes fitted in small vessels
with 'large cargo hatch openings.

A

Fig 10.—Hatch Coaming.
A—Wooden hatch cover resting on ledge B and on wood fore-

and-af ter <7, which in turn rests on the portable hatch beam D.
E—Stiffening angles on lower and upper edge of hatch beam.
F—Angle connecting coaming to deck plating.
$—Stanchion connected to coaming and to deck plating by lug

pieces to give support to coaming.
H—Bulwark stanchion.
J—Large bracket to contribute compensation for loss of strength

due to cutting beams in way of wide hatchway.

Strifm Box.—Fig. 11 shows a strum box enclosing a bilge suction

Fig 11 —Strum Box.