DICTIONARY OF

Setting 303 Shaft Tube
Setting. Said of a heavenly body when it moves down to western horizon. 2. Setting a
course is putting ship's head in a desired direction. 3. Setting an observed object is
ascertaining its compass bearing.
Setting Pole. A quant. Long pole by which a craft is propelled by putting pole on bed of the
waterway, and bearing on it.
Settle. To ease a halyard, or other rope used for hoisting, by a small amount. 2. To cause the
land, or a light, to go below horizon by sailing away from it.
Settling Tank. Stokehold tank into which fuel oil is pumped and allowed to settle before
being used. Oil is drawn through a filter so that solid contents, usually sand, are left behind.
Set Up. To tauten standing rigging with lanyards, tackles, or screws.
Sewed. Said of a vessel when water level has fallen from the level at which she would float.
Also said of the water that has receded and caused a vessel to take the ground.
Sewn Boat. Boat made with a double skin of Honduras mahogany. Inside planking is at
right angles to keel, and is 5/32 -inch thick. Outer skin goes horizontally, and is ¼ -inch to
3/8 -inch thick. These two skins are sewed together with copper wire.
Sewing. Said of water level when it is falling away from a minimum height necessary to
float a particular vessel.
Sextant. Reflecting instrument used for measuring altitudes and other angles not exceeding
120°.
Shackle. Somewhat semi-circular bar of metal having an eye in each end to take a pin. Used
for connecting purposes. 2. Length of chain cable measuring 12 ½ fathoms in Royal Navy,
15 fathoms in Merchant Navy.
Shackle Bolt. Bolt having a shackle at its end.
Shackle Crow. Tool for withdrawing a bolt. Somewhat similar to a crowbar, but having a
shackle at toe.
Shackle Key. T-shaped key having a square section end. Used for unscrewing flush-headed
shackle pins that have a square countersunk recess in head.
Shades (of Sextant). Coloured glasses by which excessive light is excluded.
Shame. Lug that takes the pivot pin of a gooseneck.
Shaft. Propeller shafting. 2. That part of an oar that lies between blade and loom.
Shaft Alley. Footway alongside propeller shafting, extending from engine-room to stern
gland.
Shaft Coupling. Flange and bolt connection of two lengths of propeller shafting.
Shaft Pipe. Old name for 'Shaft Tube'. Especially applied to a tube in stern frame of wooden
vessel, through which shaft passes.
Shaft Tube. Circular casing through which propeller shaft passes to propeller.