Tanks used for the storage of air discharged from compressors. They serve also to damp discharge line pulsations.

Carries supplies to drilling units or installations during field de-velopment or production.

A device designed to remove solids, such as dirt, scale, rust and other contaminants from the air system.

Differences between the compass reading and an actual magnetic direction caused by magnetic forces in the vicinity of the compass, which are usually the result of masses of metal, speaker magnets, etc. (2) Vessel departure from specified voyage course.

For ships, a cargo handling area parallel to the shoreline where a vessel normally ties up.- For land transportation, a loading or unloading platform at an industrial location or carrier terminal.

Old sailing ship term for taking a nap.

The outside plating of a vessel.

Short shrouds which give support to the top of a lower mast.

Small stuff seized across a hook to prevent it from unshipping (once hooked, mousing keeps the hook on).

A light spar set fore and aft on a boat, serving as a spread for the boat cover.

Is a unit of work equal to 33,000 foot pounds per minute, 550 foot pounds per second, or 746 Watts.

A concrete foundation with lateral supports which rests upon a number of steel springs. Designed to deal with disturbing frequencies in vibration isolation

A control line that adjusts tension along the foot of the sail, pulling the clew away from the tack; used to maintain proper sail shape.

A course marked by buoys or ranges measuring one nautical mile. Measured miles are used to calibrate logs.

(1) Generic name for a large sea-going vessel. (2) To take an object aboard, such as cargo, or water. (3) To put items such as oars on the boat when not in use.

Pieces of hard wood bolted to the outer end of a bowsprit through which are rove the foretopmast stays before they are brought in to the bows and secured.

The shape of the fore-body of a ship as it thrusts through the sea. A vessel with a slim bow is said to have a fine entry.

In navigation, the smaller angle at which two position lines on a chart intersect. The fix will be more reliable as the angle approaches 90

(1) When two or more boats tie up alongside each other. (2) Overlapping of edges of two ice-floes, so that one floe is partly supported by the other.

Short period oscillation in level of enclosed, or partly enclosed, area of water when not due to the action of tide-raising forces.