The use of explosives to aid in ditch excavation, such as for laying pipelines.
Related Terms |
RUST PREVENTION TEST
A test for determining the ability of an oil to aid in preventing the rusting of ferrous parts in the presence of water.
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INOPERATIVE
Said of a sound signal or radionavigation aid out of service due to a malfunction
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DAYBOARD
The daytime identifier of an aid to navigation presenting one of several standard shapes (square, triangle, rectangle) and colors (red, green, white, orange, yellow, or black).
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ARC OF VISIBILITY
The portion of the horizon over which a lighted aid to navigation is visible from seaward.
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ISOLATED DANGER BUOY
An IALA navigation aid marking a danger with clear water all around; it has a double ball topmark and is black with at least one red band. If lighted its characteristic is Fl(2).
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LANDMARK
A conspicuous artificial feature on land, other than an established aid to navigation, which can be used as an aid to navigation.
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SPOTTING TOP
A platform on a mast used to aid in gun laying.
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ISOLATED DANGER MARK (OR BUOY)
An IALA navigation aid marking a danger with clear water all around; it has a double ball topmark and is black with at least one red band. If lighted its characteristic is Fl(2).
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LATERAL MARK
A navigation aid intended to mark the sides of a channel or waterway
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AERONAUTICAL LIGHT
A luminous or lighted aid to navigation intended primarily for air navigation. Often shortened to AERO LIGHT.
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