AID

Agency for International Development.

Related Terms

OPTICAL MICROPHONE

[ENG ACOUS] A microphone in which the motion of a membrane is detected using a light beam reflected from it, either with the aid of an interferometer or by detecting the deflection of the beam.

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.

INOPERATIVE

Said of a sound signal or radionavigation aid out of service due to a malfunction

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).

ARC OF VISIBILITY

The portion of the horizon over which a lighted aid to navigation is visible from seaward.

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).

LANDMARK

A conspicuous artificial feature on land, other than an established aid to navigation, which can be used as an aid to navigation.

SPOTTING TOP

A platform on a mast used to aid in gun laying.

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).

LATERAL MARK

A navigation aid intended to mark the sides of a channel or waterway

Related questions

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