Approach


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approach

[ə′prōch]
(mechanical engineering)
The difference between the temperature of the water leaving a cooling tower and the wet-bulb temperature of the surrounding air.
(navigation)
In air operations, a maneuver executed by an aircraft in making its transit from high-altitude enroute flight to the point where it begins the landing approach; includes maneuvers (such as flying race-track pattern) required for traffic control.

Approach

 

in space navigation, a series of consecutive maneuvers by which one spacecraft is brought into close proximity to another. The aim of approach may be inspection, mooring, or assembly in orbit. Inspection, for example, entails the examination of a spacecraft at close range in order to determine the necessity of repairs. Mooring involves the temporary linking of two spacecraft with a flexible line.

Approach may be accomplished in two ways. In one technique only the final distance separating the two spacecraft is critical, and the closing speed at the moment of closest approach is not a factor. In the second technique the closing speed up to the moment of closest approach should be very low, ideally zero. This second technique requires larger expenditures of fuel than the first.

Approach requires that the two spacecraft be equipped with radio communications systems, computers, rocket engines, and navigation control systems. The active spacecraft carries out the search, maneuvering, and approach missions, while the second one is passive.

The first approach of two spacecraft with crew participation was carried out by the American spacecraft Gemini 6 and Gemini 7 in 1965. The first approach of three spacecraft with crew participation was carried out by the Soviet spacecraft Soyuz 6, Soyuz 7, and Soyuz 8 in 1969.

approach

That part of an aircraft flight path from the end of the en route phase of the flight to touchdown.

Approach

A relational database that is part of Lotus SmartSuite. It provides the ability to graphically create Windows applications using industry standard database formats, such as dBASE and Paradox. It includes macros and the ability to attach programming statements to data, providing a way to automate many kinds of applications. See Lotus SmartSuite.
References in classic literature ?
I have always thought, that one of the most curious and valuable objects of antiquaries has been to trace the progress of society, by the efforts made in early ages to improve the rudeness of their first expedients, until they either approach excellence, or, as is more frequently the case, are supplied by new and fundamental discoveries, which supersede both the earlier and ruder system, and the improvements which have been ingrafted upon it.
The sounds we heard were the squealing of thoats and the grumbling of zitidars, with the occasional clank of arms which announced the approach of a body of warriors.
If I can only approach within four harpoons' length of it
When there is dust rising in a high column, it is the sign of chariots advancing; when the dust is low, but spread over a wide area, it betokens the approach of infantry.
At last they suffered us to approach so near to them that we were enabled to throw the cotton cloth across their shoulders, giving them to understand that it was theirs, and by a variety of gestures endeavouring to make them understand that we entertained the highest possible regard for them.
repeated the captain; and he beckoned her to approach.
War had been declared by Thuvan Dihn, but the messenger who had been dispatched with the proclamation had been a Dusarian who had seen to it that no word of warning reached the twin cities of the approach of a hostile fleet.
For a moment he was puzzled; but presently came to the conclusion that Werper had been frightened by the approach of the lion, and had sneaked off in terror.
It was his nose that first discovered the approach of Sabor, the lioness, when the wind shifted for a moment.
It was the nearest approach to a friendly advance that Tarzan could make in the language of Sheeta.
Waiting there he heard the party approach the building, he heard someone at the entrance to his hiding place, and then he heard the door past which he had come slam to.
The god had no club, so he suffered him to approach quite near.