2. Translate the following sentences paying attention to different meanings of «one», «that» («those»), «these»:

1. Those 4 stations will provide navigation coverage to an area of more than

one-fourth of the world.

2. The lowest frequency and the one most generally used in OMEGA is 10.2

kilohertz.

3. OMEGA provides continuous information, accurate to one mile during the day

time and two miles at night.

4. OMEGA will be evaluated together with other existing navigation systems as

well as those in an advanced state of development.

5. OMEGA consists of eight transmitters strategically located around the world.

Four of these are already in operation.

3. Translate the following attributive complex:

Navy-developed OMEGA navigation system, to provide navigation coverage, an all-weather, general purpose navigational aid, to provide continuous world-wide position information.

4. Answer the following questions:

1. What is «OMEGA»? What does it consist of?

2. Where are its 4 stations located?

3. Does OMEGA provide navigation for aircraft, ships and submerged

submarines in any weather?

4. On what kilohertzes do the stations transmit signals?

5. What is the lowest frequency of OMEGA?

6. How accurate is OMEGA during the daytime and at night?

7. Does the Department of Defence participate in the development of OMEGA

plan?

5. Match words with their meanings: 1)spacecraft a)any of the huge groups of stars in outer space 2)course b)series of events taking place in an order

3)galaxy c)forward movement in space or time

4)orbit d)path followed by a heavenly body round another body 5)cycle e)body seen in the sky at night as a distant point of light 6)star f)apparatus used for travel beyond the Earth s atmosphere

6. Text for additional reading:

1) OMEGA had its origin more than 25 years ago when the US Naval Research Laboratory started using long range, very Low frequency radio waves. As two years of tests provided its efficiency and accuracy, the US Navy ordered OMEGA receiver sets to equip surface and underwater craft.

OMEGA radio receivers are already installed aboard some of the commercial ocean-going ships. Some day all large ocean-going ships of merchant fleet may be using the system. In the next 20 years, about 60.000 OMEGA receivers are expected to be in use throughout the world.

2) OMEGA is a very long-range, very low frequency (VLF) radio navigation system which will provide global coverage for ships and aircraft. Global coverage will be obtained in the 197G's with eight transmitting stations; four stations are presently operational although not in final configuration or at design power. In marine navigation, OMEGA normally is used as a single frequency hyperbolic system although several frequencies are available and the system can be used in the range-range mode.

The present stations have been in essentially continuous 24-hour operation for over four years. Over 500 receivers have been constructed of which .about half have been sold commercially. The Navy is installing OMEGA on all ships capable of independent operation except some. Plans have also been made to install OMEGA on Navy aircraft. Some fishing boats and merchantmen are now OMEGA equipped. As Mr. Jones observed at a recent meeting of the British Institution of Navigation, «...OMEGA is already the most widely deployed ground-based navigation aid in the world».