Lesson 2. System of advanced navigation

1. Read the following words:

call	era	quality
more	such	sense
store	sub	senses
course	submarine	sensitive
law	under	sensitivity
brought	ultra	navigate
accelerometer	emanation	navigable
acceleration	inertial
altitude	infra-red

Grammar. Сложноподчиненные предложения с придаточными определительными.

Союзы и союзные слова: which, that, who, whom.

This is the book which I'd like to read.

Именно эту книгу я хотел бы почитать / букв. - вот книга, которую.../

This is the naval cadet who knows English best of all.

Именно этот курсант знает английский лучше всех.

This is the naval cadet about whom I wanted to speak to you.

Вот курсант, о котором я хотел поговорить с вами.

There are the questions that must be discussed now.

Есть вопросы, которые следует обсудить сейчас.

2. Read the following text: System of Advanced Navigation*

The ballistic missile era has brought about with it a need for more exact method of obtaining navigational positions. Today such a system of advanced navigation is a reality and is installed on surface ships and submarines. This system consists of the following three major components:

SINS (Ships' Inertial Navigation System) ** ,

NAVDAC (Navigation Data Assimilation Computer) *** ,

Star Tracker****

SINS

This system provides the ship with an accurate and continuous position at all times. It is based on Newton's Law of Motion, and mechanically senses, by means of ultra-sensitive devices - accelerometers, the accelerations (changes of course and speed) which the ship undergoes. These accelerations, when combined with time, can be used to find continuously the ship's position in latitude and longitude. The SINS needs no information from outside the ship. Because SINS uses inertial forces, it is sometimes called an inertial navigator.

NAVDAC

The computer combines, evaluates and stores data received from other elements of the SINS system. It is a memory bank of highly accurate navigational data capable of rejecting navigational solutions of poor quality and accepting only those of a high degree of accuracy.

Star Tracker

The tracker is extremely sensitive device with radio or infra-red components that calculates elevation (altitude) and Azimuth data of celestial bodies. The use of the star tracker is not limited by poor visibility but may be used effectively in the heaviest of overcasts with a high degree of accuracy, since it can detect radio emanations of celestial bodies.

Notes

*System of Advanced Navigation — кораблевождение с использованием новых систем.

**Ships' Inertial Navigation System — корабельная инерциальная навигационная система.

***Navigation Data Assimilation Computer — навигационное счетно-решающее устройство.

****Star Tracker — система слежения по звездам.

*****Inertial Navigator — «инерциальный штурман»

Memory Bank — запоминающее устройство.

Data — множественное число существительного datum - данные.

Words to be learnt:

acceleration — ускорение

accelerometer — акселерометр

law — закон

inertial — инерциальный

celestial (body) — небесное (тело)

to sense — чувствовать

a store — память (вычислительной машины)

to detect — обнаруживать

to install — устанавливать

sensitive — чувствительный

to calculate — рассчитывать

star — звезда

device — прибор

EXERCISES