that senses the performance of the machine…and intended performance为定语 从句修饰a self-regulating mechanism,在这个 定语从句中，senses the performance, compares it with the intended performance 与adjusts the machine并列，中间用and连接。
b. 本句可译为：
术语“自动化”或自动控制，通常用来指机 器通过自我调节装置来运行。此装置能感知 机器的运转状况，并通过称作反馈的过程将 其与预期的运转状况进行比较，然后，调整 机器以减小实际与预计运转状况之间的差异。
3. Remote control means that the system is being controlled by the operator who is situated remote from the system.
c. in the rooms refers to in the machinery control rooms.
5. In order to ensure the safety of the ship and its equipment during UMS operation,certain essential functions must be provided.
2. The term ‘automation’, or automatic control, generally is taken to mean the operation of a machine by a self-regulating mechanism that senses the performance of the machine and, using a process called feedback, compares it with the intended performance, and then adjusts the machine to reduce the difference between actual and intended performance.
8. UMS: Unattended Machinery Space 9. In the event of 10.be informed of
II. Analysis of long and difficult sentences
1. Control systems on board ship are either automatic or remote or a combination of these. a. on board ship 作定语修饰control systems,本短语译为船上的控制系统。 b. either…or…:要么…要么
Focus
1. the three kinds of control systems on board ship especially the combination of automatic and remote control
2. the definition of automatic and remote control
3. the use of computers in a full automatic control system
4. the use of audible and visual alarms in the control system
5. UMS
Reading material C: boiler water level control
Lesson 28
Focus Remote control, automatic control and a combination of these The usages of computers UMS Reading material C : boiler water level control
I. Phrases:
1. automation 2. automatic control 3. a self-regulating mechanism 4. remote control 5. a machinery control room 6. an alarm system 7. an audible and visual alarm
a. in order to ensure the safety of the ship and its equipment during UMS operation作目的状语，其中the ship与its equiptial functions must be provided为主句，且为一被动句型。
that the system is being controlled by the operator 为宾语从句
who is situated remote from the system作定语修饰the operator
4. The operation state and parameters of working condition of machines can be recorded, displayed and controlled automatically, or manually in the rooms.
a. the operation state and parameters of working condition of machines 为主语，机器 的运转状况和工况参数
b. recorded,displayed与controlled并列，而 automatically 与manually并列。
Remember the following point: When a boiler is operating, the water
level in the gauge glass reads higher than when the boiler is shut down.
a. This sentence is very long, 主语为
the term, automation or automatic control 为the term 的同位语，其中 automation 与automatic control 又是同 位语。
谓语为is taken,to mean the operation of a machine by a self-regulating mechanism为 不定式作主语补足语，
using a process called feedback作状语 修饰compares,其中called feedback修饰 process,
to reduce the difference between the actual and intended performance为不 定式作目的状语。
4. What does remote control mean?
5. What kind of alarms will be given when a fault condition is located?
6. What does UMS refer to?
7. When are UMS mainly unattended? And who should have control of the main engine?
Questions
1. What can control systems on board ship be divided into?
2. What is automatic control? 3. what is used to supervise, analyze,
record and display the conditions of the machine in a full automatic control system?