Section 1 - Introduction

Question 1

Controlability includes:

Answer 1

• starting
• steering a steady course
• turning
• slowing
• stopping
• backing
• diving (submarines)

Question 2

The study of the complex subject of controllability is usually divided into 3 distincted areas or functions:

Answer 2

• coursekeeping (steering)
• maneuvering
• speed changing

Question 3

Coursekeeping (steering)

Answer 3

the maintenance of a steady mean course or heading

Question 4

Maneuvering

Answer 4

the controlled change in the direction of motion (turning or course changing)

Question 5

Speed changing

Answer 5

the controlled change in speed including stopping and backing

Question 6

________________ and _________________ characteristics are particularly sensitive to ship trim.

Answer 6

Coursekeeping / maneuvering

Question 7

For conventional ships, the two qualities of ________________ and _______________ may tend to work against each other.

Answer 7

Coursekeeping / maneuvering

Question 8

Three tasks are generally involved in producing a ship with good controllability:

Answer 8

• establishing realistic specifications and criteria for coursekeeping, maneuvering and speed changing
• designing the hull, control surfaces, appendages, steering gear, and control systems to meet these requirements and predicting the resultant performance
• conducting full scale trials to measure performance for comparison with required criteria and predictions