Definitions

Question 1

What is displacement?

Answer 1

Displaces water so hulls settles down in water (DIW)

Question 2

What is semi displacement?

Answer 2

Combination of planing and displacement

Question 3

What is beam?

Answer 3

Widest part of the hull

Question 4

What is height?

Answer 4

Distance between center of gravity & metacenter

Question 5

What is fixed height?

Answer 5

The height of boat (measured from radar not mast)

Question 6

What is length?

Answer 6

Bow to stern

Question 7

What is freeboard?

Answer 7

Distance from weather deck to waterline on vessel

Question 8

What is draft?

Answer 8

Depth of waterline to keel

Question 9

What’s the measurement used to define boat displacement?

Answer 9

Tons (gross tons)

Question 10

What is planing?

Answer 10

Displaces, skins along water surface of water

Question 11

What are the two primary forces that affect a boats stability?

Answer 11

1) gravity

2) buoyancy

Question 12

What is center of gravity?

Answer 12

A point from which the weight of a body may be considered to act. (When weight is added gravity goes toward the added weight, when weight is removed it goes opposite.)

Question 13

What is buoyancy?

Answer 13

The weight of the water pushing on the boat causing it to float. ( upward force of water displaced by hull)

Question 14

What is equilibrium?

Answer 14

When boats at rest. Rolling–side to side,

Heeling–back & forth, listing–gravity not in the cent of boat until equilibrium/buoyancy is in the center.

Question 15

What are the two types of stability?

Answer 15

Longitudinal (heeling)

Transverse (rolling)

Question 16

Describe the two types of forces that affect stability?

Answer 16

Static: caused by placement of weight in the hull
Dynamic: caused by actions outside the hull such as wind a waves

Question 17

Define double braid

Answer 17

Made of two hollow braid ropes one inside the other

Question 18

Define plain laid

Answer 18

Made up of 3 strands mostly right laid

Question 19

Define polypropylene line

Answer 19

Synthetic fibers w/ half strength as nylon 25% lighter & floats

Question 20

Define nylon, including double braid

Answer 20

Synthetic: has great strength, elasticity, resistance to weather, slippery, elastic, used for towing lines

Question 21

Define natural fiber

Answer 21

Organic material, plant fiber, used for tying fenders, secure chafing gear, & other parts where strength isn’t a major concern.

Question 22

What is a bitter end?

Answer 22

Running end or free end of a line normally the part not worked with

Question 23

What’s a standing part?

Answer 23

Remaining part of line part of the line not worked with

Question 24

What’s a bowline?

Answer 24

A temporary eye in a line

Question 25

What are the 5 parts of an anchor?

Answer 25

• stock
• fluke
• shank
• crown

Question 26

How do you identify a boat is moving backwards?

Answer 26

3 short blast

Question 27

Identify short blast

Answer 27

About 1 sec

Question 28

Identify prolong blast

Answer 28

Leaving the pier 4-6 sec

Question 29

Identify danger signal

Answer 29

5 blast or more

Question 30

Identify signal for intention or coming to port (inland)

Answer 30

2 short blast

Question 31

Identify whistle signal for sailing vessels in reduced visibility

Answer 31

1 prolonged 2 short every 2 min

Question 32

Recognize & report overtaking situations

Answer 32

1right 2 left