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Flashcards in Definitions Deck (32)
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1

What is displacement?

Displaces water so hulls settles down in water (DIW)

2

What is semi displacement?

Combination of planing and displacement

3

What is beam?

Widest part of the hull

4

What is height?

Distance between center of gravity & metacenter

5

What is fixed height?

The height of boat (measured from radar not mast)

6

What is length?

Bow to stern

7

What is freeboard?

Distance from weather deck to waterline on vessel

8

What is draft?

Depth of waterline to keel

9

What's the measurement used to define boat displacement?

Tons (gross tons)

10

What is planing?

Displaces, skins along water surface of water

11

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

1) gravity
2) buoyancy

12

What is center of gravity?

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.)

13

What is buoyancy?

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

14

What is equilibrium?

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.

15

What are the two types of stability?

Longitudinal (heeling)
Transverse (rolling)

16

Describe the two types of forces that affect stability?

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

17

Define double braid

Made of two hollow braid ropes one inside the other

18

Define plain laid

Made up of 3 strands mostly right laid

19

Define polypropylene line

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

20

Define nylon, including double braid

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

21

Define natural fiber

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

22

What is a bitter end?

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

23

What's a standing part?

Remaining part of line part of the line not worked with

24

What's a bowline?

A temporary eye in a line

25

What are the 5 parts of an anchor?

- stock
- fluke
- shank
- crown

26

How do you identify a boat is moving backwards?

3 short blast

27

Identify short blast

About 1 sec

28

Identify prolong blast

Leaving the pier 4-6 sec

29

Identify danger signal

5 blast or more

30

Identify signal for intention or coming to port (inland)

2 short blast