SEAMANSHIP

Question 1

What are the two types of keels?

Answer 1

Bar keel - which extends below the boat. Offers more protection and strength but has a deeper draft.

Flat plate keel - is built within the vessels hull and does not increase vessels draft.

Question 2

What are the three basic hull types?

Answer 2

Displacement - pushing water (tug)

Planing - rides on top of water (small boat)

Semi-displacement - a combo of both displacement and planing (yacht)

Question 3

What are the 3 different types of rudders?

Answer 3

Balanced - rudder post attaches in the middle of the blade

Semi-balanced - more than half of the blade is aft of rudder post.

Unbalanced - blade is entirely aft of rudder post.

Question 4

What is the front edge of a blade on a prop called?

Answer 4

Leading edge

Question 5

What is the back edge of a blade on a prop called?

Answer 5

Trailing edge

Question 6

The upper edge on a boats side is called?

Answer 6

Gunwale (pronounced “gun-ul”

Question 7

What is a temporary list caused by external forces called?

Answer 7

Heel

Question 8

___________ - force of water on the hull acting in a vertical or upward force pushing it up, causing the vessel to float.

Answer 8

Buoyancy

Question 9

___________ - the Point at which the weight of the boat acts vertically downward.

Answer 9

Center of gravity

Question 10

__________ - permanent leaning of a vessel.

Answer 10

List

Question 11

What are dynamic forces?

Answer 11

The surroundings effect on the ship/boat.

Sea / wind / current

Question 12

What are static forces?

Answer 12

Boats effect on itself

Difference in weight distribution and buoyancy.

Question 13

Block and tackle.
Using a single standing block and a single moving block is called __________ tackle.

Answer 13

Gun Tackle

Question 14

Block and tackle.
Using a single standing block and a double moving block is call a ________ tackle.

Answer 14

Luff Tackle.

Question 15

Block and tackle.
Using a double standing block and a double moving block is called a ________________________.

Answer 15

Twofold purchase.

Question 16

Block and tackle.
A tackle is “two blocked” when the blocks are?

Answer 16

Jammed together

Question 17

___________ - To be thrown broadside to surf or heavy sea.

Answer 17

Broach

Question 18

Equation for Fahrenheit to Celsius?

Answer 18

Subtract 30 ÷ 2

Question 19

Top of a wave, breaker, or swell.

Answer 19

Crest

Question 20

To move through the water sideways.

Answer 20

Crab

Question 21

The difference between true and magnetic north?

Answer 21

Variation

Question 22

The amount of deflection, influenced by a vessel and electronics on the compass.

Answer 22

Deviation

Question 23

What are the three basic types of waves?

Answer 23

Spilling, plunging and surging

Question 24

A Small line attached to the small end of a drogue, so the device can be turned around to be retrieved.

Answer 24

Tripping line

Question 25

The valley between waves is called?

Answer 25

Trough

Question 26

A current that runs parallel to the shore and inside the breakers as a result of the water transported to the beach by the waves.

Answer 26

Longshore current

Question 27

A current created along a Long Beach or reef surf zone due to water from waves hitting the beach and traveling out to the sides and parallel to the shore line, creating a long shore current that eventually returns to sea.

Answer 27

Rip current

Question 28

Warm moist air moving over cold water or land creates.

Answer 28

Advection fog