Stability

Question 0

Negative stability.

Answer 0

Will not right itself but fall over.

Question 1

Stability.

Answer 1

Ability to return to its upright position being healed by an external force.

Question 2

Positive stability.

Answer 2

Returns to position after force.

Question 3

Range of stability.

Answer 3

Tall narrow vs low wide shape.

Question 4

Center of gravity. G

Answer 4

Geometric center of an object.

Point where all the gravity is said to be from.

Question 5

Height of center of gravity.

Answer 5

Distance from G to K.

Question 6

Weight added to a form …

Answer 6

Changes range of stability.

Question 7

Center of buoyancy. B

Answer 7

Geometric center of the underwater shape of hull.

Just below G.

Question 8

Metacenter. M

Answer 8

Pivot point when a vessel is inclined.

Question 9

Positive metacenter height or positive GM.

Answer 9

Distance between metacenter and G.

Question 10

Righting arm.

Answer 10

A vector of horizontal force that rights a boat.

GZ.

Question 11

Tender vessel.

Answer 11

Metacentric height is low causing a long rolling period.

Like Abby.

Question 12

Stiff vessel.

Answer 12

Meta centric height is high causing vessel to have a short rolling period.
Quick righting. Snappy.

Question 13

Rolling period.

Answer 13

Time it takes to roll From side to side.

Question 14

Free surface effect.

Answer 14

When vessel heels, load shifts.
Baffles lessens this effect.
Cargo must be tied in place.

Question 15

List.

Answer 15

Vessel inclined by an internal force.

E.g., when cargo shifts.

Question 16

Loll.

Answer 16

State of unstable equilibrium. Inclined by an external force and stays. Can lurch from state to state.

Question 17

Longitudinal center of gravity. LCG

Answer 17

Center of flotation.

Tipping center.

Question 18

Draft line.

Answer 18

Numbers are 6” and 6” between.
Load lines on bow and stern should equal.
Table can tell a captain the load weight.

Question 19

Draft.

Answer 19

Distance between waterline and keel.

Question 20

Freeboard.

Answer 20

Indicator of reserve buoyancy.

Volume of a vessels watertight space above the waterlines.

Question 21

Load lines.

Answer 21

Plimsoll marks. Circle with horizontal line. Maximum weight of cargo.

TF: tropical fresh
F: fresh.

T: tropical
S: salt
W: winter
WNA: winter North Atlantic.

Question 22

Exceptions to load line rules include.

Answer 22

War vessels, fishing, and pleasure.

Question 23

Great Lakes load lines.

Answer 23

Has own scale with time of year. 
Midsummer: MS
Summer: S
Intermediate: I
Winter: W