Exam (elaborations)
DCASE Unit 2.
- Course
- Institution
Exam of 7 pages for the course EMSIC - Michigan Study Guide at EMSIC - Michigan Study Guide (DCASE Unit 2.)
[Show more]
Seller
Follow
denicetho
Content preview
DCASE Unit 2What are the conditions of critical stability? - ANS-a) Floodable length exceeded.
b) Neutral or negative GM.
c) Listing to the danger angle (1/2 max righting arm (GZ)).
d) Damage with bad weather.
What is the displacement? - ANS-The weight of the volume of water displaced by the
hull at the waterline (expressed in LT)
What are the stability Reference points? - ANS-M - Metacenter
G - Center of Gravity
B - Center of Buoyancy
K - Keel
*Mother Goose Beats Kids
As the waterline/draft increases, the buoyancy __________. And as the waterline/draft
decreases, the buoyancy ___________? - ANS-Increases, decreases
B follows the waterline
Adding weight ________ draft.
Removing weight ________draft. - ANS-Increases, decreases
If a weight is shifted down, G moves ___________.
If a weight is shifted up, G moves ___________. - ANS-Down, Up
G follows a weight shift
G moves _________ weight additions and moves __________ weight removals. -
ANS-towards, away from
As B moves up, M moves ______. - ANS-Down
M moves opposite of B
What is the range for initial stability? - ANS-0-10 degrees
, What is a permanent list? - ANS-A permanent angle of inclination
What are three conditions that can cause a ship to take a permanent list? - ANS-a) G off
center line
b) Negative GM
c) combination of both
What is heel? - ANS-A semi-permanent angle of inclination caused by external forces
(e.g., high speed turns, beam winds, heavy seas)
What are the three conditions of stability and how are they defined? - ANS-a. Positive -
G is below M; Righting moments
b. Neutral - G is equal to M; No moments because no distance btw G and M to create a
moment
c. Negative - G is above M; Upsetting moments
What are four things to keep a ship afloat? - ANS-1. Follow LLI (Liquid loading
instruction)
2. Maintain WTI (Watertight integrity)
3. Do not submerge limiting draft marks
4. No abnormal topside weights
What is a good measure of initial Stability? How is it calculated? - ANS-GM
GM = KM - KG
What is the reference point for initial stability? Which reference points affect it? - ANS-M
- Metacenter
Affected by B and G, because it is the intersection of the lines of these forces.
What is the GZ? - ANS-Righting Arm = the perpendicular distance between the center
of gravity and center of buoyancy
What is the max righting arm? - ANS-point where ship exerts the most energy to right
itself
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller denicetho. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $9.34. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
77858 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now