UNIT #4 II

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Author:
jonnyblazyn11
ID:
208275
Filename:
UNIT #4 II
Updated:
2013-03-19 23:36:10
Tags:
STABILITY BUOYANCY
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Description:
UNIT 4 TEST
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  1. SINE
    VERTICAL DIRECTION
  2. COSINE
    HORIZONTAL DIRECTION
  3. FREE SURFACE EFFECT
    THE AMOUNT OF SPACE IN A COMPARTMENT THAT LIQUID HAS THE ABILITY TO MOVE TO.
  4. HOW TO AFFECT FREE SURFACE EFFECT?
    • POCKETING- ALMOST FULL
    • POCKETING- SHALLOW
    • SLUICE VALVE- CLOSED
    • SURFACE PERMEABILITY
  5. HYDROSTATIC PRESSURE
    INCREASES AS DEPTH INCREASES
  6. WHAT 3 SITUATIONS MUST EXIST TO HAVE FREE COMMUNICATIONS EFFECT (FCE)?
    • COMPARTMENT OPEN TO THE SEA
    • COMPARTMENT PARTIALLY FLOODED
    • COMPARTMENT OFF-CENTERLINE OR UNEVEN ABOUT THE CENTERLINE.
  7. HOW CAN YOU REDUCE FREE COMMUNICATION EFFECT (FCE)?
    • POCKETING
    • VENTING
  8. A TOTAL RISE OF GRAVITY IS?
    FREE SURFACE EFFECT (FSE) + FREE COMMUNICATION EFFECT (FCE).
  9. WHAT IS LCF?
    LONGITUDINAL CENTER OF FLOTATION (LCF)
  10. WHAT IS DRAG?
    DESIGN FEATURE TO HAVE DRAFT AFT GREATER THAN DRAFT FORWARD.
  11. WHAT IS TRIM?
    DIFFERENCE BETWEEN THE FORWARD AND AFT DRAFTS, IN EXCESS OF DRAG.
  12. WHAT IS PARALLEL SINKAGE?
    THE DISTANCE THAT THE DRAFTS FORE AND AFT INCREASE DUE TO A WEIGHT ADDITION.
  13. WHAT IS PARALLEL  RISE?
    THE DISTANCE THAT THE DRAFTS FORE AND AFT DECREASE DUE TO A WEIGHT REMOVAL.
  14. WHAT DO YOU DO WHEN GROUNDED
    • WEIGH THE SHIP DOWN HARD
    • INVESTIGATE FOR DAMAGE
    • DETERMINE TONS AGROUNDS
    • CALCULATE CRITICAL DRAFT
  15. WHILE IN DRYDOCK
    • DRY WEIGHT LOG (500 LBS) OR MORE
    • SKIN VALVES BLACK FLANGED
    • PERMISSIOIN FOR OVERBOARD DISCHARGE
    •     VERIFY FROM FARTHEST AND HIGHEST          PLUG FROM RISER
  16. WHAT GUIDELINES MUST BE ADHERED TO IN ORDER TO MAINTAIN A SATISFACTORY CONDITION WITH REGARD TO STABILITY?
    • LIMITING DRAFT MARKS NOT SUBMERGED PRIOR TO DAMAGE
    • NO ABNORMAL TOPSIDE WEIGHTS
    • LIQUID LOADING INSTRUCTIONS ARE FOLLOWED
    • WATERTIGHT INTEGRITY IS MAINTAINED
  17. FOUR TYPES OF SINKAGE?
    • BODILY SINKAGE= NEGATIVE (GB)
    • CAPSIZING= NEGATIVE (GM)
    • PLUNGING = LOSS OF LONGITUDINAL STABILITY
    • BREAKING UP = LOSS OF SHIPS GIRDER
  18. GREEN SPACE
    FLOODING OF GREEN SPACES WILL IMPROVE STABILITY
  19. PINK SPACE
    FLOODING OF PINK SPACES WILL DECREASE STABILITY BECAUSE OF ADDED HIGH WEIGHT.
  20. YELLOW SPACE
    FLOODING OF YELLOW SPACES WILL IMPROVE STABILITY IF NO FREE SURFACE EXISTS
  21. FLOODING LENGTH
    THE MAXIMUM DISTANCE WITHIN THE SHIP THAT CAN BE SYMMETRICALLY FLOODED WITHOUT SUBMERGING THE MARGIN LINE.
  22. MARGIN LINE
    AN IMAGINARY WATERLINE LOCATED THREE INCHES BELOW THE BULKHEAD DECK.
  23. HOW TO COMBAT PROGRESSIVE FLOODING (PFL)
    • WATERTIGHT INTEGRITY
    • COMPARTMENTALIZATION
  24. THREE STEPS IN FLOODING CASUALTY?
    • STEP ONE - ESTABLISH FLOODING BOUNDARIES
    • STEP TWO - DEWATER ANY PINK SPACES
    • STEP THREE - SIZE UP THE SITUATION TO DETERMINE WHETHER STABILITY IS CRITICAL BEFORE ANY FURTHER ACTION IS TAKEN.
  25. WHAT FOUR THINGS ARE REQUIRED FOR CRITICAL STABILITY?
    • 1. SHIP HAS NEGATIVE GM - ELIMINATE (FSE/FCE) SHIFT WEIGHT DOWN.
    • 2. SHIP IS LISTING TO THE DANGER ANGLE - DETERMINE CAUSE OF LIST, CORRECT FOR GM
    • 3. FLOODABLE LENGTH EXCEEDED - DE-WATER, SHORE HOLES AND BULKHEADS
    • 4. DAMAGE WITH BAD WEATHER - MANEUVER SHIP OUT OF WEATHER
  26. WHAT NSTM IS FOR DRY DOCK?
    NSTM 997
  27. WHAT CAN COUNTER ACT FREE SURFACE EFFECT (FSE)?
    • POCKETING
    • SLUICE VALVES CLOSED
    • SURFACE PERMEABILITY
  28. WHAT CAN COUNTER ACT FREE COMMUNICATION EFFECT (FCE)?
    • VENTING
    • POCKETING
  29. WHAT ARE THE TWO (2) TYPES OF POCKETING?
    • SHALLOW= ALMOST EMPTY
    • FULL= ALMOST FULL
  30. WHAT IS THE MOST IMPORTANT PUB FOR SHIP STABILITY?
    DC BOOK SECTION II (a)
  31. WHAT ARE FOUR (4) SHIPS LIMITATIONS TO SHIPS DESIGN?
    • NO ABNORMAL TOPSIDE WEIGHT
    • WATER TIGHT INTEGRITY
    • LIQUID LOAD DIAGRAMS BEING FOLLOWED
    • LIMITING DRAFT MARKS NOT SUBMERGED PRIOR TO DAMAGE
  32. IF WEIGHT IS REMOVED FROM FLIGHT DECK, WHAT HAPPENS TO THE WATER LINE?
    DECREASES (GOES DOWN)
  33. WHEN WEIGHT IS REMOVED FROM FLIGHT DECK WHAT HAPPENS TO METACENTER?
    INCREASES (GOES UP)
  34. WHEN WEIGHT IS REMOVED FROM THE FLIGHT DECK, WHAT HAPPENS TO GRAVITY (G)?
    DECREASES (GOES DOWN)
  35. WHEN (GM) INCREASES ROLL PERIORDS ARE?
    FASTER
  36. WHEN (GM) IS DECREASED ROLL PERIODS ARE?
    SLOWER
  37. WHY DOES GM DECREASE WHEN SHIPS RUN AGROUND?
    THERE IS A WEIGHT REMOVAL FROM THE BOTTOM OF THE SHIP.  (G) GOES AWAYS FROM WEIGHT REMOVAL (M) GOES AWAY FROM WATER LINE.
  38. WHAT STEPS DO YOU TAKE AS THE DCA WHEN SHIPS RUN AGROUND?
    • WEIGH THE SHIP DOWN HARD
    • CALCULATE TONAGE AGROUND
    • INVESTIGATE FOR DAMAGE (BOUNDARIES)
    • CALCULATE CRITICAL DRAFT
  39. WHAT MAKES STABILITY CRITICAL?
    • NEGATIVE (GM)
    • LISTING TO DANGER ANGLE
    • WHEN FLOODABLE LENGTH IS EXCEEDED
    • DAMAGE IN BAD WEATHER
  40. WHY IS NEUTRAL STABILITY BAD?
    BECAUSE THERE IS ALWAYS GOING TO BE AN OUTSIDE FORCE PUSHING ON THE SHIP CAUSING A POTENTIAL CAPSIZE.
  41. WHO DO YOU HAVE TO TRAIN BEFORE ENTERING DRY DOCK?
    IMPORT EMERGENCY TEAM (IET)
  42. WHAT ARE YELLOW SPACES?
    SPACES THAT INCREASE STABILITY WHEN FLOODED.
  43. IF YELLOW SPACES ARE NOT COMPLETELY FILLED WITH WATER THEY CAN CAUSE WHAT?
    FREE SURFACE EFFECT (FSE)
  44. WHAT ARE THREE CAUSES OF A LIST?
    • (G) OFF THE CENTERLINE
    • NEGATIVE (GM)
    • OR COMBINATION OF BOTH
  45. REASON TO BALLAST?
    • AMPHIBIOUS OPS
    • LOWER (G) FOR DAMAGE
  46. WHAT IS THE DANGER ANGLE?
    HALF OF THE MAXIMUM RIGHTING ARM ANGLE
  47. WHAT IS FLOODABLE LENGTH?
    WHEN THE MAXIMUM LENGTH OF CONSECUTIVE COMPARTMENTS THAT CAN BE FLOODED WITHOUT SUBMERGING THE MARGIN LINE.
  48. HOW DO YOU COUNTER ACT FLOODABLE LENGTH?
    DE-WATERING
  49. HOW DO YOU COUNTER-ACT LISTING TO YOUR DANGER ANGLE?
    SHIFT WEIGHT TO THE OPPOSITE SIDE
  50. WHEN PULLING OUT FROM DRY DOCK, WHAT PLACES HAVE TO BE MANNED?
    • ANY SPACE WHERE THE BLOCKS MADE CONTACT WITH HULL
    • ANY SPACE THAT HAD WORK DONE TO IT
    • HULL PENETRATIONS
  51. WHAT IS BODILY SINKAGE?
    WHEN GRAVITY (G) OUT WEIGH'S BUOYANCY (B)
  52. WAYS A SHIP CAN SINK?
    • BODILY SINKAGE
    • CAPSIZING
    • PLUNGING
    • BREAKING UP
  53. WHAT IS SAGGING?
    • WHEN THE DRAFT OF THE CENTER OF SHIP IS DEEPER THAN FORE AND AFT
    • (SHIFT WEIGHT FORE AND AFT)
  54. WHAT IS HOGGING?
    • WHEN THE DRAFT FORE AND AFT IS DEEPER THAN THE CENTER OF THE SHIP
    • (SHIFT WEIGHT TO CENTER)
  55. COMPARTMENT 4-305-1-E
    B=35 L=40 H=12 D= 5.5
    PRT SIDE OF COMPARTMENT IS 10FT FROM SHIPS CENTERLINE.

    SOLVE FOR WEIGHT OF FLOODING (w) AND WEIGHT FINAL (Wf)? WEIGHT ORIGINAL(WO)=9000LT
    • 35X40X5.5= (w)=220LT
    • 35 FT3-LT

    (w)220LT + (WO)9000LT= 9220LT
  56. FIND FREE COMMUNICATION EFFECT (FCE)?
    COMPARTMENT 4-305-1-E, 10 FT FROM SHIPS CENTERLINE
    B=35 L=40 (Wf)=9220LT
    • 35X40X27.52  =3.29LT  
    • 35 FT3 x (Wf)     
    •      LT
  57. HOW DO YOU SOLVE FOR Y2
    HALF (1/2) WIDTH OF SHIP MINUS(-) HALF (1/2) WIDTH OF COMPARTMENT

    OR

    HALF (1/2) WIDTH OF COMPARTMENT PLUS (+) DISTANCE OF COMPARTMENT TO CENTERLINE
  58. COMPARTMENT 4-305-1-E
    B=35 L=40 D=5 LBP 500FT LCF= 30 AFT PERP
    MT1= 1595FT-IN TPI=52.1T-IN

    SOLVE FOR PARALLEL SINKAGE(P/S) AND TA
    • (PS) =(w)=220LT 
    •                  52.1    =4.30FT
    •     325 - 280
    • |-[--♦--]---∧-----|---------------|
    • 500        LCF  250               0

    325-280= (TA)=45FT

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