SHALLOW WATER EFFECTS SQUAT

• PROPORTIONAL TO:

  • SPEED
  • DISPLACEMENT
  • DEPTH & BREADTH OF CHANNEL

• CAN CAUSE SHIP TO STRIKE BOTTOM

• CAUSES WET WELLS TO INCREASE DEPTH UNEXPECTEDLY AND OUT OF CONTROL

• REDUCED RUDDER EFFECTIVENESS

• LESS SPEED

• SHIP’S WAKE CAN BE AN INDICATOR

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REFERENCES: MSI STUDENT GUIDE

Notes:

BOTTOM EFFECTS CAN BE EXPERIENCED IN WATER DEPTHS UP TO 15 TIMES THE DRAFT OF THE SHIP BUT THE EFFECTS WILL NOT BE SIGNIFICANT UNTIL WE ARE IN ABOUT 2.5 TIMES THE DEPTH OF OUR DRAFT.

IF A SHIP IS EXPERIENCING SQUAT THE WAKE WILL WIDEN CONSIDERABLY.