Ship Handling Facts "ROT" Flashcards
SWE STANDS FOR ___________
SHALLOW WATER EFFECT
SWE FULL EFFECT AT _____ x draft
1.2
1.5
2
2.5
1.2 X DRAFT
SWE FELT AT LESS THAN _____ x draft
1.2
1.5
2
2.5
2 X DRAFT
SWE SIGNIFICANT EFFECT AT ____ x draft
1.2
1.5
2
2.5
1.5 X DRAFT
SWE TURNING CIRCLE UP TO ____ IN DEEP WATER
2 times greater than
SWE - RATE OF TURN IS ____ AS FOR DEEP WATER TURN
THE SAME
SWE - PRODUCES ____ STEERING CHARACTERISTICS
IMPROVED (PROVIDED NOT TRIMMED BY THE HEAD)
SWE - SHIP TWISTS MORE WHEN ____
Backed or ahead?
BACKED (MAY BECOME UNRELIABLE: ROWE pg. 26)
IN SWE SHIP CARRIES HER WAY ____ WITH ENGINE STOPPED
Longer or shorter?
LONGER
IN SWE THERE IS _____ WAVE MAKING
Increased or decreased?
INCREASED
IN SWE ____ SPEED FOR GIVEN RPM
Reduced or increased?
REDUCED
SWE ____ THE TRIM
CHANGES (BOW OR STERN DEPENDING ON SHIP AND INITIAL TRIM)
SWE- CHANGE OF OVERALL ____
DRAFT (SINKAGE)
SWE- CHANGE OF TRIM AND DRAFT (SINKAGE) = _____
SQUAT
SWE- ____ SHIP TO SHIP AND SHIP TO BANK EFFECTS
INCREASES
SWE- OPEN WATER SQUAT (FT) = _____
Cb X V²/30
SWE- SHALLOW WATER SQUAT (FT) = ____
2 X (Cb X V²/30)
SWE- CB 0.75+ TEND TO ____ BY THE HEAD
SQUAT
Cb = ____
BLOCK COEFFICIENT
V =
SPEED
SWE- SQUAT GENERALLY INCREASES ____ AS TWO SHIPS PASS IN A CHANNEL
50%
SWE- KEEP SPEEDS TO A MAX OF ____ WITH ____ UKC
6 KNOTS, 5 FEET
SWE- LIST CAUSED BY TURN AND SQUAT UNDER HULL AT THE OUTSIDE OF THE TURN IS A ____ FACTOR THAT ____ UKC
SIGNIFICANT, REDUCES
SWE-DOES ACCELERATION INCREASE OR DECREASE SQUAT?
INCREASES
PP IS LOCATED _______ FOR ACCELERATED TURN AHEAD FROM STOPPED.
1/8L FROM BOW
PP =
PIVOT POINT
PP IS LOCATED ____ FOR INITIAL STAGE OF TURN WITH HEADWAY
1/4L FROM BOW
PP IS LOCATED ____ FOR STEADY TURN
1/3L FROM BOW
PP MOVES ____ DURING ACCELERATED TURN
FORWARD
PP- MOVES ____ FOR GOING ASTERN
FORWARD