BA TIDE DIAMOND. Current = the horizontal movement of a body of water. Causes: Gravitational effects...
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Transcript of BA TIDE DIAMOND. Current = the horizontal movement of a body of water. Causes: Gravitational effects...
BA TIDE DIAMONDBA TIDE DIAMOND
BA TIDE DIAMONDBA TIDE DIAMOND
Current = the horizontal movement of a body of water.
Causes:
Gravitational effects of sun and moon Heating and cooling of Earth’s atmosphereWinds blowing across the ocean’s surfaceChanges in salinity due to rain and evaporationThe Coriolis effect
Set - the direction of the currents motionDrift - the velocity of the currentSet & Drift represent the vector added to ship’s motion by the current
TIDE CURRENT
BA TIDE DIAMONDBA TIDE DIAMOND
BA TIDE DIAMONDBA TIDE DIAMOND
1400 DR7th Feb.
HW
LW
1010
1410 DR
SET : 2650
Drift : 2,6 Knot For Spring Tide 1,3 Knot Neap Tide
BA TIDE DIAMONDBA TIDE DIAMOND
1400 DR7th Feb.
HW
LW
1410 DR
SET : 2650
Drift : 2,6 Knot For Spring Tide 1,3 Knot Neap Tide
We will check Mean Range and Actual Range for Actual Drift
Proceed
BA TIDE DIAMONDBA TIDE DIAMOND
1400 DR7th Feb.
1410 DR
SET : 2650
Drift : 2,6 Knot For Spring Tide 1,3 Knot Neap Tide
ACTUAL RANGE = 5,5 mMEAN RANGES Springs = 6 mNeaps = 3,2 m
We will compare ranges and make a interpolation
BA TIDE DIAMONDBA TIDE DIAMOND
1400 DR7th Feb.
1410 DR
SET : 2650
Drift : 2,6 Knot For Spring Tide 1,3 Knot Neap Tide
Springs = 6 m 2,6 Knot
Neaps = 3,2 m 1,3 Knot1,3 Knot2,8 m
Z
0,5 m Y
ACTUAL RANGE = 5,5 m
Y = ( 0,5 x 1,3 ) / 2,8Y = 0,23
Z = 2,6 – 0,23Z = 2,37 = 2,4 Knot
MEAN RANGES Springs = 6 mNeaps = 3,2 m
ACTUAL RANGE = 5,5 m
BA TIDE DIAMONDBA TIDE DIAMOND
1400 DR7th Feb.
1410 DR
SET : 2650
Drift : 2,4
Questions
HW
LW
ACTUAL RANGE = HW – LW6,5 – 15,5 m