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