OCIMF_Mooring_Equipment_Guidelines_(Second_Edition)

Su mm aT)' of wind and currenl loads for Standard Environmental Criteria

Loaded 250 kdwt tanker

Table showing the wind loads on a fully loaded 250 kdwt tanker for a wind speed of 60 knot.s at a
10 m elevation.

Force (kN) A ngle of wind 011 the stern

0° 30° 60° 65° 90° 100° 120° 1500 1800

Fx .. +^353 +304 +^137 +^20 -^157 -346 -451

F YAw +677 + 922 +^930 +^863 +^706 +^355

FyF .. +^147 + 324 + 481 + 500 + 451 + 243

Table showing current loads on a fuUy loaded 250 kdwt tanker for the current speeds shown and a
draft of 19.2 m.

Force (kN) A ngfe and speed of current on the stern average velocity

0° /3 knots 10°12 knOtS 80° /3/4 knots 100" /3/4 knots 170° /2 knots

Fx~ + 276^0 18

FyAc +156<.1 + 758

FyFc + 358 +600

Maximum combination of forces-loaded case

• 451 - 268

+ 930 + 1569

+ 500 + 1467

• 22

• 652


• 681

• 719 kN from ahead
  2499 kN
  1967 kN

Ballasted 250 kdwt tanker (Wind speed = 60 knots at 10 m height)

Force (kN) Angle of wind on the stem

30°

0

+ 597

+ 1467

1800 /3 knots

-268

Fxw +490 +441 + 216

IWO

-108

+ 1678

• 363 -697
  F YAk' + 1550 + 2384 + 2420 + 2295 +775

Fyp .. +334 +^1128 +^1903 +^2190 +^2168 +^1285

Table showing current loads on a ballastcd 250 kdwt tanker for the current speeds shown and a draft

of 6.1 m.

Force (kN) Angle and speed oJ current on the stern uverage velocilY ~

0° /3 knots 10°12 knot.s 750 /3/4 knot.s 1100 /3/4 knots 1700 /2 knots 180° /3 knots

F-yc +^132 +^63 +^2 0 -^47 -^93

F fAC +^54 +64 + 49 +^60

FyFc + 22 + 50 + 63 + 49

• ba.\ed on coeffi cient for waler depth 10 draft ratio of 1.5: I since data is nOl 8\'ijjl"ble for Ihe ~i:lllda1d ralio of ).0: t

Maximum combination of forces - ballast case

F x - 697 - 93 - 790 kN from ahead

F YA + 2420 + 64 + 2484 kN

F YF + 2190 + 63 == + 2253 kN