OCIMF_Mooring_Equipment_Guidelines_(Second_Edition)

Section

3.

2.

2.

Maximum Longitudinal and Transverse Forces Under the Standard

Environmental Criteria

Pagl"

32

2.4.1 Maximum Longitudinal and Transverse Force5 on Oil Tankcr.~ 32

2.4.2 Maximum Longitudinal and Transverse Forces on 75,000 m,l

Gas Carrier with Membrane or Prismatic Tanks 33

2.4.3 Max imum LongilUdinal and Transverse Forces on 125,000 m)

Gas Carrier with Spherical Tanks 33

Mooring Restraint Requirements

2.5.1 Basic Principle~ of Mooring Calculations

34

34

2.5.1.1 The Principle of Static Equilibrium 34

2.5.1.2 The Load/Denecrion Characterist ics of each Mooring

Line and Breasting Dolphin 34

2.5.1.3 The Geometrical Relationship Between the P(lTl5 of the

System

2. 5.2 CompUler Calculations

2.5.3 Hand Calculation Procedures

2.5.4 Standard Restrainr Requirements

35

35

36

)

2.6 Approximate Methods for Determining Mooring Restraint Requiremenrs

for Tankers and Gas Carriers Under Standard Environmental Criteria 38

2.6.1 Mooring Restraint Requirements for Oil Tankers above

16 kDWT

2.6.1.1 Wire S~'stems

2.6.1.2 Synthetic Line Systems

2.6.2 Rough Spring Line Restrainr Determinalion for Oil Tankers above

39

39

40

16 kOWT when the Ship's Transverse Wind Area is Unknown 40

2.6.3 Rough Breast Line Restraint Determination for Oil Tankers above

16 kDWT when the Ship's Lateral Wind Area is Unknown 40

2.6.4 Mooring Restraint ReQuirements for Gas Carriers 40

2.6.5 Example Calculations 41

MOORING ARRANGEMENTS A~D LAYOUTS 4S

45

45

46

47

47

54

58

58

58

3.

3.

3.

3.

3.

Principal Objectivci

Requirements at Piers and Sea Islands

3.2.1 Number and Size of Lines

3 .2.2 Arran8emenl~ for Breast Lines

3.2.3 Arrangements for Spring Lines

3.2.4 Special Arrangements for Gas Carriers

Requirements at SPMs

Requirements for Emergency Towing

Requirement~ for Mulli-Buoy Moorings

IV