Dockmaster Training Manual

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Dockmaster Training Manual DOCKMASTER’S TRAINING MANUAL DOCKMASTER TRAINING MANUAL By HEGER DRY DOCK, INC. © April 2018 i DOCKMASTER’S TRAINING MANUAL TABLE OF CONTENTS SECTION 1 – DRY DOCK TYPES Page 1.1 Basin Dry Docks .......................................................................................... 1-2 1.2 Floating Dry Docks ...................................................................................... 1-14 1.3 Marine Railways .......................................................................................... 1-36 1.4 Vertical Lifts ............................................................................................... 1-47 1.5 Marine Travel Lifts ....................................................................................... 1-50 SECTION 2 – DOCKING PLAN 2.1 Docking Plan .............................................................................................. 2-1 2.2 Modifying the Docking Plan ........................................................................... 2-12 2.3 When There is No Docking Plan ..................................................................... 2-15 SECTION 3 – SHIP CHARACTERISTICS IMPORTANT TO DRY DOCKING 3.1 Dimensions & Clearances ............................................................................. 3-1 3.2 Ship Strength ............................................................................................. 3-2 3.3 Hydrostatic Properties .................................................................................. 3-4 3.4 Calculation of Displacement .......................................................................... 3-4 3.5 Longitudinal Center of Buoyancy (LCB) ........................................................... 3-8 3.6 KM & Stability ............................................................................................. 3-11 3.7 KB ............................................................................................................ 3-13 3.8 Stern reference Point (SRP) .......................................................................... 3-13 3.9 Aft Perpendicular (FP and Forward Perpendicular (FP) ....................................... 3-13 3.10 Amidships .................................................................................................. 3-13 SECTION 4 – BLOCK LOADING 4.1 Block’s Initial Height Relative to the Others ..................................................... 4-1 4.2 Bearing Area of Ship on Block ....................................................................... 4-3 4.3 Types of Materials ....................................................................................... 4-4 4.4 Position of Block Under the Ship and Weight of Ship ......................................... 4-5 4.5 Trapezoidal Loading Equation ........................................................................ 4-8 4.6 Interrupted Keel Bearing .............................................................................. 4-11 4.7 Varying Width Keel ...................................................................................... 4-20 4.8 Moment Area Method ................................................................................... 4-28 4.9 No. Of Side Blocks Required to Resist Hurricane Forces ..................................... 4-45 4.10 No. Of Side Blocks Required to Resist Earthquake Forces .................................. 4-49 i DOCKMASTER’S TRAINING MANUAL TABLE OF CONTENTS SECTION 5 – STABILITY Page 5.1 Stability of Vessel Afloat ............................................................................... 5-1 5.2 Stability of Vessel at Time of Keel Touch Down ................................................ 5-7 5.3 Stability of Vessel at Time of Hauling Side Blocks ............................................. 5-10 5.4 Draft at 0 GM (Point of Instability .................................................................. 5-12 5.5 Vessel Stability at Undocking ........................................................................ 5-12 5.6 Example of Grounding Stability Calculations .................................................... 5-14 5.7 Stability of Floating Docks ............................................................................ 5-19 5.8 Multiplication Effect ..................................................................................... 5-25 SECTION 6 – PREDICTING VESSEL CONDITION AT UNDOCKING 6.1 Establishing the Baseline Docking Condition .................................................... 6-1 6.2 Tracking the Effects of Weight Changes .......................................................... 6-8 6.3 Calculating Vessel Drafts at Float Off .............................................................. 6-9 6.4 Calculating Vessel Stability at Float Off ........................................................... 6-11 6.5 Calculating Vessel List at Float Off ................................................................. 6-12 6.6 Summary of Vessel Condition at Float Off ....................................................... 6-12 SECTION 7 – BLOCK CONSTRUCTION 7.1 Principles & Concepts ................................................................................... 7-1 7.2 Types of Blocks ........................................................................................... 7-2 7.3 Blocking Material ......................................................................................... 7-4 7.4 Fastenings ................................................................................................. 7-8 7.5 Construction of Keel Blocks ........................................................................... 7-8 7.6 Construction of Side Blocks ........................................................................... 7-13 SECTION 8 – DOCKING PROCEDURES 8.1 Advance Preparation .................................................................................... 8-1 8.2 Preparation of the Docking Facility ................................................................. 8-2 8.3 Pre-Docking Checks ..................................................................................... 8-2 8.4 The Docking Operation ................................................................................. 8-3 8.5 Post-Docking Checks ................................................................................... 8-4 SECTION 9 – VESSEL HANDLING 9.1 Vessel Handling .......................................................................................... 9-1 9.2 Ropes ........................................................................................................ 9-2 ii DOCKMASTER’S TRAINING MANUAL TABLE OF CONTENTS SECTION 10 – DEVELOPING A PUMPING PLAN Page 10.1 Selecting Dock Drafts for Pumping Plan .......................................................... 10-1 10.2 Determining the Load on the Compartments ................................................... 10-3 10.3 Determining the Height of Internal Water ....................................................... 10-6 10.4 Using Lift Curves in Developing a Pumping Plan ............................................... 10-7 10.5 Using the Lift Curves ................................................................................... 10-9 10.6 Effects of Venting on Tank Level Readings ...................................................... 10-10 SECTION 11 – DRY DOCK CERTIFICATIONS 11.1 Commercial Certification .............................................................................. 11-2 11.2 U.S. Navy Certification ................................................................................. 11-3 11.3 Time Frame for Navy Certification .................................................................. 11-7 11.4 Re-certification ........................................................................................... 11-7 11.5 Maintenance Program .................................................................................. 11-8 SECTION 12 – DRY DOCK RATINGS 12.1 Rating of Floating Docks ............................................................................... 12-1 12.2 Rating of Basin Docks .................................................................................. 12-3 12.3 Rating of Marine Railways ............................................................................. 12-3 12.4 Rating of Vertical Lift ................................................................................... 12-4 SECTION 13 – DRY DOCK INSPECTIONS 13.1 Floating Dock Inspections ............................................................................. 13-1 13.2 Marine Railway Inspections ........................................................................... 13-10 13.3 Basin Dock Inspections ................................................................................ 13-21 13.4 Block Inspections ........................................................................................ 13-25 SECTION 14 – DRY DOCK TRANSFER SYSTEMS 14.1 Transfer Arrangement .................................................................................. 14-1 14.2 Transfer to and from Floating Docks ............................................................... 14-2 14.3 Transfer to and from Marine Railways / Vertical Lifts ........................................ 14-4 14.4 Transfer Cars .............................................................................................. 14-5 14.5 Propulsion Methods ..................................................................................... 14-5 iii
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