TRAININGTRAINING

MOORING

OPERATIONS

Snap back danger zone

Point of break

Point of restraint

Mooring ropeMooring rope

Snap Back Zone

Point of break

WHY CADET’S ????WHY CADET’S ????

INEXPERIENCED MOORING TEAM SAFERY CULTURE - AWARENESS WEAK LINKS BOOST SELF CONFIDENCE IDENTIFY HAZARDS MAINTENANCE GOOD OFFICER

SCOPE SCOPE

RISKY OPERATIONRISKY OPERATION HAZARDS MOORING LINE IMPROPER WORK PROCESS CREW COMPETENCE CREW CONCENTRATION WEATHER NEW JOINER MOORING EQUIPMENT COMMUNICATION

INCIDENCESINCIDENCES SLIP TRIP FALLS PARTING OF ROPES OIL LEAKS PARTING OF ROPE OR STOPPERS FAILURE OF MACHINERY NEAR MISSES

CONSEQUENCESCONSEQUENCES

WHAT DOES MOORING SYSTEM DO?WHAT DOES MOORING SYSTEM DO?

ASSIST IN HEAVING SHIP ALONGSIDE. PREVENTS DRITING AWAY ALONGSIDE WORKS AGAINST FORCES – WIND CURRENT, TIDES, SURGES DUE TO PASSING SHIP CHANGE OF DRAFT

HOW BIG ARE FORCES???HOW BIG ARE FORCES???

FORCES ON SHIP (T) = SQUARE OF WIND FORCES ON SHIP (T)= SQUARE OF

CURRENT GREATER FREEBOARD * GREATER FORCE

DUE TO WIND LESSER UKC GREATER EFFECT OF

CURRENT

EFFECT OF CURRENTEFFECT OF CURRENT BEAM CURRENT FORCE INCREASES AS THE DEPTH/DRAFT RATIO

REDUCESEFFECT OF UKC ON CURRENT FORCE

50 T 90 T150 T 200T

CURRENT IKT 5 Df 2 Df

0.2 Df0.5 Df

MOORING LINES- CONTROLS FORCESMOORING LINES- CONTROLS FORCES

1 2

1.HEAD LINE- BACKWARD FORCE (-Y)2.BREAST LINE-TRANSVERSE FORCE (-X)3. FWD SPRINGLINE – FWD FORCE (+Y)4.AFT SPRING LINE – AFT FORCE (-Y)5. AFT BREAST LINE – TRANSVERSE FORCE(-X)6.STERN LINE – FWD FORCE (+Y)

3 4 5 6

EFFECTIVENESS OF LINES EFFECTIVENESS OF LINES NO SHORT LINES DIP TO BE LESS THAN 30 DEGREE

(EFFECTIVENESS COSINE OF ANGLE)

SAME DIRECTION SAME LENGTHSAME MATERIALCARE AND MAINTENANCE

SNAP BACKSNAP BACK Line handlers must operate clear of the potential

snap – back path Sudden release of stored static energy in the

stretched synthetic line when it breaks. General rule,10 deg cone around line from point

of break to beyond point of secure to a distance almost its own length.

SNAP BACK ZONESNAP BACK ZONE

Method Of Using - Bollards & Method Of Using - Bollards & Rope stoppersRope stoppers

Two round turn (but not more) around leading post of the bitts before figure of eighting -(Distributes the load on bollard evenly )

Gypsy heads(mooring drums) should not be used to belay the mooring line.

Rope stopper should be of low stretch material. Material – Synthetic Fiber Rope Double Stopper is better than Single Stopper.

MOORING WINCHMOORING WINCH

RENDER FORCE-Force required to turn winch in opposite direction when set to heave with the driving force applied . (EXTERNAL force causing drum to turn to slack rope)

HEAVING FORCE < RENDER FORCE BREAK HOLDING POWER REDUCES WITH NO.

OF LAYERS ON DRUM. Support at lower part of the brake band to be adjusted.

(5mm – 8mm) WRONG REELING DIRECTION REDUCES BHC

POWER BY 50%. OIL, MOISTURE,RUST REDUCES BHC BY 75%

SPECIFICATIONSSPECIFICATIONS BRAKE HOLDING CAPACITY-1. Hawser Strength > BHC (Brake Slips

Before Hawser Brakes)2. BHC = 60% MBL(Minimum Breaking

Load ) of hawser.3. BHC > Heaving Capacity.(When brake

slips it is impossible to heave , till force causing the slip is reduced)

4. RF>BHC>HC ( FOR SAFETY )

BHC & Layers on Winch Drum Specs BHC & Layers on Winch Drum Specs

1. NO OF LAYERS BHC 1ST 100% 2ND 88% 3RD 80% 4TH 73% 5TH 67%

SPLIT DRUM WINCHESSPLIT DRUM WINCHES

SAFETY GUIDELINE: SHIFTING LINE FROM TENSION DRUM TO

STORAGE DRUM TO TENSION DRUM REQUIRES CARE AND

SUFFICIENT PERSONNEL NO MORE THAN ONE TURN TO ME

MAINTAINED ON TENSION DRUM.

MAINTENANCE – FREE LINKS,PINSMAINTENANCE – FREE LINKS,PINS

SAFETY CULTURE- BEHAVIOURSAFETY CULTURE- BEHAVIOUR

UNDERSTANDS SNAP BACK ZONE LEARNS MOORING WINCH OPERATION COMMUNICATION –VERBAL / NON VERBAL COMMUNICATION- INTERNAL/EXTERNAL PREPERATION FOR STATION FOLLOW PROCEDURES SWL ON MOORING ITEMS MOORING PLAN & UNDERSTAND TASK VIGILENT,IDENTIFYS HAZARDS

QUESTIONSQUESTIONS

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