2 MAN OVERBOARDA major concern of maritime operations is recovering personnel who have fallen overboard and safely transferring them from the water to the deck of a boat or hatch of a lifeboat. Several recovery systems are demonstrated.Recovery should not exceed 6 to 8 minutes
3 MAN OVERBOARDSeveral recovery techniques are demonstrated along with vessel approach techniques such as theWilliamson method.Procedures for marking the location of personnel inthe water with a flare or life-ring are discussed alongwith alternative rescue methods.
4 MAN OVERBOARD / GPS MOBThe Man Over Board (MOB) function is a common feature for marine GPS units.If a person falls overboard, the skipper uses this function to immediately mark the current location.The GPS goes into a "Goto" mode and directs the skipper back to the point where the button was pressed.
6 MOB / DIFFERENT SITUATIONS « Immediate action » situation Casualty is noticed on the bridge and action is initiated immediately"Delayed action" situation Casualty is reported to the bridge by an eye witness and action is initiated with some delay"Person missing" situation Person is reported to the bridge as "missing"
7 IMMEDIATE ACTIONFirst reaction: throw a lifebuoy with light in the direction of the person overboard / call the bridge /Shout: « man overboard »
8 BOUTAKOV (WILLIAMSON) MANOEUVRE Rudder hard over (in an "immediate action" situation, only to the side of the casualty)After deviation from the original course by 60º, rudder hard over to the opposite side.When heading 20º short of opposite course, rudder to midship position and ship to be turned to opposite course
9 SINGLE TURNRudder hard over (in an "immediate action" situation, only to the side of the casualty) .After deviation from the original course by 250º, rudder to midship position and stopping manoeuvre to be initiated.
10 SCHARNOW TURN Rudder hard over After deviation from the original course by 240º, rudder hard over to the opposite side.When heading 20º short of opposite course, rudder to midship position so that ship will turn to opposite course.
11 IMMEDIATE ACTION SITUATION SINGLE TURN will take the ship back to the scene of the casualty most quickly.WILLIAMSON TURN requires more time and will temporarily take the ship farther away from the scene of the casualty.SCHARNOW TURN is not appropriate.
12 DELAYED ACTION SITUATION WILLIAMSON TURN will take the ship to the scene of the casualty most surely (When the ship has reached the manoeuvre commencement point, search speed must be reduced so as to enable fast stopping) SCHARNOW TURN cannot be carried out effectively unless the time elapsed between the occurrence of the casualty and the commencement of the manoeuvre is known.
13 MISSING PERSON SITUATION Both WILLIAMSON TURN and SCHARNOW TURN take ship back into her wake. Less distance is covered, and thus time is saved, with SCHARNOW TURN. When ship on opposite course after carrying out SCHARNOW TURN, the manoeuvre commencement point will be some ship's lengths behind her stern. Between one and two nautical miles may be saved. Standard man-overboard manoeuvres are not guaranteed to return a ship into its wake: should be regularly practiced to account for the particular ship characteristics and the effects of environmental conditions on the ship and the person in the water.
14 MISSING PERSON SITUATION Comparison between Williamsonand ScharnowFor Scharnow: time betweencasualty and start of manœuvremust be known
17 BOUTAKOV (WILLIAMSON) MANOEUVRE RemarksFirst heading change: between 40° and 70° - depending on the ship’s manoeuvring characteristics (for VLCC: 40°)Second heading change: 180° + value of first heading changeEngine revs to be mofified after 2nd heading changeAnticipate with counter-rudder due to momentum of the shipEffects of wind and current will alter the curveStop the vessel ot windward of the victim
18 BOUTAKOV (WILLIAMSON) MANOEUVRE AdvantageAuto-recoveryIdeal with reduced visibilityDisadvantagesGreat distance between victim and ship during the turnVictim pass behind the stern from Ps (Sb) to other side: lost from viewThe slowest MOB manœuvre: between 6 and 12 minutes: victim remain 15 minutes in the water
19 SINGLE TURNRemarks« Immediate action » manœuvreChange of heading: between 250° and 300° due to the momentum of the shipDuration: between 4 and 7 minutesRevs to be modified at the end of the turnTrials recommandedStop the vessel to windward of the victim
20 Williamson turn versus Single turn Under favourable dailight conditionsA simple round turn is the best wayTo get back to a man overboard in aHurry.
21 SCHARNOW TURNAdvantagesAuto-recovery: ship is brought back on opposite courseVictim always in view of rescue team on the bridgeTime needed is shorter than BoutakovDisadvantageNot an « immediate action » manoeuvre
22 ADDITIONAL MANOEUVRES Stop the vessel and full asternDouble TurnSingle Delayed Turn
23 STOP THE VESSEL AND FULL ASTERN Advantages« immediate action » manoeuvreRecommanded whith limited initial speedBrings the ship faster on the sceneDisadvantagesWith single screw ships: transverse thrust will turn the shipWind effects will alter the manœuvreOnly with motor ships / turbine ships are too slow to reverseMomentum of big ships
25 « immediate action » manœuvre English variant: DOUBLE TURN« immediate action » manœuvreEnglish variant:First 180° change of headingShip back on opposite courseStart 2nd heading change when victim on three point athwartshipsReduce revs and approach at windwardDutch variant:Start 2nd heading change when actual speed = initial speedSome sources recommand this manœuvre with beam winds ↔ Boutakov with stern winds
27 SINGLE DELAYED TURNThis is an « immediate action » manoeuvreProcedureShip keeps her initial heading for one mileStart of turning circleStabilize vessel when new heading =initial heading + 180° + tangent of tactical diameterin milesExample: for a tactical diameter of 0,364 → 200° change of heading
28 MAN OVERBOARDRemarksalways stops vessel at windward: stopped vessel drifts faster than man in waterA man losses consciousness after 15 minutes in water at 5°1st approach must always succeed
29 AUDIBLE SIGNAL WITH SIREN OSCAR_ _ _Will enhance moral of the victim