ROLL-ON/ ROLL-OFF SHIPS

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A Roll-On / Roll-Off [Ro-Ro] specifically designed to carry wheeled and tracked vehicles as all or most of its cargo.

Vehicles are driven or towed on and off the ship by means of either the ship's own ramps or shore-based ramps.

Roll-on / roll-off cargo handling systems refer to systems used when the cargo can be rolled onto the vessel.

Another type of Ro-Ro system uses fork lifts to load cargo (the fork lifts roll the cargo on and off the deck).

These systems reduce costs associated with cargo loading (expensive crane systems and skilled crane operators are not required).

Advantage to call on smaller and less-developed ports.

The disadvantage the waste of cargo carrying capacity due to undercarriage and all-around clearance requirements.

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1. quarter stern ramp (krmenarampa)

2. finger flaps (klapna / poklopac)

3. actuating cables (pogonski)

4. stern door (krmena vrata)

5. king post (teretni stup / nosač)

6. trunk (ventilacijski kanal)

7. ventilator heads (mushroom type) (ventilator)

8. on-deck containers

9. bow thruster (pramčanipropeler / pramčani bočnivijak)

10. Ramp (rampa)

11. after thruster (krmenipropeler/vijak)

12. fork lift truck (FLT – viličar)

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Ro-Ro equipment

cargo lifts

car deck

internal ramps

side door

side ramp (bočna ukrcajna rampa)

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Stern ramps Axial ramp (axijalna, uzdužna

rampa) Quarter ramp (krmena, kvartirna

rampa) Slewing ramp (okretna krmena

rampa)

Semi-slewing ramp

Bow ramps (pramčana rampa)Bow bulkhead door(pramčana nepropusna vrata) Hydraulic drives for

a. Bow doorb. Bow visor (natkapnik)

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TRANSFER AND ACCESS GEAR stern door (krmena vrata) - also acts as the ramp connecting the ship to the bridge ramp; very

large, cope with at least two lanes of traffic.

bow doors (pramčana vrata) - must be as strong as the surrounding fore end; generally side-hinged, hinged to open upwards.

internal ramps (unutarnja rampa) – used for distributing vehicles at various levels throughout the cargo space.

hoistable platforms (podizna platforma, platforma na podizanje)

bulkhead door (nepropusna vrata)

side ramp (bočna rampa)

slewing ramp (okretna rampa) – enables a ship to load and discharge wheeled cargo directly astern, over the porter quarter or over the starboard quarter.

Advantage: makes the ship completely independent of port facilities, can berth in remote ports, estuaries, rivers etc. where only one berthing position is possible.

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