Month: December 2018

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Use of Brine Traps

  1.  Brine pipes are provided to seal the drain pipe from tween decks to bilges in order to allow only one drain passage from tween deck to bilges.
  2. To stop any backflow of gases or foul odours from bilges to cargo space.
  3. They should be checked and Topped up to prevent cold air from entering the bilges and freezing them or odour from reaching refrigerated compartment.

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Material safety data sheet(MSDS)

Is provided for all chemical cargo.

Purpose

  • MSDS is carried onboard for ensuring the safety of Marine environment and ship crew.
  • MSDS provide useful and accessible informations on the product carried onboard either as a cargo or for operational purpose.
  • MSDS is to be carried out for all individual hazardous material carried onboard along with proper PPE so that in time of emergency appropriate procedure and Swift response can be achieved.

CONTENT OF MSDS (Material safety data sheet)

  1. Hazard identification along with identification of the mix.
  2. Composition or information of the ingredients.
  3. Ecological and disposal informations.
  4. Transportation and regulatory informations
  5. Accidental release measure .
  6. Handling and stowage criteria.
  7. Chemical and physical properties of mix.
  8. Personal protection and exposal control.
  9. Information about the toxicity of the material.
  10. Firefighting measures.
  11. First aid measures .
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Load on top

  • The discharges from seawater washing were still considered a problem . During the 1960s the load on top approach began to be adopted. The mixture of cleaning water and residue was pumped into a

During the 1960s the load on top approach began to be adopted. The mixture of cleaning water and residue was pumped into a

  • slop tank and allowed to separate by their different densities into oil and water during the journey.
    • The water portion was then discharged .
    • Leaving only crude oil in the slop tank. This was pumped into the main tanks and the new cargo loaded on top of it, recovering as much as 800 tons of oil which was formerly discarded.

  • The water portion was then discharged .
  • Leaving only crude oil in the slop tank. This was pumped into the main tanks and the new cargo loaded on top of it, recovering as much as 800 tons of oil which was formerly discarded.

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Slop tanks and handling of slops

Slop tank – Slop tank means a tank specifically designed for the collection of tank drainage ,tank washing and other oily mixtures.

Handling of slops

Mixture settle down during the passage water being more dense settles downwards and oil keep floating on top.

the water which has settle down is now passed through ODMCS( which ensures that the oil concentration present in this water is below federal standards.) And then to TWV and from there through spool and manual valve which discharges overboard.

Oily water that cannot fullfill ODMCS Criteria returns back to tank.

The oil floating on top is given to shore .

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Roll on Roll off vessel (ro-ro vessel)

Ro Ro is an acronym for roll-on/roll-off. Ro-Ro ships are vessels that are used to carry wheeled cargo.

The vehicles in the ship are loaded and unloaded by means of build in ramps. Normally these ramps are made towards the stern (back side) of the ship. In some vessels they are also found on the bow side as well as sides of the ship.

There are various types of ro do ships such as ferries, cruise ferries, cargo ships and barges. The roro vessel that are exclusively used for transporting cars and trucks across oceans are known as pure car carrier (PCC)and truck carrier(PCTC) respectively.

roro cargoes are measured in units called length in metre.(LIMs).

LIM is calculated by multiplying cargo length in meter and it’s width in lanes. And number of decks.

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Securing and lashing arrangement of containers

  1. Containers should be placed preferably in fore aft direction.
  2. Safe passage should not get blocked.
  3. Containers should be secured such that bottom corners are prevented from sliding. And top corner to prevent toppling.
  4. Securing should not be done in such a way that containers extend over ships side.
  5. Deck containers should be carried at single height , with the use of twist locks this height may be increased.
  6. No restraint system should cause excessive stress on container.
  7. Throughout voyage keep checking lashing is tight and sound.
  8. When loading of container is done on hatch cover, these hatch covers should be secured to ship .
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Procedure for man entry in enclosed space.

Enclosed space permit – It is a work permit that is issued prior to entry into enclosed space. This permit is issued only after  REQUIRED SAFETY CHECKS  AND INSPECTION OF SPACE have been done and necessary precautions have been taken.

Procedure for man entry in enclosed space.

  1. Obtain enclosed space permit .
  2. Ensure that the space to enter is well ventilated.
  3. Check for oxygen content and toxic gases before entry.
  4. Space to be entered should be adequately illuminated.
  5. Ensure that a rescue system is ready for immediate use in case of emergency.
  6. A responsible person is at standby outside the space and is actively communicating with the person inside the space. (Function of the person in stand by is to raise alarm if difficulties are experienced by those inside the enclosed space. )
  7. Regular monitoring of the atmosphere inside the space is done.
  8. A permit to work is displayed at the entrance of the space.
  9. Ventilation arrangement should be continuously in use till the person is inside the enclosed space.
  10.  All personnel should be briefed on withdrawal procedure from the space, In case of emergency. 
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